tracert bier ipv6

Function

The tracert bier ipv6 command discovers the gateways that packets pass through to the destination BIERv6 device.

Format

tracert bier ipv6 sub-domain subDomainId bsl { 64 | 128 | 256 } { bfr-id bfrID | bfr-id-start bfrIdStartVal bfr-id-end bfrIdEndVal } [ -a source-ip-address | -f first-ttl-val | -m max-ttl-val | -w timeout | udp-port dstPort6 | entropy entropy-val ] ^*

Parameters

Parameter	Description	Value
bsl	Specifies the length of a BFR bit string.	The value can be 64, 128, or 256.
bfr-id bfrID	Specifies a BFR-ID.	The value is an integer that ranges from 1 to 65535.
bfr-id-start bfrIdStartVal	Specifies the minimum value of the target BFR-ID.	The value is an integer that ranges from 1 to 65535.
bfr-id-end bfrIdEndVal	Specifies the maximum value of the target BFR-ID.	The value is an integer that ranges from 1 to 65535. The maximum value cannot be smaller than the minimum value, and all target BFR-IDs must be in the same set.
-a source-ip-address	Source address in the IPv6 header of a Query message. Only the local address can be specified. If no source IPv6 address is specified, the IPv6 address of the BIERv6 loopback interface is used as the source address.	The value is a 32-digit hexadecimal number, in the format X:X:X:X:X:X:X:X.
-f first-ttl-val	Specifies the initial TTL value.	The value is an integer ranging from 1 to 255. The default value is 1.
-m max-ttl-val	Specifies the maximum TTL value.	The value is an integer ranging from 1 to 255. The default value is 30.
-w timeout	Sets the timeout time for waiting for the response to the Echo Request packet.	The value is an integer that ranges from 100 to 65535. The default value is 2000.
udp-port dstPort6	Specifies the UDP destination port number of request packets to be sent. The default value is 49100.	The value is an integer that ranges from 1 to 65535. The default value is 49100.
entropy entropy-val	Specifies the entropy of Echo Request packets.	The value is an integer that ranges from 0 to 1048575. The default value is 0.
sub-domain subDomainId	Specifies the ID of a BIERv6 sub-domain.	The value is an integer that ranges from 0 to 255.

Views

All views

Default Level

0: Visit level

Task Name and Operations

Task Name	Operations
sla	execute

Usage Guidelines

Usage Scenario

If a fault occurs on the network and the peer device is a BIERv6 device, run the ping bier ipv6 command to check the network connectivity and then run the tracert bier ipv6 command to locate the fault.

Prerequisites

This feature depends on the BIERv6 tunnel configuration.

Precautions

During a BIERv6 tracert test, if the link changes, the tracert result may be inaccurate. You are advised to stop the test by pressing Ctrl+C and then start the test again.

Example

# Check whether BFR-ID 152 is reachable. The result shows that BFR-ID 152 is reachable.

<HUAWEI> tracert bier ipv6 sub-domain 1 bsl 64 bfr-id 152
  Tracert BIER IPv6: Subdomain ID: 1, BSL: 64, BFRID: 152, press CTRL_C to break
  TTL     Replier(BFR-ID)                                   Time      Type
  0                                                                   Ingress
  1       2001:DB8:1::1(152)                                516 ms    Egress

# Check whether BFR-ID 153 is reachable. The check times out.

<HUAWEI> tracert bier ipv6 sub-domain 1 bsl 64 bfr-id 153
  Tracert BIER IPv6: Subdomain ID: 1, BSL: 64, BFRID: 153, press CTRL_C to break
  TTL     Replier(BFR-ID)                                   Time      Type
  0                                                                   Ingress
  1       Request time out
  2       Request time out
  3       Request time out
  4       Request time out
  5       Request time out
  6       Request time out
  7       Request time out
  8       Request time out
  9       Request time out
  10      Request time out
  11      Request time out
  12      Request time out
  13      Request time out
  14      Request time out
  15      Request time out
  16      Request time out
  17      Request time out
  18      Request time out
  19      Request time out
  20      Request time out
  21      Request time out
  22      Request time out
  23      Request time out
  24      Request time out
  25      Request time out
  26      Request time out
  27      Request time out
  28      Request time out
  29      Request time out
  30      Request time out

**Table 1** Description of the **tracert bier ipv6** command output
Item	Description
Subdomain ID	Sub-domain ID.
press CTRL_C to break	You can press CTRL+C to stop the ongoing tracert test.
TTL	Remaining Time to Live.
Replier(BFR-ID)	IPv6 address of the intermediate node that returns the response packet (bit forwarding router ID).
Time	Round-trip time (RTT), in milliseconds.
Type	Node type. The options are as follows: Ingress: ingress node. Transit: transit node. Bud: both an egress node and a transit node. Egress: egress node.
BSL	Bit string length.
BFRID	Bit forwarding router ID.