H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv4 Routing
H3C S7500E Series Ethernet Switches Chapter 4 IS-IS Configuration
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the size of routing tables, as well as the LSP and LSDB generated by the router itself.
Both IS-IS 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 ] ––
Configure IS-IS route
summarization
summary ip-address { mask |
mask-length } [ avoid-feedback |
generate_null0_route | tag tag |
[ level-1 | level-1-2 | level-2 ] ] *
Required
Not configured by
default
 Note:
The cost of the summary route is the lowest cost among those summarized routes.
4.4.6 Advertising a Default Route
Follow these steps to advertise a default route:
To do… Use the command… Remarks
Enter system view
system-view
––
Enter IS-IS view isis [ process-id ] —
Advertise a default
route
default-route-advertise
[ route-policy
route-policy-name ] [ level-1 |
level-2 | level-1-2 ]
Optional
Level-2 router generates
a default route by default.
 Note:
The default route is only advertised to routers at the same level. You can use a routing
policy to generate the default route only when a local routing entry is matched by the
policy.
4.4.7 Configuring Inbound Route Filtering
Follow these steps to configure inbound route filtering: