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1,023 | Configure IPv6 Family BGP Neighbor Settings
This section describes the steps required to define BGP neighbors and neighbor settings.
Procedure
Step 1 Enable a BGP routing process, which places the router in router configuration mode:
router bgp autonomous-num
Example:
ciscoasa(config)# router bgp 2
Step 2 Enter address... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,024 | Step 6 Enable or disable the Border Gateway Protocol (BGP) graceful restart capability for a BGP neighbor:
neighbor {ip-address} ha-mode graceful-restart [disable]
Example:
ciscoasa(config-router-af)# neighbor 2000::1/8 ha-mode graceful-restart
(Optional) The disable keyword disables BGP graceful restart capability for... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,025 | • maximum — the maximum number of prefixes allowed from this neighbor.
• (Optional) threshold — integer specifying at what percentage of maximum the router starts to generate
a warning message. The range is from 1 to 100; the default is 75 (percent).
• (Optional) restart interval — integer value (in minutes) that speci... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,026 | • non-exist-map map name — the name of the non-exist-map that is compared with the routes in the BGP
table to determine whether the advertise-map route is advertised or not.
• (Optional) check all paths — enables checking of all paths by the exist-map with a prefix in the BGP
table.
Step 15 Sets the timers for a specif... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,027 | ciscoasa(config-router-af)# neighbor 2000::1 next-hop-self
Step 19 Accept and attempt BGP connections to external peers residing on networks that are not directly connected:
neighbor {ipv6-address} ebgp-multihop [ttl]
Example:
ciscoasa(config-router-af)# neighbor 2000::1 ebgp-multihop 5
The argument ttl specifies time-... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,028 | neighbor {ipv6-address} transport {connection-mode{active|passive}| path-mtu-discovery[disable]}
Example:
ciscoasa(config-router-af)# neighbor 2000::1 transport connection-mode active
• connection-mode — the type of connection (active or passive).
• path-mtu-discovery — enables TCP transport path maximum transmission u... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,029 | Procedure
Step 1 Enable a BGP routing process, which places the ASA in router configuration mode:
router bgp autonomous-num
Example:
ciscoasa(config)# router bgp 2
Step 2 Enter address family configuration mode to configure a routing session using standard IP Version 6 (IPv6)
address prefixes:
address-family ipv6 [unic... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,030 | Step 2 Enter address family configuration mode to configure a routing session using standard IP Version 6 (IPv6)
address prefixes:
address-family ipv6 [unicast]
Example:
ciscoasa(config-router)# address-family ipv6[unicast]
Step 3 Redistribute routes from another routing domain into a BGP autonomous system:
redistribut... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,031 | The route map should be examined to filter the networks to be redistributed. If not specified, all
networks are redistributed
Note
Configure IPv6 Route Injection Settings
This section describes the steps required to define the routes to be conditionally injected into the BGP routing
table.
Procedure
Step 1 Enable a BGP... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,032 | To monitor various BGP routing statistics, enter one of the following commands:
• show bgp [ip-address [mask [longer-prefixes [injected] | shorter-prefixes [length]]]| prefix-list name |
route-map name]
Displays the entries in the BGP routing table.
• show bgp cidr-only
Displays routes with non-natural network masks (t... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,033 | Displays IPv6 Border Gateway Protocol (BGP) routes matching the autonomous system path regular
expression as a quoted string of characters.
• show bgp ipv6 regexp
Displays IPv6 Border Gateway Protocol (BGP) routes matching the autonomous system path regular
expression.
• show bgp ipv6 route-map
Displays IPv6 Border Gat... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,034 | To disable BGP Log messages, enter the no bgp log-neighbor-changes command in the router configuration
mode. This disables the logging of neighbor change messages. Enter this command in router configuration
mode for the BGP routing process. By default, neighbor changes are logged.
Note
Example for BGP
This example show... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,035 | 1. Define the conditions for redistributing routes from one routing protocol into another, or enable policy
routing:
ciscoasa(config)# route-map mymap1 permit 10
2. Redistribute any routes that have a route address or match packet that is passed by one of the access lists
specified:
ciscoasa(config-route-map)# match ip... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,036 | History for BGP
Table 40: Feature History for BGP
Platform Feature Information
Releases
Feature Name
Support was added for routing data, performing authentication,
and redistributing and monitoring routing information using the
Border Gateway Protocol.
