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DES-7200 Configuration Guide Chapter 3 RIPng
Configuration
3-3
routing table becomes invalid upon no update;
Route clearing time (second): upon expiration of this time, the route will be
removed from the routing table.
By adjusting the aforementioned times, the convergence time and failure
recovery time of routing protocol can be accelerated. To adjust RIPng timer, input
the following command in the RIPng routing process configuration mode:
Command Function
DES-7200(config-router)# times
update invalid garbage-collection
Adjust RIPng times.
The following example adjusts the values of three RIPng times:
DES-7200(config-router)# timers 10 30 90
Caution
Consistency of RIPng times is mandatory for routing devices in the same
network.
3.2.4 Configure Split Horizon
When multiple routing devices are linked to the IP broadcast network and running
distance-vector routing protocol, it is necessary to adopt the mechanism of split
horizon to avoid loop. Split horizon can prevent routing device from sending
routing information to the port from which such routing information was learned.
Such mechanism optimizes the routing information exchange between multiple
routing devices.
However, for non-broadcast multiple-access network (such as frame relay, X.25
network), split horizon may cause disable certain routing devices from learning all
routing information. In such a case, the split horizon will need to be disabled.
To disable or enable split horizon, input the following command in the routing
process configuration mode:
Command Function
DES-7200(config-router)# no
split-horizon
Disable split horizon.
DES-7200(config-router)#
split-horizon
Enable split horizon.
By default, split horizon is enabled on all RIPng ports.