display bier prefix

Function

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

Format

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

Parameters

Parameter	Description	Value
prefix-ip	Specifies a BFR-prefix.	The value is in dotted decimal notation.
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 subdomain.	The value is in dotted decimal notation.
bsl	Specifies a BSL in BIER 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 BIER scenarios, run the display bier prefix command.

Example

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

# Display information about a specified BFR-prefix.

<HUAWEI> display bier prefix 1.1.1.1
BFR prefix: 1.1.1.1/32
   IGP protocol             : ISIS (process ID: 1, MT-ID: 0, level: 1)
     System ID              : 0000.0000.0002
     Flags                  : LOCAL | INTRA | VALID | BEST
       Sub-domain ID        : 0
         Flags              : VALID
         BFR-ID             : 1
         BAR                : 0
         IPA                : 0
         Encapsulation type : MPLS
           BSL              : 256
           Flags            : VALID
           MPLS label       : 32905
           Max-SI           : 0
           Uptime           : 10:20:30
         Encapsulation type : MPLS
           BSL              : 128
           Flags            : VALID
           MPLS label       : 32916
           Max-SI           : 0
           Uptime           : 10:20:30

# Display information about all BIER-prefixes.

<HUAWEI> display bier prefix
 Total number of Local BFR Prefixes: 1
 Total number of Remote BFR Prefixes: 2
 Status codes: * - valid
    IGP protocol: ISIS (process ID: 1, MT-ID: 0, level: 1)
   Local system:
     BFR prefix: 4.4.4.4/32
       Sub-domain  BFR-ID  BSL   Max-SI  Uptime    Encapsulation
     * 3           4       256   1       100d20h   MPLS|label-base<35879>
     * 3           4       64    1       10:20:30  MPLS|label-base<36874>
   Advertising system ID: 0000.0000.0005
     BFR prefix: 5.5.5.5/32
       Sub-domain  BFR-ID  BSL   Max-SI  Uptime    Encapsulation
     * 3           5       256   1       10:20:30  MPLS|label-base<31789>
   Advertising system ID: 0000.0000.0006
     BFR prefix: 6.6.6.6/32
       Sub-domain  BFR-ID  BSL   Max-SI  Uptime    Encapsulation
     * 3           6       256   1       10:20:30  MPLS|label-base<32471>

**Table 1** Description of the **display bier prefix** command output
Item	Description
BFR prefix	BFR prefix.
IGP protocol	IGP information.
System ID	System ID.
Flags	BFR prefix flag: Local: local route. INTRA: intra-area route. VALID: valid route. BEST: optimal route.
Flags	BIER sub-domain flag: VALID: valid. DUPLICATE_SD: The device repeatedly advertises the same SD. INVALID_IGP_CFG: The SD advertised by the IGP instance is the same as that of 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 of 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 flag: VALID: valid. UNKNOWN_SD: The SD advertised by the device is not configured locally. INVALID_IGP_CFG: The SD advertised by the IGP instance is the same as that of another IGP instance. DUPLICATE_BSL: The device repeatedly notified 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 label advertised by the device is invalid. INVALID_LABEL_RANGE: The label range advertised by the device is invalid. OVERLAP_LABEL_RANGE: The label range corresponding to the BSL advertised by the device overlaps with the label range corresponding to another BSL advertised by the device. SD_UNSUPPORT_BSL: The BSL 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 represented by the advertised BSL and Max-SI.
Sub-domain	BIER sub-domain.
BFR-ID	BFR-ID.
BAR	BIER algorithm.
IPA	IGP algorithm.
Encapsulation	Encapsulation type of BIER packets.
Encapsulation type	Packet encapsulation type.
MPLS label	MPLS label.
BSL	Length of the BitString.
Max-SI	Maximum SI value.
Uptime	Keepalive time.
Total number of Local BFR Prefixes	Total number of local BIER prefixes.
Total number of Remote BFR Prefix	Number of remote BFR prefixes.
Total number of Remote BFR Prefixes	Number of remote BFR prefixes.
Local system	Local IS-IS system.
Status codes: * - valid	If a prefix is marked with an asterisk (*), the prefix is valid.
Advertising system ID	Source IS-IS System ID.