We introduced the following commands: router bgp, bgp
maxas-limit, ... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,037 | Platform Feature Information
Releases
Feature Name
We added support for IPv6.
We introduced the following commands: address-family ipv6,
ipv6 prefix-list, ipv6 prefix-list description, ipv6 prefix-list
sequence-number, match ipv6 next-hop, match ipv6
route-source, match ipv6- address prefix-list, set ipv6-address
prefi... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,038 | CHAPTER 33
OSPF
This chapter describes how to configure the ASA to route data, perform authentication, and redistribute routing
information using the Open Shortest Path First (OSPF) routing protocol.
• About OSPF, on page 979
• Guidelines for OSPF, on page 982
• Configure OSPFv2, on page 985
• Configure OSPFv2 Router I... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,039 | The ASA can run two processes of OSPF protocol simultaneously on different sets of interfaces. You might
want to run two processes if you have interfaces that use the same IP addresses (NAT allows these interfaces
to coexist, but OSPF does not allow overlapping addresses). Or you might want to run one process on the
in... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,040 | OSPF Support for Fast Hello Packets
The OSPF Support for Fast Hello Packets feature provides a way to configure the sending of hello packets in
intervals less than one second. Such a configuration would result in faster convergence in an Open Shortest
Path First (OSPF) network.
Prerequisites for OSPF Support for Fast H... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,041 | Implementation Differences Between OSPFv2 and OSPFv3
OSPFv3 is not backward compatible with OSPFv2. To use OSPF to route both IPv4 and IPv6 traffic, you
must run both OSPFv2 and OSPFv3 at the same time. They coexist with each other, but do not interact with
each other.
The additional features that OSPFv3 provides inclu... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,042 | Firewall Mode Guidelines
OSPF supports routed firewall mode only. OSPF does not support transparent firewall mode.
Failover Guidelines
OSPFv2 and OSPFv3 support Stateful Failover.
IPv6 Guidelines
• OSPFv2 does not support IPv6.
• OSPFv3 supports IPv6.
• OSPFv3 uses IPv6 for authentication.
• The ASA installs OSPFv3 rou... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,043 | Multiprotocol Label Switching (MPLS) and OSPF Guidelines
When a MPLS-configured router sends Link State (LS) update packets containing opaque Type-10 link-state
advertisements (LSAs) that include an MPLS header, authentication fails and the appliance silently drops the
update packets, rather than acknowledging them. Ev... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,044 | Configure OSPFv2
This section describes how to enable an OSPFv2 process on the ASA.
After you enable OSPFv2, you need to define a route map. For more information, see Define a Route Map,
on page 925. Then you generate a default route. For more information, see Configure a Static Route, on page
899.
After you have defin... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,045 | Configure a Key Chain for Authentication
To enhance data security and protection of devices, you can enable rotating keys for authenticating IGPpeers.
The rotating keys prevent any malicious user from guessing the keys used for routing protocol authentication
and thereby protecting the network from advertising incorrec... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,046 | ciscoasa(config-keychain-key)# key-string 0 CHAIN1KEY1STRING
ciscoasa(config-keychain-key)#
Step 4 Configure the cryptographic algorithm for the key chain:
cryptographic-algorithmmd5
You need to provide the cryptographic authentication algorithm. Though the platform supports SHA1 and
MD5, only MD5 is supported for key ... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,047 | key-string KEY1CHAIN2
cryptographic-algorithm md5
key 2
accept-lifetime 11:00:12 Sep 1 2018 11:12:12 Sep 1 2018
cryptographic-algorithm md5
key chain CHAIN1
key 1
key-string CHAIN1KEY1STRING
accept-lifetime 11:22:33 Sep 1 2018 duration -1
cryptographic-algorithm md5
ciscoasa# sh run key chain CHAIN1
key chain CHAIN1
ke... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,048 | ciscoasa(config-router)# no router-id 193.168.3.3
Router ID Behaviour while Migrating
While migrating OSPF configuration from one ASA , say ASA 1 to another ASA, say ASA 2, the following
router id selection behaviour is observed:
1. ASA 2 does not use any IP address for OSPF router-id when all interfaces are in shutdow... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,049 | ciscoasa(config-if)# ospf dead-interval minimal hell0-multiplier 5
ciscoasa
The no. of times argument indicates the number of hello packets to be sent every second. Valid values are
between 3 and 20.
