display bgp link-state unicast routing-table (All views)

Function

The display bgp link-state unicast routing-table command displays BGP-LS route information.

Format

display bgp link-state unicast routing-table [ peer { ipv4-address | ipv6-address } { received-routes | advertised-routes } ] bgp-ls-prefix

Parameters

Parameter Description Value
peer ipv4-address

Specifies the address of the IPv4 peer to be displayed.

The value is in dotted decimal notation.
ipv6-address

Specifies the address of the IPv6 peer to be displayed.

The value is a 32-digit hexadecimal number, in the format of X:X:X:X:X:X:X:X.
received-routes

Displays BGP-LS routes received from the specified peer.

-
advertised-routes

Displays BGP-LS routes advertised to the specified peer.

-
bgp-ls-prefix

Specifies a BGP-LS route prefix.

The BGP-LS route prefix format is complex. To facilitate your query, run the display bgp link-state unicast routing-table command to check all BGP-LS routes, and copy the prefix of the route whose information is to be queried when specifying prefix.

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name Operations
bgp read

Usage Guidelines

Usage Scenario

To check BGP-LS route information, run the display bgp link-state unicast routing-table command. BGP-LS routes carry topology information and are classified into five types of routes that carry node, link, route prefix, TE Policy and SRv6-sid information, respectively. Theses routes collaborate in carrying topology information.

Example

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

# Display information about BGP-LS node routes with a specified prefix.
<HUAWEI> display bgp link-state unicast routing-table [NODE][ISIS-LEVEL-1][IDENTIFIER0][LOCAL[as100][bgp-ls-identifier3.3.3.3][ospf-area-id0.0.0.0][igp-router-id0000.0000.0002.00]]


 BGP local router ID : 1.1.1.1
 Local AS number : 200
 Paths:   1 available, 1 best, 1 select
 BGP routing table entry information of [NODE][ISIS-LEVEL-1][IDENTIFIER0][LOCAL[as100][bgp-ls-identifier3.3.3.3][ospf-area-id0.0.0.0][igp-router-id0000.0000.0002.00]]:
 From: 100.0.0.2 (189.118.23.24) 
 Route Duration: 0d00h00m03s
 Direct Out-interface: Ethernet0/1/19 
 Original nexthop: 12.1.1.2
 AS-path 100, origin incomplete, MED 0, pref-val 0, valid, external, best, select, pre 255
 Link-state Route Type: NODE
 Protocol: ISIS-LEVEL-1
 Identifier: 0
 Local Node Descriptor:
  AS Number: 100
  BGP Identifier: 3.3.3.3
  OSPF Area ID: 0.0.0.0
  IGP Router ID: 0000.0000.0002.00
 Link-state attribute:
  MT ID: 0 
  Node Flag Bits: 0x0
  Opaque Node Properties: 
  Node name: 
  IS-IS Area Identifier: 0x00 
  IPv4 Router ID of Local Node: 
  IPv6 Router ID of Local Node: 2::2 
  SID/Label Binding: 
  SR Capabilities(Flags/[Range Size, Sid Value]): <0xc0/[16001,16000]>
  SR Local Block(Flags/[Range Size, Sid Value]): 
  SR Algorithm: 
  SRv6 Capabilities(Flags): 
  MSD([MSD Type, MSD Value]): [1,10]
  Flexible Algorithm Definition Count: 1
 Advertised to such 1 peers:
    10.1.1.2
# Display information about BGP-LS link routes with a specified prefix.
<HUAWEI> display bgp link-state unicast routing-table [LINK][ISIS-LEVEL-2][IDENTIFIER0][LOCAL[as100][bgp-ls-identifier3.3.3.3][ospf-area-id0.0.0.0][igp-router-id0000.0000.0002.00]][REMOTE[as100][bgp-ls-identifier3.3.3.3][ospf-area-id0.0.0.0][igp-router-id0000.0000.0003.01]][LINK[if-address100.0.0.2][peer-address0.0.0.0][if-address::][peer-address::]][index1]


