Reference Guide

isis circuit-type
Configure the adjacency type on interfaces.
S5000
Syntax
isis circuit-type {level-1 | level-1-2 | level-2-only}
To return to the default values, use the no isis circuit-type command.
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 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
Version 9.0(1.3) Introduced on the S5000.
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.
S5000
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.
Intermediate System to Intermediate System (IS-IS)
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