In this example, OSPF Support for Fast Hello Packets is enabled by specifying the minimal keyword and the
hello-multipli... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,050 | ciscoasa(config)# redistribute connected 5 type-1 route-map-practice
Step 3 Redistribute static routes into the OSPF routing process:
redistribute static [metric metric-value] [metric-type {type-1 | type-2}] [tag tag_value] [subnets] [route-map
map_name
Example:
ciscoasa(config)# redistribute static 5 type-1 route-map-... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,051 | ciscoasa(config-route-map)# set metric-type type-1
ciscoasa(config-rtr)# redistribute ospf 1 route-map 1-to-2
Configure Route Summarization When Redistributing Routes Into OSPFv2
When routes from other protocols are redistributed into OSPF, each route is advertised individually in an
external LSA. However, you can conf... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,052 | Configure Route Summarization Between OSPFv2 Areas
Route summarization is the consolidation of advertised addresses. This feature causes a single summary route
to be advertised to other areas by an area boundary router. In OSPF, an area boundary router advertises
networks in one area into another area. If the network n... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,053 | ciscoasa(config)# router ospf 2
The process-id argument is an internally used identifier for this routing process and can be any positive integer.
This ID does not have to match the ID on any other device; it is for internal use only. You can use a maximum
of two processes.
Step 2 Define the IP addresses on which OSPF ... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,054 | ciscoasa(config-interface)# ospf cost 20
The cost is an integer from 1 to 65535.
In this example, the cost is set to 20.
Step 7 Set the number of seconds that a device must wait before it declares a neighbor OSPF router down because
it has not received a hello packet:
ospf dead-intervalseconds
Example:
ciscoasa(config-... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,055 | In multiple context mode, for shared interfaces, specify 0 to ensure the device does not become the designated
router. OSPFv2 instances cannot form adjacencies with each other across shared interfaces.
Step 11 Specify the number of seconds between LSA retransmissions for adjacencies belonging to an OSPFinterface:
ospf ... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,056 | Stub areas are areas into which information on external routes is not sent. Instead, there is a default external
route generated by the ABR into the stub area for destinations outside the autonomous system. To take
advantage of the OSPF stub area support, default routing must be used in the stub area. To further reduce... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,057 | ciscoasa(config)# router ospf 2
Step 2 Filter routes or networks received in incoming or advertised in outgoing OSPF updates:
distribute-list acl-number in [interface ifname]
distribute-list acl-number out [protocol process-number | connected | static]
The argument acl-number specifies IP access list number. The access... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,058 | Procedure
Step 1 Create an OSPF routing processs:
router ospf process_id
Example:
ciscoasa(config)# router ospf 2
The process_id argument is an internally used identifier for this routing process. It can be any positive integer.
This ID does not have to match the ID on any other device; it is for internal use only. You... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,059 | router-id cluster-pool hostname | A.B.C.D ip_pool
Example:
hostname(config)# ip local pool rpool 1.1.1.1-1.1.1.4
hostname(config)# router ospf 1
hostname(config-rtr)# router-id cluster-pool rpool
hostname(config-rtr)# network 17.5.0.0 255.255.0.0 area 1
hostname(config-rtr)# log-adj-changes
The cluster-pool keyword ena... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,060 | The addr argument is the IP address of the OSPFv2 neighbor. The if_name argument is the interface used to
communicate with the neighbor. If the OSPF v2neighbor is not on the same network as any of the directly
connected interfaces, you must specify the interface.
