3com S7906E Manuel De Montage
1-21
To do…
Use the command…
Remarks
Enter system view
system-view
––
Enter IS-IS view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
vpn-instance-name ]
––
Specify a priority for IS-IS
preference { route-policy route-policy-name
| preference } *
| preference } *
Required
15 by default
Configuring the Maximum Number of Equal Cost Routes
If there are multiple equal cost routes to the same destination, the traffic can be load balanced to
enhance efficiency.
Follow these steps to configure the maximum number of equal cost routes:
To do…
Use the command…
Remarks
Enter system view
system-view
––
Enter IS-IS view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
vpn-instance-name ]
––
Specify the maximum number
of equal cost routes for load
balancing
of equal cost routes for load
balancing
maximum load-balancing number
Required
The number range and
default vary by device.
default vary by device.
Configuring IS-IS Route Summarization
This task is to configure a summary route, so routes falling into the network range of the summary route
are summarized into one route for advertisement. Doing so can reduce the size of routing tables, as well
as the scale of LSP and LSDB. Both IS-IS routes and redistributed routes can be summarized.
Follow these steps to configure route summarization:
To do…
Use the command...
Remarks
Enter system view
system-view
—
Enter IS-IS view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
vpn-instance-name ]
––
Configure IS-IS
route
summarization
route
summarization
summary ip-address { mask |
mask-length } [ avoid-feedback |
generate_null0_route | tag tag | [ level-1 |
level-1-2 | level-2 ] ] *
mask-length } [ avoid-feedback |
generate_null0_route | tag tag | [ level-1 |
level-1-2 | level-2 ] ] *
Required
No route summarization is
configured by default.
configured by default.
z
The cost of the summary route is the lowest one among the costs of summarized routes.
z
The router summarizes only the routes in the locally generated LSPs.