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show isis neighbors
Display information about neighboring (adjacent) routers.
Syntax
show isis neighbors [level-1 | level-2] [detail] [interface]
Parameters
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 slot/port or number information:
● For a Port Channel interface, enter the keywords port-channel then a
number. The range is from 1 to 128.
● For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port information.
● For a VLAN, enter the keyword vlan then a number from 1 to 4094.
Command Modes
● EXEC
● EXEC Privilege
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
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.
Dell#show isis neighbors
System Id Interface State Type Priority Uptime Circuit Id
TEST Gi 7/1 Up L1L2(M) 127 09:28:01 TEST.02
!
Dell#show isis neighbors detail
System Id Interface State Type Priority Uptime Circuit Id
TEST Gi 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 )
716 Intermediate System to Intermediate System (IS-IS)