Deployment Guide

Parameters
level-1 You can form a Level 1 adjacency if there is at least one common area address
between this system and neighbors. You cannot form Level 2 adjacencies on this
interface.
level-1-2 You can form a Level 1 and Level 2 adjacencies when the neighbor is also
configured as Level-1-2 and there is at least one common area, if not, a Level 2
adjacency is established. This setting is the default.
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 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
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.
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
828 Intermediate System to Intermediate System (IS-IS)