257
Examples
# Disable IS-IS notification sending.
<Sysname> system-view
[Sysname] undo snmp-agent trap enable isis
summary (IS-IS view)
Use
summary
to configure a summary route.
Use
undo summary
to remove a summary route.
Syntax
summary
ip-address
{
mask-length
|
mask
} [
avoid-feedback
|
generate_null0_route
| [
level-1
|
level-1-2
|
level-2
] |
tag
tag
] *
undo summary
ip-address
{
mask-length
|
mask
} [
level-1
|
level-1-2
|
level-2
]
Default
No summarization is configured.
Views
IS-IS view
Predefined user roles
network-admin
Parameters
ip-address
: Specifies the destination IP address of the summary route.
mask-length
: Specifies the mask length of the summary route, in the range of 0 to 32.
mask
: Specifies the mask of the destination IP address, in dotted decimal notation.
avoid-feedback
: Avoids learning summary routes by route calculation.
generate_null0_route
: Generates the Null 0 route to avoid routing loops.
level-1
: Summarizes only the routes redistributed to Level-1.
level-1-2
: Summarizes the routes redistributed to both Level-1 and Level-2.
level-2
: Summarizes only the routes redistributed to Level-2.
tag
tag
: Specifies a management tag in the range of 1 to 4294967295.
Usage guidelines
If no level is specified, only
level-2
routes are summarized.
If no topology is specified, routes for the base topology are summarized.
You can summarize multiple contiguous networks into a single network to reduce the size of the routing
table, as well as the size of LSP and LSDB generated by the router. You can summarize native IS-IS routes
and redistributed routes. After summarization, the cost of the summary route is the smallest cost of those
summarized routes.
The router summarizes only routes generated from local LSPs.
Examples
# Configure a summary route of 202.0.0.0/8.
