CLI Guide

isis hello-interval
Specify the length of time between hello packets sent.
Syntax
isis hello-interval seconds [level-1 | level-2]
To return to the default values, use the no isis hello-interval [seconds]
[level-1 | level-2] command.
Parameters
seconds Allows you to set the length of time between hello packet
transmissions. The range is from 1 to 65535. The default is
10.
level-1 (OPTIONAL) Select this value to configure the hello interval
for Level 1. This value is the default.
level-2 (OPTIONAL) Select this value to configure the hello interval
for Level 2.
Defaults seconds = 10; level-1 (if not otherwise specified)
Command Modes INTERFACE
Command History
This guide is platform-specific. For command information about other platforms,
see the relevant Dell Networking OS Command Line Reference Guide.
Version Description
9.8(2.0) Introduced on the S3100 series.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.5(0.1) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.3.11.1 Introduced on the Z9000.
Usage Information
Hello packets are held for a length of three times the value of the hello interval. To
conserve bandwidth and CPU usage, use a high hello interval seconds. Use a low
hello interval seconds for faster convergence (but uses more bandwidth and CPU
resources).
Related
Commands
• isis hello-multiplier — specify the number of IS-IS hello packets a neighbor
must miss before the router declares the adjacency as down.
984
Intermediate System to Intermediate System (IS-IS)