Dell Command Line Reference Guide for the S4048–ON System 9.14.2.8

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show isis neighbors

Display information about neighboring (adjacent) routers.

Syntax
show isis [vrf vrf-name] neighbors [level-1 | level-2] [detail] [interface]
Parameters
vrf vrf-name
(OPTIONAL) Enter the keyword vrf followed by the name of the VRF to display adjacent router information corresponding to that VRF.
level-1
(OPTIONAL) Displays information about Level 1 IS-IS neighbors.
level-2
(OPTIONAL) Displays information about Level 2 IS-IS neighbors.
detail
(OPTIONAL) Displays detailed information about neighbors.
interface
(OPTIONAL) Enter the following keywords and the interface information:
  • For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port[/subport] information.
  • For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information.
  • For a port channel interface, enter the keywords port-channel then a number.
  • For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.
Command Modes
  • EXEC
  • EXEC Privilege
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)
Added support for VRF. 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.
Usage Information

Use this command to confirm that the neighbor adjacencies are operating correctly. If you suspect that they are not, you can verify the specified area addresses of the routers by using the show isis neighbors command.

The following describes the show isis neighbors command shown in the following example.
Field
Description
System Id
The value that identifies a system in an area.
Interface
The interface, slot, and port in which the router was discovered.
State
The value providing status about the adjacency state. The range is Up and Init.
Type
This value displays the adjacency type (Layer 2, Layer 2 or both).
Priority
IS-IS priority the neighbor advertises. The neighbor with highest priority becomes the designated router for the interface.
Uptime
Displays the interfaces uptime.
Circuit Id
The neighbor’s interpretation of the designated router for the interface.
Example

The bold sections below identify that Multi-Topology IS-IS is enabled. This command displays only one IP address per line.

DellEMC# show isis neighbors
System Id Interface State Type Priority Uptime Circuit Id
TEST Te 7/1 Up L1L2(M) 127 09:28:01 TEST.02
!
DellEMC#show isis neighbors detail
System Id Interface State Type Priority Uptime Circuit Id
TEST Te 7/1 Up L1L2(M) 127 09:28:04 TEST.02 Area Address(es):
49.0000.0001
  IP Address(es): 25.1.1.3*
  MAC Address: 0000.0000.0000
  Hold Time: 28
  Link Local Address: fe80::201:e8ff:fe00:492c
  Topology: IPv4 IPv6 , Common (IPv4 IPv6 )
  Adjacency being used for MTs: IPv4 IPv6
DellEMC#

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