3com 2500 User Guide

Configuring RIP 10-21

The poison reverse mode allows you to prevent a routing loop if a route is 
advertised on the interface on which it came in. Poison reverse has two 
modes: 

■

enabled — On the interface on which a route came in, RIP advertises 
that the route is unavailable. Because the originating router does not 
overwrite its routing table entry, a routing loop does not occur.

■

disabled — RIP does not advertise that a route is unavailable.

To set the poison reverse mode, from the top level of the Administration 
Console, enter:

Example:

Select interfaces (1-2|all):2

Enter RIP poison reverse mode (disabled,enabled) [enabled]:

The default poison reverse mode is enabled.

The system uses this IP address when it advertises routes to other stations 
on the same subnetwork. In particular, the system uses this address for 
sending RIP updates. 

By default, the system uses a directed advertisement (all 

s in the host 

field).

To add an RIP advertisement address to an IP interface:

1 From the top level of the Administration Console, enter:

2 Enter the RIP advertisement addresses that you want to add.

system
ethernet
fddi
atm
bridge

➧

ip
ipx
appletalk
snmp
analyzer
script
logout

interface
route
arp
atmArpServer
multicast
udpHelper
routing
icmpRouterDiscery
ospf

➧

rip
ping
statistics

display
mode
cost

➧

poisonReverse
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statistics

system
ethernet
fddi
atm
bridge

➧

ip
ipx
appletalk
snmp
analyzer
script
logout

interface
route
arp
atmArpServer
multicast
udpHelper
routing
icmpRouterDiscovery
ospf

➧

rip
ping
statistics

display
mode
cost
poisonReverse

➧

addAdvertisement
removeAdvertisement
statistics