Configure Route Calculation Timers
You can configure the... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,061 | Procedure
Step 1 Create an OSPFv2 routing process:
router ospf process_id
Example:
ciscoasa(config)# router ospf 2
The process_id argument is an internally used identifier for this routing process and can be any positive
integer. This ID does not have to match the ID on any other device; it is for internal use only. Yo... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,062 | keykey-id
The key id value can be between 0 and 255. Use the value 0 only when you want to signal an invalid key.
Example:
ciscoasa(config-keychain)# key 1
ciscoasa(config-keychain-key)#
Step 3 Configure the key or password for the key chain:
key-string [0 | 8 ] key-string-text
• Use 0 to indicate an unencrypted passwo... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,063 | ciscoasa(config-keychain-key)# accept-lifetime 11:22:33 1 SEP 2018 infinite
ciscoasa(config-keychain-key)#
You can use the show key chaincommand to view the start-up key chain configuration on the device;
show run key chain command to view the key chain configuration that is currently running on the
device.
ciscoasa# s... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,064 | Enable OSPFv3
To enable OSPFv3, you need to create an OSPFv3 routing process, create an area for OSPFv3, enable an
interface for OSPFv3, then redistribute the route into the targeted OSPFv3 routing processes.
Procedure
Step 1 Create an OSPFv3 routing process:
ipv6 router ospf process-id
Example:
ciscoasa(config)# ipv6 ... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,065 | Example:
ciscoasa(config-if)# ipv6 router ospf 10
The process-id argument is an internally used tag for this routing process and can be any positive integer.
This tag does not have to match the tag on any other device; it is for internal use only. You can use a maximum
of two processes.
Step 2 Create an OSPFv3 area:.
i... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,066 | ciscoasa(config-if)# interface GigabitEthernet3/2.200
vlan 200
nameif outside
security-level 100
ip address 10.20.200.30 255.255.255.0 standby 10.20.200.31
ipv6 address 3001::1/64 standby 3001::8
ipv6 address 6001::1/64 standby 6001::8
ipv6 enable
ospf priority 255
ipv6 ospf cost 100
ipv6 ospf 100 area 10 instance 200
... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,067 | The ipsec keyword specifies the IPsecurity protocol. The spi spi keyword-argument pair specifies the security
policy index, which must be in the range of 256 to 42949667295 and entered as a decimal.
The esp keyword specifies the encapsulating security payload. The encryption-algorithm argument specifies
the encryption ... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,068 | ciscoasa(config-if)# interface GigabitEthernet3/2.200
vlan 200
nameif outside
security-level 100
ip address 10.20.200.30 255.255.255.0 standby 10.20.200.31
ipv6 address 3001::1/64 standby 3001::8
ipv6 address 6001::1/64 standby 6001::8
ipv6 enable
ospf priority 255
ipv6 ospf cost 100
ipv6 ospf 100 area 10 instance 200
... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,069 | Step 11 Set the router priority, which helps determine the designated router for a network:
ipv6 ospf priority number-value
Example:
ciscoasa(config-if)# interface GigabitEthernet3/2.200
vlan 200
nameif outside
security-level 100
ip address 10.20.200.30 255.255.255.0 standby 10.20.200.31
ipv6 address 3001::1/64 standby... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,070 | The time must be greater than the expected round-trip delay between any two routers on the attached network.
Valid values range from 1 to 65535 seconds. The default is 5 seconds.
Step 14 Set the estimated time in seconds to send a link-state update packet on the interface:
ipv6 ospf transmit-delay seconds
Example:
cisc... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,071 | default
Example:
ciscoasa(config-rtr)# default originate
The originate parameter distributes the default route.
Step 4 Control distribution of default information:
default-information
Step 5 Define the OSPFv3 route administrative distance based on the route type:
distance
Example:
ciscoasa(config-rtr)# distance 200
Sup... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,072 | • connected—Specifies connected routes.
• ospf—Specifies OSPFv3 routes.
• static—Specifies static routes.
