display bier ipv6 prefix

Function

The display bier ipv6 prefix command displays information about BFR-prefixes configured in a BIERv6 scenario.

Format

display bier ipv6 prefix [ prefix-ipv6 ] [ igp-type isis originate-systemid originate-system-id ] [ sub-domain id [ bsl { 64 | 128 | 256 } ] ]

Parameters

Parameter	Description	Value
prefix-ipv6	Specifies a BFR-prefix.	The value is a 32-digit hexadecimal number in the format of X:X::X:X.
igp-type	Indicates an IGP type.	-
isis	Displays information about BFR-prefixes advertised by IS-IS.	-
originate-systemid originate-system-id	Specifies the system ID of an IS-IS router.	The value is a hexadecimal integer, in the format of XXXX.XXXX.XXXX.
sub-domain id	Specifies the ID of a BIERv6 sub-domain.	The value is an integer ranging from 0 to 255.
bsl	Specifies a BSL in BIERv6 encapsulation.	The value can be 64, 128, or 256.

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
bier	read

Usage Guidelines

Usage Scenario

To view information about BFR-prefixes in multicast over BIERv6 scenarios, run the display bier ipv6 prefix command.

Precautions

This command displays BFR prefix information only in dynamic scenarios. If no protocol is configured in a sub-domain or static BIFT is configured as the protocol, the displayed BFR prefix information is empty.

Example

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

# Display information about all BIERv6 prefixes.

<HUAWEI> display bier ipv6 prefix
 Total number of Local BFR Prefixes: 1
 Total number of Remote BFR Prefixes: 1

 Status Codes: * - valid

 IGP protocol: ISIS (process ID: 1, MT-ID: 2, level: 2)
   Local system:
     BFR prefix: 2001:DB8:1::1/128
       Sub-domain  BFR-ID  BSL   Max-SI  Uptime    Encapsulation|BIFT-id-base|End-bier SID
     * 0           1       256   2       1d:23h    IPV6|BIFT-id-base<196608>|2001:DB8:2::1
   Advertising system ID: 0000.0000.0002
     BFR prefix: 2001:DB8:1::2/128
       Sub-domain  BFR-ID  BSL   Max-SI  Uptime    Encapsulation|BIFT-id-base|End-bier SID
     * 0           2       256   2       1d:23h    IPV6|BIFT-id-base<196608>|2001:DB8:2::20

# Display information about a specified BFR-prefix.

<HUAWEI> display bier ipv6 prefix 2001:DB8:1::2
 BFR prefix : 2001:DB8:1::2/128
   IGP protocol             : ISIS (process ID: 1, MT-ID: 2, level: 2)
     System ID              : 0000.0000.0002
     Flags                  : INTRA | VALID | BEST
       Sub-domain ID        : 0
         Flags              : VALID
         BFR-ID             : 2
         BAR                : 0
         IPA                : 0
         Encapsulation type : IPV6
           BSL              : 256
           Flags            : VALID
           BIFT-id-base     : 196608
           Max-SI           : 2
           End-bier SID     : 2001:DB8:2::20
           Uptime           : 1d:23h

**Table 1** Description of the **display bier ipv6 prefix** command output
Item	Description
Total number of Local BFR Prefixes	Total number of local BFR-prefixes.
Total number of Remote BFR Prefixes	Total number of remote BFR-prefixes.
Local system	Local IS-IS system.
BFR prefix	BFR-prefix.
Status Codes: * - valid	If an asterisk (*) exists before a prefix record, the prefix is valid.
IGP protocol	IGP protocol.
Sub-domain	BIER sub-domain.
BFR-ID	BFR-ID.
BSL	Bitstring length.
Max-SI	Maximum SI value.
Uptime	Time to live.
Advertising system ID	ID of the source IS-IS system.
System ID	Network-entity ID.
Flags	BFR prefix flag: Local: local route. INTRA: intra-domain route. VALID: valid route. BEST: optimal route. INTER: leaked route.
Flags	BIER sub-domain flags: VALID: valid. DUPLICATE_SD: The device repeatedly advertises the same SD. INVALID_IGP_CFG: The SD advertised by an IGP instance is the same as that advertised by another IGP instance. INVALID_BAR: The BIERv6 algorithm advertised by the device is invalid. INVALID_IPA: The IGP algorithm advertised by the device is invalid. DUPLICATE_BFR_ID: The BFR-ID advertised by the device is the same as that advertised by another device. INVALID_MT: The SD or BSL advertised by the device is not configured locally. SUPPRESS_BFRID_ADV: The locally configured BFR-ID is the same as the BFR-ID advertised by another device.
Flags	BIER encapsulation type flags. VALID: valid. UNKNOWN_SD: The SD advertised by the device is not configured locally. INVALID_IGP_CFG: The SD advertised by an IGP instance is the same as that advertised by another IGP instance. DUPLICATE_BSL: The device repeatedly advertises the same BSL. INVALID_BSL: The BSL value advertised by the device is invalid. UNSUPPORT_BSL: The BSL value advertised by the device is not supported. INVALID_LABEL: The BIFT-ID advertised by the device is invalid. INVALID_LABEL_RANGE: The BIFT-ID range advertised by the device is invalid. OVERLAP_LABEL_RANGE: The BIFT-ID range of one BSL advertised by the device overlaps with that of another BSL advertised by the device. SD_UNSUPPORT_BSL: The BSL value advertised by the device is not configured locally. INVALID_BSL_BFRID_MAXSI_ASSO: The BFR-ID advertised by the device exceeds the maximum value that can be expressed by the advertised BSL and Max-SI.
BAR	BIERv6 algorithm.
IPA	IGP algorithm.
Encapsulation	Encapsulation type of BIERv6 packets.
Encapsulation type	Packet encapsulation type.
BIFT-id-base	Start BIFT-ID.
End-bier SID	End.BIER SID.