Command Reference Guide

Intermediate System to Intermediate System (IS-IS) | 881
Parameters
Defaults
seconds = 10; level-1 (if not otherwise specified)
Command Modes
INTERFACE
Command
History
Usage
Information
Hello packets are held for a length of three times the value of the hello interval. Use a high hello
interval seconds to conserve bandwidth and CPU usage. Use a low hello interval seconds for faster
convergence (but uses more bandwidth and CPU resources).
Related
Commands
isis hello-multiplier
e
Specify the number of IS-IS hello packets a neighbor must miss before the router declares the
adjacency down.
Syntax
isis hello-multiplier multiplier [level-1 | level-2]
To return to the default values, enter no isis hello-multiplier [multiplier] [level-1 | level-2].
Parameters
Defaults
multiplier =3; level-1 (if not otherwise specified)
Command Modes
INTERFACE
Command
History
Usage
Information
The holdtime (the product of the hello-multiplier multiplied by the hello-interval) determines how long
a neighbor waits for a hello packet before declaring the neighbor is down so routes can be recalculated.
seconds
Allows you to set the length of time between hello packet transmissions.
Range: 1 to 65535
Default: 10
level-1
(OPTIONAL) Select this value to configure the hello interval for Level 1.
This is the default.
level-2
(OPTIONAL) Select this value to configure the hello interval for Level 2.
Version 8.3.12.0 Introduced on S4810
isis hello-multiplier Specifies the number of IS-IS hello packets a neighbor must miss before the
router should declare the adjacency as down.
multiplier
Specifies an integer that sets the multiplier for hello holding time.
Never configure a hello-multiplier lower then the default (3).
Range: 3 to 1000
Default: 3
level-1
(OPTIONAL) Select this value to configure the hello multiplier independently for Level 1
adjacencies.
This is the default.
level-2
(OPTONAL) Select this value to configure the hello multiplier independently for Level 2
adjacencies.
Version 8.3.12.0 Introduced on S4810