display isis interface

Function

The display isis interface command displays information on IS-IS interfaces.

Format

display isis interface { interface-name | interface-type interface-number } [ verbose ]

display isis process-id interface [ verbose | te-tunnel ]

display isis interface [ verbose | te-tunnel ] [ vpn-instance vpn-instance-name ]

display isis process-id interface { interface-name | interface-type interface-number } [ verbose ]

display isis [ process-id ] interface srv6-te [ srv6-te-intf-name ] [ verbose | tunnel ]

Parameters

Parameter Description Value
verbose

Displays the details of the interface.

-
process-id

Specifies the ID of an IS-IS process.

The value is an integer ranging from 1 to 4294967295.

If no IS-IS process is specified, information about interfaces in all local IS-IS processes is displayed.
interface interface-type interface-number

Specifies an interface type and number.

-
interface interface-name

Specifies an interface name.

-
te-tunnel

Displays MPLS TE tunnel information.

-
vpn-instance vpn-instance-name

Specifies the VPN instance to which an IS-IS process belongs.

The value is a string of 1 to 31 case-sensitive characters, spaces not supported. In addition, the VPN instance name must not be _public_. When double quotation marks are used around the string, spaces are allowed in the string.
srv6-te srv6-te-intf-name

Specifies the name of an SRv6 TE interface.

-
tunnel

Displays tunnel information about an SRv6 TE interface.

-

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name Operations
isis read

Usage Guidelines

Usage Scenario

To check information on IS-IS interfaces, including the interface name, IP address, link status of each interface, run the display isis interface command. If verbose is specified, the output of this command also covers IS-IS parameter configurations for each interface, such as the CSNP broadcast interval, hello packet broadcast interval, and the number of IS-IS Hello packets sent by the neighbor before IS-IS should declare the neighbor Down.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display information on IS-IS interfaces.
<HUAWEI> display isis interface verbose

                       Interface information for ISIS(1)
                       ---------------------------------

 Interface         Id      IPV4.State          IPV6.State      MTU  Type  DIS
 Eth0/1/17          001         Up          Mtu:Up/Lnk:Up/IP:Up 1497 L1/L2 No/No
  Circuit MT State            : Standard  
  Description                 : 
  SNPA Address                : 00e0-fc12-3456
  Adjacency Up                : L1 false  L2  true
  IP Address                  : 192.168.1.1
  Maximum SID Depth           : 10
  IPv6 Maximum SID Depth      :   Max-SL: 10   Max-End-Pop: 11   Max-H-Ins: 10   Max-H-Encap: 10   Max-End-D: 11
  IPV6 Link Local Address     : 
  IPV6 Global Address(es)     : 
  Csnp Timer Value            :  L1    10  L2    10
  Hello Timer Value           :  L1    10  L2    10
  DIS Hello Timer Value       :  L1     3  L2     3
  Hello Multiplier Value      :  L1     3  L2     3
  LSP-Throttle Timer          :  L12    50 <ms>
  Cost                        :  L1    10  L2    10
  Ipv6 Cost                   :  L1     0  L2     0
  Priority                    :  L1    64  L2    64
  Retransmit Timer Value      :  L1     5  L2     5
  Bandwidth-Value             :  Low  100000000  High          0
  Static Bfd                  :  NO
  Dynamic Bfd                 :  YES
  Static IPv6 Bfd             :  NO
  Dynamic IPv6 Bfd            :  NO
  BFD Bit Error               :  YES
  Suppress Base               :  NO
  IPv6 Suppress Base          :  NO
  Virtual Cluster ACCESS      :  NO
  Extended-Circuit-Id Value   :  0000000000
  Circuit State               :  OSI:UP   / IP:UP   / MTU:UP   / SNPA:UP   /
                                 BandWidth:UP   / IsEnable:UP   / Interface:UP  
  Circuit Ipv6 State          :  OSI:UP   / IP:UP   / MTU:UP   / SNPA:UP   /
                                 BandWidth:UP   / IsEnable:DOWN / Interface:UP  
  BFD Incr-Cost State         :  MT0 L1 : NO / MT0 L2 : NO / MT2 L1 : NO / MT2 L2 : NO
  Link quality adjust cost    :  NO
  IPv6 Link quality cost      :  NO
  Link quality                :  0x4(LOW)
  CRC-ERR State               :  0x0(DOWN)
  Effective Link Quality      :  0x4(LOW)
  Suppress flapping peer      :  YES(flapping-count: 0, threshold: 10)
# Displays information about the srv6-te shortcut interface enabled with IS-IS.
<HUAWEI> display isis interface srv6-te SRv6TE-Policy-4 tunnel

