User Manual

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Users Manual of XGS-6350-24X4C
recovery is needed. To adjust the timer, run the following command in RIPng configuration mode:
Command Purpose
timers holddown value
Means how long it takes for a route to be
removed from the routing table.
timers garbagevalue
Means how long it takes for a route to be
declared invalid.
timers updatevalue
Means the transmission frequency of routing
updates, whose unit is second.
53.1.3.9 Summarizing the Routes Manually
RIPng must summarize the routing information manually to reduce the number of the routes that interact with
neighbors. To summarize the routing information, run the following command in the RIPng configuration
mode:
Command Purpose
aggregate-address
ipv6-prefix/prefixlen
Summarizes the routing information.
53.1.3.10 Activating or Forbidding Horizontal Fragmentation
In normal cases, a router that connects the broadcast IPv6 network and uses the distance vector routing
protocol takes the horizontal fragmentation to reduce the possibility of route loopback. The horizontal
fragmentation blocks the routing information from being declared to the interface that receives this routing
information. In this way the communication between multiple routers can be optimized, especially when the
loopback is broken. However, this solution is not so good to those un-broadcast networks. In these networks,
you have to forbid horizontal fragmentation.
To activate or disable horizontal fragmentation, run the following commands in VLAN configuration mode:
Command Purpose
Ipv6 rip split-horizon
Activates horizontal fragmentation.
no ipv6 rip split-horizon
Forbids horizontal fragmentation.
By default, horizontal fragmentation is activated on those point-to-point interfaces and forbidden on those
point-to-multipoint interfaces.
In normal cases, you are not recommended to change the default state unless you
are sure that the routes can be correctly declared after the state of your application
program is changed. If horizontal fragmentation is forbidden on a serial interface
that connects a packet switching network, you have to disable horizontal
fragmentation on routers of any related multicast group on a network.
53.1.3.11 Monitoring and Maintaining RIPng
Through monitoring and maintaining RIPng, you can get the statistic information of a network, including the