Reference Guide
Intermediate System to Intermediate System (IS-IS) | 945
Parameters
Command Modes
EXEC
EXEC Privilege
Command
History
Example
Figure 29-8. Command Example: show isis neighbors 
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) Identifies the interface type slot/port as one of the following:
• For a Gigabit Ethernet interface, enter the keyword 
GigabitEthernet followed by 
the slot/port information. 
• For a Port Channel interface, enter the keyword port-channel followed by a 
number:
C-Series and S-Series Range: 1-128
E-Series Range: 1 to 32 for EtherScale, 1 to 255 for TeraScale and 1 to 512 for 
ExaScale. 
• For a SONET interface, enter the keyword 
sonet followed by the slot/port 
information. 
• For a 10-Gigabit Ethernet interface, enter the keyword 
TenGigabitEthernet 
followed by the slot/port information. 
• For a VLAN, enter the keyword 
vlan followed by a number from 1 to 4094.
Version 8.3.19.0 Introduced on S4820T
Version 8.3.12.0 Introduced on S4810
FTOS#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
!
FTOS#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 )
 Adjacency being used for MTs: IPv4 IPv6 
FTOS#
Identified Multi-Topology ISIS enabled
Table 29-2. show isis neighbors Command Example Fields
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 advertised by the neighbor. 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. 