 BGP local router ID : 1.1.1.1
 Local AS number : 200
 Paths:   1 available, 1 best, 1 select
 BGP routing table entry information of [LINK][ISIS-LEVEL-2][IDENTIFIER0][LOCAL[as100][bgp-ls-identifier3.3.3.3][ospf-area-id0.0.0.0][igp-router-id0000.0000.0002.00]][REMOTE[as100][bgp-ls-identifier3.3.3.3][ospf-area-id0.0.0.0][igp-router-id0000.0000.0003.01]][LINK[if-address100.0.0.2][peer-address0.0.0.0][if-address::][peer-address::]]:
 From: 100.0.0.2 (189.118.23.24) 
 Route Duration: 0d00h00m05s
 Direct Out-interface: Ethernet0/1/19 
 Original nexthop: 12.1.1.2
 AS-path 100, origin incomplete, MED 0, pref-val 0, valid, external, best, select, pre 255
 Link-state Route Type: LINK
 Protocol: ISIS-LEVEL-2
 Identifier: 0
 Local Node Descriptor:
  AS Number: 100
  BGP Identifier: 3.3.3.3
  OSPF Area ID: 0.0.0.0
  IGP Router ID: 0000.0000.0002.00
 Remote Node Descriptor:
  AS Number: 100
  BGP Identifier: 3.3.3.3
  OSPF Area ID: 0.0.0.0
  IGP Router ID: 0000.0000.0003.01
 Link Descriptor:
  IPv4 interface address: 100.0.0.2
  IPv4 neighbor address: 0.0.0.0
  IPv6 interface address: ::
  IPv6 neighbor address: ::
 Link-state attribute:
  Link Local Identifier: 47
  IPv4 Router ID of Local Node: 
  IPv6 Router ID of Local Node: 2::2 
  IPv4 Router ID of Remote Node: 
  IPv6 Router ID of Remote Node: 
  Administrative group: 0x0
  Maximum link bandwidth(kbits/sec): 0
  Maximum reservable link bandwidth(kbits/sec): 0
  Maximum Unreserved bandwidth(kbits/sec): 0 0 0 0 0 0 0 0 
  TE Default Metric: 0
  Link Protection Type: Null
  MPLS Protocol Mask: 0x0
  IGP Metric: 10
  Shared Risk Link Group: 
  Min/Max Unidirectional Link Delay(microseconds): 0/0
  Opaque link Properties: 
  Link Name: 
  Adjacency Segment Identifier(Flags/Weight/SID): 
  LAN Adjacency Segment Identifier(Flags/Weight/System-ID/SID): 
  SRv6 End.X SID(EndPoint Function/Flags/Algorithm/Weight/SID): 
  SRv6 LAN End.X SID(EndPoint Function/Flags/Algorithm/Weight/Neighbor ID/SID): 
  Application Specific Link Attributes:
   SABML/UDABML/SABM/UDABM: <4/0/0x00000010></4>
   TE Default Metric: 200
   Min/Max Unidirectional Link Delay(Flags/Min Delay(us)/Max Delay(us)): <0/300/300>
   Advertising Extended Administrative Groups: 0x00000002
 Advertised to such 1 peers:
    10.1.1.2
# Display information about BGP-LS IPv4 prefix routes with a specified prefix.
<HUAWEI> display bgp link-state unicast routing-table  [IPV4-PREFIX][ISIS-LEVEL-2][IDENTIFIER0][LOCAL[as100][bgp-ls-identifier3.3.3.3][ospf-area-id0.0.0.0][igp-router-id0000.0000.0003.00]][PREFIX[ospf-route-type0][prefix3.3.3.3/32]][index1]


 BGP local router ID : 1.1.1.1
 Local AS number : 200
 Paths:   1 available, 1 best, 1 select
 BGP routing table entry information of [IPV4-PREFIX][ISIS-LEVEL-2][IDENTIFIER0][LOCAL[as100][bgp-ls-identifier3.3.3.3][ospf-area-id0.0.0.0][igp-router-id0000.0000.0003.00]][PREFIX[ospf-route-type0][prefix3.3.3.3/32]]:
 From: 100.0.0.2 (189.118.23.24) 
 Route Duration: 0d00h00m01s
 Direct Out-interface: Ethernet0/1/19 
 Original nexthop: 12.1.1.2
 AS-path 100, origin incomplete, MED 0, pref-val 0, valid, external, best, select, pre 255
 Link-state Route Type: IPV4-PREFIX
 Protocol: ISIS-LEVEL-2
 Identifier: 0
 Local Node Descriptor:
  AS Number: 100
  BGP Identifier: 3.3.3.3
  OSPF Area ID: 0.0.0.0
  IGP Router ID: 0000.0000.0003.00
 Prefix Descriptor:
  OSPF Route Type: Null
  IP Prefix: 3.3.3.3/32
 Link-state attribute:
  IGP Flags: 0x0
  Route Tag: 
  Extended Tag: 
  Prefix Metric: 10
  OSPF Forwarding Address: 0.0.0.0
  Opaque Prefix Attribute: 0.0.0.0
  Prefix SID(Flags/Algorithm/SID): <0xa0/128/1002>
  Flex Algorithm Prefix Metric Count: 2
 Advertised to such 1 peers:
    10.1.1.2
Table 1 Description of the display bgp link-state unicast routing-table (All views) command output
Item Description
BGP local router ID

Local router ID of BGP.
BGP routing table entry information of

Routing entry information.
BGP Identifier

BGP identifier.
Local AS number

Local AS number.
Local Node Descriptor

Description of the local node:

  • AS Number: indicates the AS number of BGP-LS.
  • BGP Identifier: BGP-LS domain ID;
  • OSPF Area ID: indicates the ID of an OSPF area.
  • IGP Router ID: indicates the router ID of an IGP, which is generated by the IGP that collects topology information.
AS Number

AS number.
select

Preferred route.
Route Duration

Duration of the route.
Route Tag

Route label.
Direct Out-interface

Directly connected outbound interface.
Original nexthop

Original next hop.
AS-path

AS_Path attribute. Nil indicates that the attribute value is null.
origin

Origin attribute of a BGP route It is classified into the following types:

