|
Command or Action |
Purpose |
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
- Enter your password if prompted.
|
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode. |
|
router isis area-tag
Example:
Router(config)# router isis area2
|
Enables IS-IS for the specified IS-IS routing process, and enters router configuration mode. |
|
address-family ipv6 [unicast | multicast]
Example:
Router(config-router)# address-family ipv6
|
Specifies the IPv6 address family, and enters address family configuration mode.
- The unicast keyword specifies the unicast IPv6 unicast address family. By default, the router is placed in configuration mode for the unicast IPv6 address family if the unicast keyword is not specified with the address-family ipv6 command.
|
|
default-information originate [route-map map-name]
Example:
Router(config-router-af)# default-information originate
|
(Optional) Injects a default IPv6 route into an IS-IS routing domain.
- The route-map keyword and map-name argument specify the conditions under which the IPv6 default route is advertised.
- If the route map keyword is omitted, then the IPv6 default route will be unconditionally advertised at Level 2.
|
|
distance value
Example:
Router(config-router-af)# distance 90
|
(Optional) Defines an administrative distance for IPv6 IS-IS routes in the IPv6 routing table.
- The valueargument is an integer from 10 to 254. (The values 0 to 9 are reserved for internal use).
|
|
maximum-paths number-paths
Example:
Router(config-router-af)# maximum-paths 3
|
(Optional) Defines the maximum number of equal-cost routes that IPv6 IS-IS can support.
- This command also supports IPv6 Border Gateway Protocol (BGP) and Routing Information Protocol (RIP).
- The number-paths argument is an integer from 1 to 64. The default for BGP is one path; the default for IS-IS and RIP is 16 paths.
|
|
summary-prefix ipv6-prefix prefix-length level-1 | level-1-2| level-2]
Example:
Router(config-router-af)# summary-prefix 2001:DB8::/24
|
(Optional) Allows a Level 1-2 router to summarize Level 1 prefixes at Level 2, instead of advertising the Level 1 prefixes directly when the router advertises the summary.
- The ipv6-prefix argument in the summary-prefix command must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons.
- The prefix-length argument is a decimal value that indicates how many of the high-order contiguous bits of the address comprise the prefix (the network portion of the address). A slash mark must precede the decimal value.
|
|
prc-interval seconds [initial-wait] [secondary-wait
Example:
Router(config-router-af)# prc-interval 20
|
(Optional) Configures the hold-down period between PRCs for multitopology IS-IS for IPv6. |
|
spf-interval [level-1 | level-2] seconds initial-wait] [secondary-wait
Example:
Router(config-router-af)# spf-interval 30
|
(Optional) Configures how often Cisco IOS software performs the SPF calculation for multitopology IS-IS for IPv6. |
|
exit
Example:
Router(config-router-af)# exit
|
Exits address family configuration mode, and returns the router to router configuration mode.
- Repeat this step to exit router configuration mode and return the router to global configuration mode.
|
|
interface type number
Example:
Router(config-router)# interface Ethernet 0/0/1
|
Specifies the interface type and number, and enters interface configuration mode. |
|
isis ipv6 metric metric-value [level-1 | level-2 | level-1-2
Example:
Router(config-if)# isis ipv6 metric 20
|
(Optional) Configures the value of an multitopology IS-IS for IPv6 metric. |