407
Syntax
ipv6 summary
ipv6-prefix prefix-length
[
avoid-feedback
|
generate_null0_route
| [
level-1
|
level-1-2
|
level-2
] |
tag
tag
] *
undo ipv6 summary
ipv6-prefix prefix-length
[
level-1
|
level-1-2
|
level-2
]
Default
No summary route is configured.
Views
IS-IS view
Predefined user roles
network-admin
Parameters
ipv6-prefix:
Specifies an IPv6 prefix for the summary route.
prefix-length
: Specifies the length of the IPv6 prefix, in the range of 0 to 128.
avoid-feedback
: Avoids learning the summary route by route calculation.
generate_null0_route
: Generates a NULL 0 route to avoid routing loops.
level-1
: Summarizes only the routes redistributed to Level-1.
level-1-2
: Summarizes all the routes redistributed to both Level-1 and Level-2.
level-2
: Summarize only the routes redistributed to Level-2.
tag
: Specifies an administrative tag in the range of 1 to 4294967295.
Usage guidelines
If no level is specified, the command applies to Level-2.
You can summarize routes with the same next hop into a single route to reduce the size of the routing
table, as well as the size of the LSDB. This command can summarize both learned and redistributed IPv6
IS-IS routes. The cost of the summary route is the smallest cost of those summarized routes.
Examples
# Configure a summary route of 2002::/32.
<Sysname> system-view
[Sysname] isis
[Sysname-isis-1] ipv6 summary 2002:: 32
isis ipv6 bfd enable
Use
isis ipv6 bfd enable
to enable BFD for IPv6 IS-IS.
Use
undo
isis ipv6
bfd enable
to disable BFD for IPv6 IS-IS.
Syntax
isis ipv6 bfd enable
undo
isis ipv6 bfd enable
Default
BFD for IPv6 IS-IS is disabled.