Dell Command Line Reference Guide for the S4048–ON System 9.14.2.5

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adjacency-check

Verify that the “protocols supported” field of the IS-IS neighbor contains matching values to this router.

Syntax
adjacency-check

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)
Command History

This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC Networking OS Command Line Reference Guide.

Version
Description
9.10(0.1)
Introduced on the S6010-ON and S4048T-ON.
9.10(0.0)
Introduced on the S3148.
9.10(0.0)
Introduced on the S6100–ON.
9.8(2.0)
Introduced on the S3100 series.
9.8(1.0)
Introduced on the Z9100–ON.
9.8(0.0P5)
Introduced on the S4048-ON.
9.8(0.0P2)
Introduced on the S3048-ON.
9.7(0.0)
Introduced on the S6000-ON.
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.
7.5.1.0
Introduced on the E-Series.
Usage Information
To perform protocol-support consistency checks on hello packets, use this command. The adjacency-check is enabled by default.

If a BFD session goes down indicating that IPv4 or IPv6 connectivity to its neighbor is lost, it does not imply that the adjacency is lost altogether. The hello adjacency runs over Layer 2, and does not require IP connectivity. However, if IPv4 connectivity is lost to a neighbor, then when the next SPF calculation is performed, the system ensures that it does not calculate any IPv4 or IPv6 routes through that neighbor.


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