display isis peer

Function

The display isis peer command displays IS-IS neighbor information.

Format

display isis process-id peer [ verbose ]

display isis peer [ verbose ] [ process-id | vpn-instance vpn-instance-name ]

display isis peer interface interface-type interface-number [ verbose ]

Parameters

Parameter	Description	Value
verbose	Displays detailed IS-IS neighbor information, including the area address, period during which the neighbor remains Up, and IP address of its directly connected interface.	-
process-id	Specifies an IS-IS process ID.	The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name	Specifies the IS-IS multi-instance process in a specified VPN instance.	The value must be an existing VPN instance name.
interface interface-type interface-number	Specifies the type and number of an interface.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

In an IS-IS area, if you need to check whether two devices can communicate properly, run the display isis peer command to view information about the neighbor, including the neighbor status, period during which the neighbor remains Up, and neighbor type.

Example

# Display information about IS-IS neighbors.

<HUAWEI> display isis peer

                          Peer information for ISIS(1)

  System Id     Interface          Circuit Id       State HoldTime Type     PRI
-------------------------------------------------------------------------------
0000.0000.0001   Vlanif10          0000.0000.0001.01   Up    24s   L1(L1L2)  64
0000.0000.0001   Vlanif10          0000.0000.0001.01   Up    24s   L2(L1L2)  64

Total Peer(s): 2

**Table 1** Description of the display isis peer command output
Item	Description
System Id	System ID of the neighbor.
Interface	Type and number of the interface.
Circuit Id	Circuit ID.
State	Neighbor status: Up: indicates that the neighbor is Up and the two ends can communicate. Init: indicates that the local end can receive packets from the remote end but the remote end cannot receive packets from the local end. This status is displayed when authentication is configured on the remote end. Down: indicates that the neighbor is Down. This is the initial status, indicating that no message is received from the neighbor. In most cases, this status is not displayed.
HoldTime	Neighbor holdtime.
Type	Neighbor type: L1: indicates that the neighbor type is Level-1 and interfaces on both ends are Level-1 interfaces. L2: indicates that the neighbor type is Level-2 and interfaces on both ends are Level-2 interfaces. L1(L1L2): indicates that the neighbor type is Level-1 and interfaces on both ends are Level-1-2 interfaces. L2(L1L2): indicates that the neighbor type is Level-2 and interfaces on both ends are Level-1-2 interfaces.
PRI	Priority of the neighbor in DIS election.

# Display detailed information about IS-IS neighbor.

<HUAWEI> display isis peer verbose

                          Peer information for ISIS(1)

  System Id     Interface          Circuit Id          State  HoldTime   Type     PRI
-------------------------------------------------------------------------------
0000.0000.0001  Vlanif10           0000.0000.0001.01      Up     26s     L1(L1L2)   64
  MT IDs supported     : 0(UP)    Local MT IDs         : 0
  Area Address(es)     : 10
  Peer IP Address(es)  : 10.10.10.1
  Peer IPv6 Address(es): FE80:2000:57::7
  Uptime               : 00:00:19
  Adj Protocol         : IPV4
  Restart Capable      : YES
  Suppressed Adj       : NO
  Peer System Id     : 0000.0000.0001

0000.0000.0001  Vlanif10           0000.0000.0001.01      Up     27s     L2(L1L2)   64
  MT IDs supported     : 0(UP)    Local MT IDs         : 0
  Area Address(es)     : 10
  Peer IP Address(es)  : 10.10.10.1
  Peer IPv6 Address(es): FE80:2000:56::6
  Uptime               : 00:00:19
  Adj Protocol         : IPV4
  Restart Capable      : YES
  Suppressed Adj       : NO
  Peer System Id     : 0000.0000.0001

Total Peer(s): 2

**Table 2** Description of the **display isis peer verbose** command output
Item	Description
MT IDs supported	IDs of topology instances supported by the remote interface.
Local MT IDs	IDs of topology instances supported by the local interface.
Area Address(es)	Area addresses of the neighbor.
Peer IP Address(es)	IP address of the remote interface.
Peer IPv6 Address(es)	IPv6 address of the remote interface.
Uptime	Period during which the neighbor remains Up.
Adj Protocol	Protocol used for establishing the adjacency.
Restart Capable	Whether GR is supported: YES: indicates that GR is supported. NO: indicates that GR is not supported.
Suppressed Adj	Whether neighbor suppression is supported: YES: indicates that neighbor suppression is supported. NO: indicates that neighbor suppression is not supported.
Peer System Id	The System ID of the IS-IS peer.
Total Peer(s)	Number of neighbors.