Administrator Guide

Only configure interfaces as Level 1 or Level 2 on routers that are between areas (for example, a Level 1-2
router) to prevent the software from sending unused hello packets and wasting bandwidth.
isis csnp-interval
Configure the IS-IS complete sequence number PDU (CSNP) interval on an interface.
C9000 Series
Syntax
isis csnp-interval seconds [level-1 | level-2]
To return to the default values, use the no isis csnp-interval [seconds] [level-1 |
level-2] command.
Parameters
seconds Interval of transmission time between CSNPs on multi-access networks for the
designated intermediate system. The range is from 0 to 65535. The default is 10.
level-1 (OPTIONAL) Independently configures the interval of time between transmission of
CSNPs for Level 1.
level-2 (OPTIONAL) Independently configures the interval of time between transmission of
CSNPs 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, 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
9.9(0.0) Introduced on the C9010.
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
The default values of this command are typically satisfactory transmission times for a specific interface on
a designated intermediate system. To maintain database synchronization, the designated routers send
CSNPs.
You can configure Level 1 and Level 2 CSNP intervals independently.
isis hello-interval
Specify the length of time between hello packets sent.
C9000 Series
Syntax
isis hello-interval seconds [level-1 | level-2]
Intermediate System to Intermediate System (IS-IS) 833