  • IGP: If a route is added to the BGP routing table using the network command, its origin is IGP.
  • EGP: indicates the route information obtained through the EGP. The Origin attribute of the route information is EGP.
  • Incomplete: The origin of the route cannot be identified. For example, the Origin attribute of the routes imported by BGP through the import-route command is Incomplete.
MED

Multi-Exit-Discriminator (MED): determines the optimal route for traffic entering an AS. If the other attributes of routes are the same, the route with the smallest MED value is selected as the optimal route.
pref-val

Local preference of a BGP route.
pre

BGP route preference.
Link-state Route Type

BGP-LS route type, which can be node, link, or route prefix.
Link-state attribute

Link status attribute:

  • MT ID: identifies the topology to which an interface is bound in an IGP.
  • Node Flag Bits: a node flag bit;
  • Opaque Node Properties: indicates the node that cannot be identified.
  • Node name: indicates the name of an IGP topology node.
  • IS-IS Area Identifier: BGP-LS identifier of IS-IS;
  • IPv4 Router ID of Local Node: indicates the IPv4 router ID of the local node.
  • IPv6 Router ID of Local Node: indicates the IPv6 router ID of the local node.
  • SR Capabilities(Flags/[Range Size, Sid Value]): segment routing capabilities;
  • Local SR Local Block(Flags/[Range Size, Sid Value]):SR label stack information;
  • SR Algorithm: segment routing algorithm.
OSPF Area ID

OSPF area ID.
OSPF Route Type

OSPF route type.
OSPF Forwarding Address

OSPF forwarding address.
IGP Router ID

IGP route ID.
IGP Metric

IGP metric.
IGP Flags

IGP flag.
Opaque link Properties

Opaque link attribute.
Opaque Prefix Attribute

Opaque prefix attribute.
IPv4 interface address

IPv4 address of the interface.
IPv4 neighbor address

IPv4 peer address.
IPv4 Router ID of Remote Node

IPv4 router ID of the remote node.
IPv6 interface address

IPv6 address of an interface.
IPv6 neighbor address

IPv6 peer address.
IPv6 Router ID of Remote Node

IPv6 router ID of the remote node.
SRv6 Capabilities(Flags)

SRv6 function (function flag).
SRv6 End.X SID(EndPoint Function/Flags/Algorithm/Weight/SID)

SRv6 End.X SID (endpoint function/flag/algorithm/weight/SID).
SRv6 LAN End.X SID(EndPoint Function/Flags/Algorithm/Weight/Neighbor ID/SID)

SRv6 LAN End.X SID (endpoint function/flag/algorithm/weight/neighbor ID/SID).
Flexible Algorithm Definition Count

Number of attributes defined by the flexible algorithm.
Remote Node Descriptor

Remote node route descriptor.
Link Descriptor

Link route descriptor.
Link Local Identifier

Local identifier of a link route.
Link Protection Type

Link protection type.
Link Name

Link name.
Administrative group

Management group.
Maximum link bandwidth(kbits/sec)

Maximum link bandwidth, in kbit/s.
Maximum reservable link bandwidth(kbits/sec)

Maximum reservable link bandwidth (kbit/s/sec).
Maximum Unreserved bandwidth(kbits/sec)

Maximum unreserved bandwidth (kbit/s/sec).
TE Default Metric

Default TE metric value.
MPLS Protocol Mask

Mask of the MPLS protocol.
Protocol

IGP that collects topology information.
Shared Risk Link Group

Shared risk link group (SRLG).
Min/Max Unidirectional Link Delay(microseconds)

Minimum/Maximum unidirectional link delay, in microseconds.
Min/Max Unidirectional Link Delay(Flags/Min Delay(us)/Max Delay(us))

Minimum/Maximum unidirectional link delay (link delay flag/minimum delay (microsecond)/maximum delay (microsecond)).
Adjacency Segment Identifier(Flags/Weight/SID)

Adjacency segment identifier (critical segment identifier/weight/SID).
LAN Adjacency Segment Identifier(Flags/Weight/System-ID/SID)

LAN adjacency identifier (LAN adjacency identifier/weight/system ID/SID).
Application Specific Link Attributes

Semantic attribute of a specific application link.
Advertising Extended Administrative Groups

Broadcast extended management group.
Extended Tag

Extended label.
Prefix Descriptor

Prefix descriptor.
Prefix Metric

Prefix metric.
Prefix SID(Flags/Algorithm/SID)

Prefix SID (flag/algorithm/SID).
IP Prefix

IP address prefix.
Flex Algorithm Prefix Metric Count

Number of flexible algorithm prefix metrics.
Paths

Route selection result.
From

IP address of the device that sends the route.
valid

Valid route.
external

External route.
best

Optimal route.
Identifier

BGP-LS identifier of the protocol that collects topology information.
MSD([MSD Type, MSD Value])

MSD ([MSD type, MSD value]).
SABML/UDABML/SABM/UDABM

SABML/UDABML/SABM/UDABM.
Parent Topic: BGP-LS Configuration Commands
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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