Administrator Guide

level-2-only You can form a Level 2 adjacencies when other Level 2 or
Level 1-2 routers and their interfaces are configured for Level
1-2 or Level 2. Level 1 adjacencies cannot be established on
this interface.
Defaults level-1-2
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 9.0.2.0 Introduced on the S6000.
Version
8.3.19.0
Introduced on the S4820T.
Version
8.3.12.0
Introduced on the S4810.
Version 8.3.11.1 Introduced on the Z9000.
Usage
Information
Because the default establishes Level 1 and Level 2 adjacencies, you do not need to
configure this command. Routers in an IS-IS system must be configured as a Level
1-only, Level 1-2, or Level 2-only system.
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.
Z9000
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.
Intermediate System to Intermediate System (IS-IS)
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