Configuring Route Summarization; Configuring Default Route Generation; Configuring Protocol Priority - H3C S7500 Series Operation Manual

Operation Manual – Routing Protocol
H3C S7500 Series Ethernet Switches

5.3.10 Configuring Route Summarization

You can configure the routes having the same IP prefix as one summarized route.
Follow these steps to configure route summarization:
Enter system view
Enter IS-IS view
Configure route
summarization

5.3.11 Configuring Default Route Generation

In an IS-IS routing domain, a Level-1 router maintains the LSDB for the local area only
and generates the routes within the local area only. A Level-2 router maintains the
LSDB for the backbone within the IS-IS routing domain and generates the routes for
the backbone only. To transfer packets to another area, a Level-1 router in an area
needs to first transfer the packets to the nearest Level-1-2 router within the local area.
This requires the default route at Level-1.
Follow these steps to configure default route generation:
Enter system view
Enter IS-IS view
Configure default route
generation

5.3.12 Configuring Protocol Priority

For a router running multiple routing protocols, routing information needs to be shared
and selected by the routing protocols. The system assigns a priority for each routing
protocol. When multiple routing protocols discover a route to the same destination,
the protocol with the highest priority will dominate.
Follow these steps to configure protocol priority:
To do...
system-view
isis [ tag ]
summary ip-address
ip-mask [ level-1 |
level-1-2 | level-2 ]
To do...
system-view
isis [ tag ]
default-route-advertise
[ route-policy
route-policy-name ]
Use the command...
Use the command...
5-13
Chapter 5 IS-IS Configuration
Remarks
—
—
Required
By default, the system
performs no route
summarization.
Remarks
—
—
Required
The default route is
advertised to only the
routers at the same level.