Example:
ciscoasa(config-rtr)# redistribute ospf
Step 10 Create a fixed router ID for a specified process:
router-id {A.B.C.D | cluster-pool | static}
Where:
A.B.C.D—Specifies the OSPF router ID in IP address forma... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,073 | ciscoasa(config-rtr)# timers throttle spf 6000 12000 14000
Configure OSPFv3 Area Parameters
Procedure
Step 1 Enable an OSPFv3 routing process:
ipv6 router ospf process-id
Example:
ciscoasa(config)# ipv6 router ospf 1
The process-id argument is an internally used identifier for this routing process, is locally assigned,... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,074 | Step 4 Specify an NSSA area:
area area-id nssa
Example:
ciscoasa(config-rtr)# area 1 nssa
Step 5 Specify a stub area:
area area-id stub
Example:
ciscoasa(config-rtr)# area 1 stub
Step 6 Define a virtual link and its parameters:
area area-id virtual-link router-id [hello-interval seconds] [retransmit-interval seconds] [... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,075 | • The ttl-securityhops keyword configuresthe time-to-live (TTL)security on a virtual link. The hop-count
argument value can range from 1 to 254.
Configure OSPFv3 Passive Interfaces
Procedure
Step 1 Enable an OSPFv3 routing process:
ipv6 router ospf process_id
Example:
ciscoasa(config-if)# ipv6 router ospf 1
The process... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,076 | The process_id argument is an internally used identifier for this routing process, is locally assigned, and can
be any positive integer from 1 to 65535. This ID does not have to match the ID on any other device; it is for
internal administrative use only. You can use a maximum of two processes.
Step 2 Set the administr... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,077 | Example:
ciscoasa(config-rtr)# timers lsa flood 20
The milliseconds argument specifies the time in milliseconds at which LSAs in the flooding queue are paced
in between updates. The configurable range isfrom 5 to 100 milliseconds. The default value is 33 milliseconds.
Step 4 Change the interval at which OSPFv3 LSAs are... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,078 | ciscoasa(config-rtr)# timers throttle spf 5000 12000 16000
• The milliseconds1 argumentspecifiesthe delay in millisecondsto receive a change to theSPFcalculation.
The milliseconds2 argument specifies the delay in milliseconds between the first and second SPF
calculations. The milliseconds3 argument specifies the maximu... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,079 | Reset OSPFv3 Default Parameters
To return an OSPFv3 parameter to its default value, perform the following steps:
Procedure
Step 1 Enable an OSPFv3 routing process:
ipv6 router ospf process-id
Example:
ciscoasa(config-if)# ipv6 router ospf 1
The process_id argument is an internally used identifier for this routing proce... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,080 | Send Syslog Messages
Configure the router to send a syslog message when an OSPFv3 neighbor goes up or down.
Procedure
Step 1 Enable an OSPFv3 routing process:
ipv6 router ospf process-id
Example:
ciscoasa(config-if)# ipv6 router ospf 1
The process-id argument is an internally used identifier for this routing process, i... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,081 | ignore lsa mospf
Example:
ciscoasa(config-rtr)# ignore lsa mospf
Calculate Summary Route Costs
Procedure
Restore the methods that are used to calculate summary route costs according to RFC 1583:
compatible rfc1583
Example:
ciscoasa (config-rtr)# compatible rfc1583
Generate a Default External Route into an OSPFv3 Routin... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,082 | • The metric metric-value keyword-argument pair specifies the metric used for generating the default
route.
• If you do not specify a value using the default-metric command, the default value is 10. Valid metric
values range from 0 to 16777214.
• The metric-type type-value keyword-argument pair specifies the external l... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,083 | keyword-argument pair specifies the tag value that can be used as a match value for controlling redistribution
through route maps. This keyword applies to OSPFv3 only.
Redistribute IPv6 Routes
Procedure
Step 1 Enable an OSPFv3 routing process:
ipv6 router ospf process-id
Example:
ciscoasa(config-if)# ipv6 router ospf 1... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,084 | • The metric transparent keyword causes RIP to use the routing table metric for redistributed routes as
the RIP metric.
• The metric-type type-value keyword-argument pair specifies the external link type that is associated
with the default route that is advertised into the OSPFv3 routing domain. Valid values can be one... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,085 | • For a device to be either NSF-aware or NSF-capable, it should be configured with the capability of
handling opaque Link State Advertisements (LSAs)/ Link Local Signaling (LLS) block as required.
When fast hellos are configured for OSPFv2, graceful restart does not occur when the active unit reloads and
the standby un... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,086 | Procedure
Step 1 Enable Cisco NSF on a NSF-capable device:
nsf cisco [enforce global]
Example:
ciscoasa(config-router)# nsf cisco
The enforce global keyword cancels NSF restart when non-NSF-aware neighbor devices are detected.
Step 2 Enable Cisco NSF helper mode on NSF-aware device:
capability {lls|opaque}
Example:
cis... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,087 | The strict-LSA-checking keyword indicates that the helper router will terminate the process of the restarting
router if it detects that there is a change to a LSA that would be flooded to the restarting router, or if there is
a changed LSA on the retransmission list of the restarting router when the graceful restart pr... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,088 | The graceful-restart helper mode is enabled by default.
Configuring Graceful Restart Wait Timer for OSPF
OSPF routers are expected to set the RS-bit in the EO-TLV attached to a Hello packet when it is not known
that all neighbors are listed in the packet, but the restarting routers require to preserve their adjacencies... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,089 | clear configure router ospf pid
Example:
ciscoasa(config)# clear configure router ospf 1000
After the configuration is cleared, you must reconfigure OSPF using the router ospf command.
Remove the OSPFv3 Configuration
Remove the OSPFv3 configuration.
Procedure
Remove the entire OSPFv3 configuration that you have enabled... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,090 | ciscoasa(config)# router ospf 2
ciscoasa(config-rtr)# network 10.0.0.0 255.0.0.0 area 0
ciscoasa(config-rtr)# interface inside
ciscoasa(config-interface)# ospf cost 20
ciscoasa(config-interface)# ospf retransmit-interval 15
ciscoasa(config-interface)# ospf transmit-delay 10
ciscoasa(config-interface)# ospf priority 20
... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,091 | 7. To clear the OSPFv2 configuration, enter the following command:
ciscoasa(config)# clear configure router ospf pid
Examples for OSPFv3
The following example shows how to enable and configure OSPFv3 at the interface level:
ciscoasa (config)# interface GigabitEthernet3/1
ciscoasa (config-if)# ipv6 enable
ciscoasa (conf... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,092 | ciscoasa (config)# log-adjacency-changes
ciscoasa (config)# redistribute connected metric 100 metric-type 1 tag 700
For an example of how to configure an OSPFv3 virtual link, see the following URL:
http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a0080b8fd06.shtml
Monitoring OSPF
You can dis... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,093 | Command Purpose
show ospf interface [if_name] Displays OSPFv2-related interface information.
Displays OSPFv2 neighbor information on a
per-interface basis.
show ospf neighbor [interface-name] [neighbor-id]
[detail]
show ospf request-list neighbor if_name Displays a list of all LSAs requested by a router.
show ospf retr... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,094 | Command Purpose
Displays a list of LSAs waiting to be flooded over an
interface (to observe OSPFv3 packet pacing).
OSPFv3 update packets are automatically paced so
they are not sent less than 33 milliseconds apart.
Without pacing, some update packets could get lost
in situations where the link is slow, a neighbor could... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,095 | Command Purpose
Displaysthe IPv6 routing table sequence number, IPv6
reconvergence timer status, and IPv6 routing entries
sequence number in a cluster.
show ipv6 route cluster [failover] [cluster]
[interface] [ospf] [summary]
History for OSPF
Table 41: Feature History for OSPF
Feature Name Platform Releases Feature Inf... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,096 | Feature Name Platform Releases Feature Information
OSPFsupportstheFast HelloPacketsfeature, resulting in a configuration that results
in faster convergence in an OSPF network.
We modified the following command: ospf dead-interval
OSPF support for Fast 9.2(1)
Hellos
New OSPF timers were added; old ones were deprecated.
... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,097 | CLI Book 1: Cisco Secure Firewall ASA Series General Operations CLI Configuration Guide, 9.19
1038
IP Routing
History for OSPF | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,098 | CHAPTER 34
IS-IS
This chapter describes the Intermediate System to Intermediate System (IS-IS) routing protocol.
• About IS-IS, on page 1039
• Prerequisites for IS-IS, on page 1045
• Guidelines for IS-IS, on page 1045
• Configure IS-IS, on page 1046
• Monitoring IS-IS, on page 1075
• History for IS-IS, on page 1078
• E... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,099 | You can assign multiple area addresses to an IS-IS instance; in this case, all area
addresses are considered synonymous. Multiple synonymous area addresses are
useful when merging or splitting areas in the domain. Once the merge or split
has been completed, you do not need to assign more than one area address to an
IS-... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,100 | IIHs
IIHs are exchanged between IS neighbors on circuits that have the IS-IS protocol enabled. IIHs include
the system ID of the sender, the assigned area address(es), and the identity of neighbors on that circuit
that are known to the sending IS. Additional optional information can also be included.
There are two type... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,101 | An IS forms a Level-1 adjacency with other ISes that support Level 1 on the circuit and has a matching area
address. Two ISes with disjointed sets of area addresses supporting Level 1 on the same multiaccess circuit
is NOT supported. An IS forms a Level-2 adjacency with other ISes that support Level 2 on the circuit.
T... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,102 | following activities, which efficiently and reliably synchronizes the LSPDBs of all ISes on a multiaccess
circuit:
• Flood LSPs that are absent from or are newer than those that are described in the CSNPs sent by the DIS.
• Request an LSP by sending a PSNP for LSPs that are described in the CSNPs sent by the DIS that a... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,103 | Figure 73: IS-IS Network Map
The following figure shows each device in the IS-IS network with its fully updated link-state database after
the adjacencies have been formed among the neighbor devices. It is applicable to all Level-1 devices in an
area or to all Level-2 devices in a Level-2 subdomain.
Figure 74: IS-IS Dev... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,104 | A Level-2 IS that indicates that it has one or more Level-2 neighbors in other areas may be used by Level-1
devices in the same area as the path of last resort, also called the default route. The Level-2 IS indicates its
attachment to other areas by setting an attached bit (ATT) in its Level-1 LSP 0.
An IS can generate... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,105 | Configure IS-IS
This section describes how to enable and configure the IS-IS process on your system.
Procedure
Step 1 Enable IS-IS Routing Globally, on page 1046.
Step 2 Enable IS-IS Authentication, on page 1050.
Step 3 Configure IS-IS LSP, on page 1053
Step 4 Configure IS-IS Summary Addresses, on page 1057.
Step 5 Con... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,106 | ciscoasa(config-router)#
Step 2 Specify the NET for the routing process:
net network-entity-title
Example:
ciscoasa(config-router)# net 49.1234.aaaa.bbbb.cccc.00
The NET identifies the device for IS-IS. See About NET, on page 1039 for more information on the NET.
Step 3 (Optional) Assign the routing level for the IS-IS... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,107 | case of translational bridging. When hello padding is disabled, the ASA still sends the first five IS-IS hellos
padded to the full MTU size to maintain the benefits of discovering MTU mismatches.
Enter the show clnsinterface command in privileged EXEC mode to show that hello padding has been turned
off at the router le... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,108 | • (Optional) level-1— Sets Level 1 IPv4 or IPv6 metric.
• (Optional) level-2— Sets Level 2 IPv4 or IPv6 metric.
We recommend you use the metric command when you need to change the default metric for all IS-IS
interfaces. This prevents user errors, such as unintentionally removing a set metric from an interface without
... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,109 | maximum-paths number-of-paths
Example:
ciscoasa(config-router)# maximum-paths 8
number-of-paths—The number of routes to install in the routing table. The range is 1 to 8. The default is 1.
The maximum-path command is used to configure IS-IS multi-load sharing when ECMP is configured in
the ASA.
Enable IS-IS Authenticat... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,110 | The password isinserted in Level 1 (station router level)PDU LSPs, CSNPs, andPSNPs. If you do notspecify
the authenticate snp keyword with either the validate or send-only keyword, the IS-IS protocol does not
insert the password into SNPs.
