3Com 5500-SI Configuration Manual page 227

3Com does not recommend the use of this command, because the destination
address does not need to receive two copies of the same message at the same time.
Note that should be restricted using the following commands:
peer
, and
output rip input
Specifying the RIP Version
RIP has two versions, RIP-1 and RIP-2. You can specify the version of the RIP packet
used 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
default multicast address is 224.0.0.9. The advantage of transmitting packets in
multicast mode is that the hosts in the same network that do not run RIP, do not
receive RIP broadcast packets. In addition, this mode prevents the hosts that are
running RIP-1 from incorrectly receiving and processing the routes with subnet masks
in RIP-2. When an interface is running RIP-2, it can also receive RIP-1 packets.
Perform the following configuration in Interface View.
Table 205 Specifying RIP Version of the Interface
Operation
Specify the interface version as RIP-1
Specify the interface version as RIP-2
Restore the default RIP version running
on the interface
By default, the interface receives and sends the RIP-1 packets. It transmits packets in
multicast mode when the interface RIP version is set to RIP-2.
Configuring RIP Timers
As stipulated in RFC1058, RIP is controlled by three timers: period update, timeout,
and garbage-collection:
Period update is triggered periodically to send all RIP routes to all neighbors.
■
If an RIP route has not been updated when the timeout timer expires, the route is
■
considered unreachable.
If the garbage-collection timer expires before the unreachable route is updated by
■
the update packets from the neighbors, the route will be deleted completely from
the routing table.
Modification of these timers can affect the convergence speed of RIP.
Perform the following configuration in RIP View.
Table 206 Configuring RIP timers
Operation
Configure RIP timers
Restore the default settings of RIP
The modification of RIP timers is validated immediately.
.
network
Command
rip version 1
rip version 2 [ broadcast | multicast ]
undo rip version
Command
timers { update update_timer_length |
timeout timeout_timer_length } *
undo timers { update | timeout } *
RIP 227
,
rip work rip