CCNA Cisco Certified Network Associate Study Guide - FTP Server

Verifying Your Configurations 277
The router output below shows the IGRP routing information. The
default update timer is 90 seconds by default, and the administrative distance
is 100.
Routing Protocol is "igrp 10"
Sending updates every 90 seconds, next due in 42 seconds
Invalid after 270 seconds, hold down 280, flushed after
630
Outgoing update filter list for all interfaces is
Incoming update filter list for all interfaces is
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
IGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
IGRP maximum hopcount 100
IGRP maximum metric variance 1
Redistributing: eigrp 10, igrp 10
Routing for Networks:
172.16.0.0
Routing Information Sources:
Gateway Distance Last Update
172.16.40.2 100 00:00:47
172.16.20.1 100 00:01:18
Distance: (default is 100)
The information included in the show ip protocols command includes
the AS, routing timers, networks being advertised, gateways, and administrative
distance (100).
The invalid timer is set at 270 seconds; it is three times the update timer.
If a router update is not received in three update periods, the route is considered
invalid. The holddown timer is 280, which is around three times the
update timer. This is the number of seconds a route is suppressed while waiting
for a new update to be received. If a new update is not received before the
holddown timer expires, the flush timer will start. When the flush timer
expires, the route is removed from the router.