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DES-7200 Configuration Guide Chapter 2 RIP
Configuration
2-12
Caution
1. This feature can be used in the following cases: 1) the interface is
connected to only one neighbor; 2) the interface is connected to multiple
neighbors using unicast communication mode. It is suggested to enable this
feature on PPP, frame relay, X.25 and similar link layer protocols.
2. It is suggested to enable split horizon with poisoned reverse on
TRIP-enabled interface, or else there may be residual invalid routing
information.
3. It shall be guaranteed that the feature is enabled on all routers on the same
link, or else the feature may fail and routing information cannot be exchanged
properly.
4. This feature cannot be used together with BFD for RIP;
5. When this feature is enabled, make sure the RIP configurations on both ends
of the link are identical, such as RIP authentication, version of RIP protocol
supported by the interface and etc.
To enable or disable this feature, execute the following commands in interface
configuration mode:
Command Function
DES-7200(config-if)# ip rip
triggered
Enable Triggered RIP.
DES-7200(config-if)# no ip rip
triggered
Disable Triggered RIP.
2.2.15 Configuring RIP Graceful Restart
RIP Graceful Restart (GR) guarantees non-stop data forwarding during the
process of protocol restart. When RIP GR is enabled on the router, the forwarding
table will be maintained during the process of RIP restart, and requests will be
sent to neighbors to relearn routes in order to complete route re-convergence
within the period of graceful restart. Upon expiration of grace period, GR will exit
and forwarding table entries will be updated and advertised to neighbors.
Grace period is the maximum duration from RIP GR execution to RIP GR
completion. During this period, the forwarding table will be maintained and RIP
route recovery will be executed in order to restore RIP to the state before graceful
restart. Upon expiration of grace period, RIP will exit GR state and execute
common RIP operations.
graceful-restart grace-period Allows the user to explicitly change the restart
period. Please note that GR must be completed within the RIP invalid timer and
one RIP route update cycle is completed. If this value is not properly configured,
non-stop data forwarding cannot be guaranteed during graceful restart. For
example: if the grace period is larger than the invalid timer of neighbor and GR is