                       Interface information for ISIS(1)
                       ---------------------------------

 Interface         Id      IPV4.State          IPV6.State      MTU  Type  DIS
 SRv6TE-Policy-4   041 Mtu:Dn/Lnk:Dn/IP:Dn         Up          9600 L1/L2 --
  Tunnel L1 State              : ON
  Tunnel L2 State              : ON
  Tunnel Type                  : SRv6TE-AA
  MetricType                   : Relative
  Metric                       : 0
  Destination IPv6 Router ID   : 20:100::1
  Circuit Ipv6 State           : OSI:UP   / IP:UP   / MTU:UP   / SNPA:UP   /
                                 BandWidth:UP   / IsEnable:UP   / Interface:UP
Table 1 Description of the display isis interface command output
Item Description
Interface

Type and number of an IS-IS interface.
IPV6 Link Local Address

IPV6 Link-local address.
IPV6 Global Address(es)

Circuit IPv6 address.
MTU

MTU of the interface.
Type

Type of interface:

  • L1: Level-1 interface.
  • L2: Level-2 interface.
  • L1/L2: Level-1-2 interface.
DIS

Whether the interface is a Designated Intermediate System (DIS):

  • No/No: The interface is not a DIS either in the Level-1 or Level-2 area.
  • Yes/Yes: The interface is a DIS in both Level-1 and Level-2 areas.
  • Yes/No: The interface is a DIS in the Level-1 area.
  • No/Yes: The interface is a DIS in the Level-2 area.
  • --: The interface is P2P, and it cannot be a DIS.
DIS Hello Timer Value

Interval at which the DIS sends Hello packets, which is one third of Hello Timer Value. The field takes effect only when the interface functions as the DIS.
Description

Description of the interface.
SNPA Address

MAC address of the interface.
SNPA

SNPA status.
IP Address

Primary IPv4 address of the interface.
Link quality adjust cost

Whether bit-error-triggered interface cost adjustment is effective:

  • NO.
  • YES.

The prerequisites for the function to take effect are as follows:

  • The cost specified in the isis link-quality low incr-cost cost command is not 0.
  • The link quality is 0x4 (Low). For details, see the description of the Link quality field.
  • IDP-OSPF synchronization is not in HoldMaxCost state. To check the state, run the display isis ldp-sync interface command.
  • OSPF neighbor relationship flapping suppression is not in hold-max-cost state. For details, see the description of the Suppress flapping peer field.
Link quality

Link quality. The bit error rate is: LOW > MEDIUM > HIGH > GOOD.

  • 0x0(GOOD).
  • 0x1(HIGH).
  • 0x2(MEDIUM).
  • 0x4(LOW).
Csnp Timer Value

Interval at which the IS sends CSNPs, which can be set using the isis timer csnp command. Modifying the interval affects IS-IS route convergence.
Hello Timer Value

Interval at which the IS sends Hello packets, which can be set using the isis timer hello command.
Hello Multiplier Value

Number of sent IS-IS Hello packets that are not replied by a neighbor before the local device declares the neighbor Down. The value can be set using the isis timer holding-multiplier command. Because the value determines the hold time of IS-IS neighbor relationships, referring the usage guideline of the command before configuring the value is recommended.
LSP-Throttle Timer

Minimum interval at which LSPs are sent, which can be set using the isis timer lsp-throttle command.
Cost

IPv4 cost on an interface. The value is decisive in route selection.
Ipv6 Cost

IPv6 cost on an interface. The value is decisive in route selection.
Priority

DIS priority on an interface, which can be set using the isis dis-priority command. The device with the highest DIS priority is selected as the DIS.
Retransmit Timer Value

Interval at which LSPs are resent, which can be set using the isis timer lsp-retransmit command.
Bandwidth-Value

Bandwidth of an interface. The value can be calculated using the following formula:

Bandwidth-Value = 4294967296 x high + low. For example, if the value of high is 1 and the value of low is 705032704, Bandwidth-Value = 1 x 4294967296 + 705032704 = 5000000000.

  • low: The maximum value is 4294967295.
  • high: The maximum value is 4294967295.
Static Bfd

Whether static BFD is enabled:

  • NO.
  • YES.
Static IPv6 Bfd

Whether static BFD for IPv6 is enabled.

