Document No. 10-300090, Issue 1 14-5
Layer 3 Forwarding Cache
ip multicast route-cache readd-timeout Command Mode Global Configuration.
Description This command is useful only for networks that are designed to route
multicast traffic. If the switch is not running IG MP-Only or a multicast
routing protocol on multiple IP interfaces, this command has no useful
effect.
Upon receiving the first frame of a new flow, the forwarding entry cache
software is designed to enter a cache entry in the hardware. If the
forwarding entry cache software continues to receive frames for the same
flow for a certain length of time, the software assumes that the hardware
was unable to install the forwarding entry when last programmed, and will
therefore make a new attempt.
The length of time for which the software waits before attempting to re-add
the forwarding entry is called the readd-timeout. The readd-timeout should
be kept small so that a missed attempt at in st alling a forwarding entry will
be recovered from quickly.
The default timeout is 2 seconds, and the range of adjustment is from 2 to
60 seconds. The no command restores the default setting.
Syntax
To
Configure: ip multicast route-cache readd-timeout <timeout-
interval>
To Re sto re
Default: [no] ip multicast route-cache readd-timeout
Table 14-3. Parameters, Keywords, Arguments
Name Definition
<timeout-interval> Time, in seconds, that the software will wait before
allowing an attempt to re-add a multicast forwarding entry.