Concept Guide

To disable adjacency check, use the no adjacency-check command.
Defaults Enabled.
Command Modes
• ROUTER ISIS (for IPv4)
• CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (for IPv6)
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information To perform protocol-support consistency checks on hello packets, use this command. The adjacency-check is
enabled by default.
advertise
Leak routes between levels (distribute IP prexes between Level 1 and Level 2 and vice versa).
Syntax
advertise {level1-into-level2 | level2-into-level1} prefix-list-name
To return to the default, use the no advertise {level1-into-level2 | level2-into-level1}
[prefix-list-name] command.
Parameters
level1-into-level2 Enter the keywords level1-into-level2 to advertise Level 1 routes into Level 2
LSPs. This setting is the default.
level2-into-level1 Enter the keywords level2-into-level1 to advertise Level 2 inter-area routes into
Level 1 LSPs. This behavior is described in RFC 2966.
prex-list-name Enter the name of a congured IP prex list. Routes meeting the criteria of the IP Prex
list are leaked.
Defaults level1-into-level2 (Level 1 to Level 2 leaking enabled.)
Command Modes
• ROUTER ISIS (for IPv4)
• CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (for IPv6)
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
You cannot disable leaking from one level to another; however, you can regulate the rate ow from one level to
another using an IP Prex list. If you do not congure the IP Prex list, all routes are leaked.
You can nd more information in IETF RFC 2966, Domain-wide Prex Distribution with Two-Level IS-IS.
Intermediate System to Intermediate System (IS-IS) 769