AI2524 Router Card User’s Manual
Page 9-30 August 1997
2524UM
Configure IS-IS Interface Parameters
Cisco's IS-IS implementation allows you to customize certain inter-
face-specific IS-IS parameters:
zAdjust IS-IS Link-State Metrics
zSet the Advertised Hello Interval a nd H e llo Multiplier
zSet the Advertised CSNP In terval
zSet the Retransmission Interval
zSpecify Designated Router Election
zSpecify the Interface Circuit Type
zConfigure IS-IS Authentication Passwords
You are not required to alter any of these parameters, but some inter
face parameters must be consistent across all routers in the network.
Therefore, if you do configure any of these parameters, be sure the
configurations for all routers on the netw ork have compatible values.
Adjust IS-IS Link-State Metrics
You can configure a cost for a specified interface. The default metric
is used as a value for the IS-IS metric. This is the value as si gned when
there is no quality of service (QOS) routing perfor med. The only met-
ric that is supported by the Cisco IOS software and that you can con-
figure is the default-metric, which you can confi gure for L evel1 or
Level 2 routing or both.
In interface configuration mode, configure the link state metric:
isis metric

default-metric

{level-1 |
level-2}
Set the Advertised Hello Interval and Hello Multiplier
You can specify the length of time (in seconds) between hello packets
that the Cisco IOS software sends on the interface. You can also
change the default hello packet multiplier used on t he i nt e r face to de-
termine the hold time transmitted in IS-IS hello packets (the default is
3).
The hold time determines how long a neighbor waits for another hello
packet before d ecla ri n g t he n e igh bor d own. This time determine s how