Step 2 Enter IS-IS router configuration mode and configure an IS-IS domain authe... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,111 | ASAs will have more time for the keys to be configured on each ASA if authentication is inserted
only on the packets being sent, not checked on packets being received. After all of the ASAs that
must communicate are configured with this command, enable the authentication mode and key
chain on each ASA.
Note
Step 4 Spec... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,112 | • (Optional) level-2—Enables authentication for Level 2 packets only.
If no password is configured with the key command, no key authentication is performed. Key authentication
can apply to clear text or MD5 authentication. See Step 4 to set the mode. Only one authentication key is
applied to IS-IS at one time. If you c... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,113 | Before you begin
In multiple context mode, complete this procedure in the context execution space. To change from the system
to a context configuration, enter the changeto context name command.
Procedure
Step 1 Enter router configuration mode:
router isis
Example:
ciscoasa(config)# router isis
ciscoasa(config-router)#
... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,114 | lsp-mtu bytes
Example:
ciscoasa(config-router)# lsp-mtu 1300
bytes—The maximum packet size in bytes. The number of bytes must be less than or equal to the smallest
MTU of any link in the network. The range is 128 to 4352.
Step 6 Set the maximum time that LSPs persist in the ASA's database without being refreshed:
max-l... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,115 | ciscoasa(config-router)# lsp-gen-interval level-1 2 50 100
• (Optional) level-1—Apply intervals to Level 1 areas only.
• (Optional) level-2—Apply intervals to Level 2 areas only.
• lsp-max-wait— Indicates the maximum interval between two consecutive occurrences of an LSP being
generated. The range is 1 to 120 seconds. ... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,116 | • (Optional) prc-second-wait—Indicates the interval between the first and second PRC calculation. The
range is 1 to 120,000 milliseconds. The default is 5000 milliseconds (5 seconds).
PRC isthe software process of calculating routes without performing anSPFcalculation. Thisis possible
when the topology of the routing s... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,117 | Example:
ciscoasa(config-router)# summary-address 10.1.0.0 255.255.0.0 tag 100 metric 110
• address—Summary address designated for a range of IP addresses.
• mask—IP subnet mask used for the summary route.
• (Optional) level-1—Only routes redistributed into Level 1 are summarized with the configured address
and mask va... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,118 | passive-interface interface-name
Example:
ciscoasa(config-router)# passive-interface inside
• default—Suppress routing updates on all interfaces.
• management—Suppress updates on Management 0/1 interface.
• management2—Suppress updates on Management 0/2 interface.
• inside—Suppress updates on the inside interface.
This... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,119 | area, except in the case where the associated routing process is performing both Level 1 and Level 2 routing.
See Enable IS-IS Routing Globally, on page 1046 for the procedure.
Procedure
Step 1 Enter interface configuration mode:
interface interface_id
Example:
ciscoasa(config)# interface GigabitEthernet0/0
ciscoasa(co... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,120 | Example:
ciscoasa(config-if)# ipv6 router isis
Step 5 Configure the time-delay between successive IS-IS LSP transmissions per interface:
isis lsp-interval milliseconds
Example:
ciscoasa(config-if)# isis lsp-interval 100
milliseconds—The time delay between successive LSPs. The range is 1 to 4294967298. The default is 33... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,121 | The priority is used to determine which ASA on a LAN will be the designated router or DIS. The priorities
are advertised in the hello packets. The ASA with the highest priority becomes the DIS.
In IS-IS there is no backup designated router. Setting the priority to 0 lowers the chance of this
system becoming the DIS, bu... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
1,122 | Step 11 Set a tag on the IP address configured for an interface when the IP prefix is put into an IS-IS LSP:
isis tag tag-number
Example:
ciscoasa(config-if)# isis tag 100
tag-number—The number that serves as a tag on an IS-IS route. The range is 1 to 4294967295.
No action occurs on a tagged route until the tag is used... | https://www.cisco.com/c/en/us/td/docs/security/asa/asa919/configuration/general/asa-919-general-config.pdf |
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