Enabling Rip-2 Route Aggregation Function; Setting The Rip Preference; Specifying Rip Version Of The Interface - 3Com 8800 Configuration Manual

3Com Switch 8800 Configuration Guide

18.2.9 Enabling RIP-2 Route Aggregation Function

The so-called route aggregation means that different subnet routes in the same natural
network can be aggregated into one natural mask route for transmission when they are
sent to the outside (i.e. other network). Route aggregation can be performed to reduce
the routing traffic on the network as well as to reduce the size of the routing table.
RIP-1 only sends the route with natural mask, that is, it always sends routes in the route
aggregation form. RIP-2 supports subnet mask and classless interdomain routing. To
advertise all the subnet routes, the route aggregation function of RIP-2 can be disabled.
Perform the following configuration in RIP view.
Table 18-10 Enable RIP-2 route aggregation function
Enable the route aggregation function of RIP-2
Disable the route aggregation function of RIP-2
By default, RIP-2 route summarization is enabled.

18.2.10 Setting the RIP Preference

Each kind of routing protocol has its own preference, by which the routing policy will
select the optimal one from the routes of different protocols. The greater the preference
value is, the lower the preference becomes. The preference of RIP can be set
manually.
Perform the following configuration in RIP view.
Table 18-11 Set the RIP Preference
Set the RIP Preference
Restore the default value of RIP preference
By default, the preference of RIP is 100.

18.2.11 Specifying RIP Version of the Interface

RIP has two versions, RIP-1 and RIP-2. You can specify the version of the RIP packets
processed by the interface.
RIP-1 broadcasts the packets. RIP-2 can transmit packets by both broadcast and
multicast. By default, multicast is adopted for transmitting packets. In RIP-2, the
multicast address is 224.0.0.9. The advantage of transmitting packets in the multicast
mode is that the hosts not operating RIP in the same network can avoid receiving RIP
Operation
Operation
18-8
Chapter 18 RIP Configuration
Command
summary
undo summary
Command
preference value
undo preference