H3C S7500E Series Command Manual page 305

Command Manual – IPv4 Routing
H3C S7500E Series Ethernet Switches
2.1.30 timers
Syntax
timers { garbage-collect garbage-collect-value | suppress suppress-value | timeout
timeout-value | update update-value }*
undo timers { garbage-collect | suppress | timeout | update } *
View
RIP view
Parameters
garbage-collect-value: Garbage-collect timer time in seconds, in the range of 1 to 3600.
suppress-value: Suppress timer time in seconds, in the range of 0 to 3600.
timeout-value: Timeout timer time in seconds, in the range of 1 to 3600.
update-value: Update timer time in seconds, in the range of 1 to 3600.
Description
Use the timers command to configure RIP timers. By adjusting RIP timers, you can
improve network performance.
Use the undo timers command to restore the default.
By default, the garbage-collect timer is 120 seconds, the suppress timer 120 seconds,
the timeout timer 180 seconds, and the update timer 30 seconds.
RIP is controlled by the above four timers.
The update timer defines the interval between routing updates.
The timeout timer defines the route aging time. If no routing update related to a
route is received after the aging time, the metric of the route is set to 16 in the
routing table.
The suppress timer defines how long a RIP route stays in the suppressed state.
When the metric of a route is 16, the route enters the suppressed state. In the
suppressed state, only routes which come from the same neighbor and whose
metric is less than 16 will be received by the router to replace unreachable routes.
The garbage-collect timer defines the interval from when the metric of a route
becomes 16 to when it is deleted from the routing table. During the
Garbage-Collect timer length, RIP advertises the route with the routing metric set
to 16. If no routing update is announced for that route after the Garbage-Collect
timer expires, the route will be deleted from the routing table.
Note that:
Generally, you are not recommended to change the default values of these timers.
The time lengths of these timers must be kept consistent on all routers and access
servers in the network.
Chapter 2 RIP Configuration Commands
2-27