3Com Switch 7750 Configuration Guide Guide

280 CHAPTER 33: RIP CONFIGURATION
Configuring RIP route summary
Route summary means that different subnet routes in the same natural network
segment can be aggregated into one route with a natural mask for transmission to
another network segment. This function is used to reduce the routing traffic on
the network as well as to reduce the size of the routing table.
Route summary does not work for RIP-1. RIP-2 supports route summary. When it is
needed to advertise all subnet routes, you can disable the function for RIP-2.
Disabling the receiving of host routes
In some special cases, the router can receive a lot of host routes from the same
segment, and these routes are of little help in route addressing but consume a lot
of network resources. After host route receiving is disabled, a router can refuse
any incoming host routes.
Configuring RIP to filter or advertise the received routes
The route filtering function provided by a router enables you to configure
inbound/outbound filter policy by specifying an ACL or address prefix list to make
RIP filter incoming/outgoing routes. Besides, you can configure RIP to receive only
the RIP packets from a specific neighbor.
Tabl e 200 Configure RIP route summary
Operation Command Description
Enter system view system-view -
Enter RIP view rip -
Enable RIP-2 automatic route
summary
summary
Optional
By default, RIP-2 automatic
route summary is enabled.
Tabl e 201 Disable the receiving of host route
Operation Command Description
Enter system view system-view -
Enter RIP view rip -
Disable the receiving of host
routes
undo host-route
Optional
By default, the router receives
host routes.
Tabl e 202 Configure RIP to filter incoming/outgoing routes
Operation Command Description
Enter system view system-view -
Enter RIP view rip -