  • NO.
  • YES.
Dynamic Bfd

Whether dynamic BFD is enabled:

  • NO.
  • YES.
Dynamic IPv6 Bfd

Whether dynamic IPv6 BFD is enabled.

  • NO.
  • YES.
IPv6 Maximum SID Depth

Maximum SRv6 SID depth supported by an interface. This field is not displayed for a loopback interface or an SRv6-incapable interface.
IPv6 Link quality cost

Whether bit-error-triggered interface cost adjustment is effective:

  • NO.
  • YES.

The prerequisites for the function to take effect are as follows:

  • The cost specified in the isis ipv6 link-quality low incr-cost cost command is not 0.
  • The link quality is 0x4 (Low). For details, see the description of the Link quality field.
  • OSPF neighbor relationship flapping suppression is not in hold-max-cost state. For details, see the description of the Suppress flapping peer field.
IPv6 Suppress Base

Whether an interface belongs to an IPv6 base topology: - NO - YES.
Suppress flapping peer

Status of IS-IS neighbor relationship flapping suppression:

  • NO: IS-IS neighbor relationship flapping suppression is disabled.
  • YES (flapping-count: 3, threshold: 10): IS-IS neighbor relationship flapping suppression is enabled and IS-IS neighbor relationship is not suppressed. The flapping-count and threshold value.
  • Hold-down(start: UTC 10:20:30, remain-interval: 7): IS-IS neighbor relationship flapping suppression works in Hold-down mode. The starting and remaining time of the flapping suppression.
  • Hold-max-cost(start: UTC 10:20:30, remain-interval: 7): IS-IS neighbor relationship flapping suppression works in Hold-max-cost mode. The starting and remaining time of the flapping suppression.

In the flapping suppression state, remain-interval is reset each time when the device detects a valid neighbor flapping event.
Suppress Base

Whether an interface belongs to an IPv4 base topology:

  • NO.
  • YES.
Virtual Cluster ACCESS

Virtual cluster access state.
Virtual Cluster

Virtual cluster.
Extended-Circuit-Id Value

Link ID of an interface.
Circuit MT State

Topology on the interface:

  • Standard.
  • IPv6.
Circuit State

Circuit state.
Circuit Ipv6 State

Circuit IPv6 state.
CRC-ERR State

CRC-error state of an interface.

  • 0x0(DOWN).
  • 0x1(UP).
Effective Link Quality

Link quality that takes effect. The value is obtained based on the Link quality and CRC-ERR state fields. If Link quality is LOW or CRC-ERR state is DOWN, the value of this field is LOW.

  • 0x0(GOOD).
  • 0x1(HIGH).
  • 0x2(MEDIUM).
  • 0x4(LOW).
Id

Circuit ID.
IPV4.State

IPv4 link status.
IPV6.State

IPv6 link status.
Adjacency Up

Adjacency up state.
Maximum SID Depth

Maximum SID depth supported by an interface. This field is not displayed for a loopback interface or an SR-incapable interface.
BFD Bit Error

Whether BFD bit errors are enabled:

  • NO.
  • YES.
BFD Incr-Cost State

Adjust the interface cost based on the status of an associated BFD session.
Tunnel L1 State

IS-IS level-1 srv6-te shortcut status of the interface.

  • OFF.
  • ON.
Tunnel L2 State

IS-IS level-2 srv6-te shortcut status of the interface.

  • OFF.
  • ON.
Tunnel Type

srv6-te shortcut type.

  • SRv6TE-AA:Shortcut links do not change the original SPF tree, and the local device does not advertise information about the links destined for the destination node.
MetricType

MetricType:

  • Relative.
  • Absolute.
Metric

IS-IS metric.
Destination IPv6 Router ID

IPv6 router ID of the destination device.
BandWidth

BandWidth status.
IsEnable

ISIS circuit status.
OSI

OSI status.
Max-End-D

Maximum number of SIDs contained in a segment list when the End.DX6 and End.DT6 functions are used.
Max-End-Pop

Maximum number of SIDs in a segment list.
Max-H-Ins

Maximum number of SIDs that can be added to segment list information when a node performs a H.insert operation.
Max-H-Encap

Maximum number of SIDs that can be contained in a segment list when a node performs a H.Encap operation.
Max-SL

Maximum value of the SL field carried in the segment list of a packet that a local node can receive.
Parent Topic: IS-IS Configuration Commands
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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