Service Manual
Usage Information
The default values of this command are typically satisfactory transmission times for a specic interface on a
designated intermediate system. To maintain database synchronization, the designated routers send CSNPs.
You can congure Level 1 and Level 2 CSNP intervals independently.
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 congure the hello interval for Level 1. This value
is the default.
level-2 (OPTIONAL) Select this value to congure the hello interval for Level 2.
Defaults seconds = 10; level-1 (if not otherwise specied)
Command Modes INTERFACE
Command History
This guide is platform-specic. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.8(0.0) Introduced on the S3048-ON and S4048-ON.
9.7(0.0) Introduced on the S6000-ON.
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 — species the number of IS-IS hello packets a neighbor must miss before the router
declares the adjacency as down.
810
Intermediate System to Intermediate System (IS-IS)