tracert multicast-lsp

Function

The tracert multicast-lsp command checks the connectivity of a point to multi-point VPLS over P2MP, NGMVPN, static MLDP.

Format

tracert multicast-lsp [ -a source-ip | -exp exp-value | -h ttl-value | -r reply-mode | -t timeout | -j jitter-value | t-flag ] ^* mldp p2mp root-ip root-ip-address { lsp-id lsp-id | opaque-value opaque-value } [ detail ]

Parameters

Parameter	Description	Value
-a source-ip	Source IP address of MPLS echo request messages to be sent. If no source IP address is specified, the outbound interface's IP address is used as the source IP address of MPLS echo request messages to be sent.	The value is in dotted decimal notation.
-exp exp-value	Specifies the EXP value of MPLS echo request messages to be sent. The EXP value indicates the packet priority.	The value is an integer ranging from 0 to 7. The default value is 0.
-h ttl-value	Specifies the TTL value of MPLS echo request messages to be sent. The TTL value in the IP header specifies the lifetime of a datagram and the maximum hops the datagram goes through. The TTL value is set by the source node that sends a datagram. Each time a datagram passes a routing device, the TTL value is decreased by 1. When the TTL value becomes 0 on a routing device, the routing device discards the datagram and sends a timeout message to the source node.	The value is an integer ranging from 1 to 255. When the mldp p2mp root-ip parameter is specified, the default value of the parameter is 255. When the te-auto-tunnel parameter is specified, the default value of the parameter is 64.
-r reply-mode	Specifies the mode in which the peer responds with MPLS echo reply messages.	The value is an integer ranging from 1 to 2. The default value is 2. 1: no reply This mode is used in unidirectional tests. The test is successful if the source node displays a timeout message. The test fails if the system displays a message showing that the Label Switched Path (LSP) does not exist. 2: reply with an IPv4 or IPv6 UDP packet
-t timeout	Specifies the timeout period for waiting for MPLS echo reply messages.	The value is an integer ranging from 2000 to 65535, in milliseconds. The default value is 2000.
-j jitter-value	Specifies a delay after which the destination node responds with an MPLS echo reply message.	The value is an integer ranging from 0 to 1000.
t-flag	Indicates that a node responds with an MPLS echo reply message only after it receives a TTL timeout message.	-
mldp	Specifies multipoint extensions for LDP.	-
p2mp	Specifies the point to multi-point..	-
root-ip root-ip-address	Specifies the IP address of the root node on a Point-to-Multipoint (P2MP) Label Distribution Protocol (LDP) LSP.	The value is in dotted decimal notation.
lsp-id lsp-id	Specifies the P2MP LDP LSP ID.	The value is an integer ranging from 0 to 4294967295.
opaque-value opaque-value	Specifies information used to uniquely identify a P2MP LDP LSP.	The value is an integer ranging from 1 to 254.
detail	Display detailed information.	-
te-auto-tunnel auto-tunnel-name	Specifies the interface type of the auto TE tunnel.	-
leaf-destination leaf-destination	Specifies the destination node on a sub-LSP of a P2MP TE tunnel.	The value is in dotted decimal notation.

Views

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Default Level

0: Visit level

Task Name and Operations

Task Name	Operations
sla	execute

Usage Guidelines

Usage Scenario

To check the connectivity of a point to multi-point VPLS over P2MP, NGMVPN, static MLDP, run the tracert multicast-lsp command.

To check the P2MP LDP LSP connectivity, run the tracert multicast-lsp mldp p2mp root-ip command.
To check the connectivity of a P2MP TE tunnel that is automatically generated, run the tracert multicast-lsp te-auto-tunnel command.

Example

# Use tracert to check path information about a P2MP TE tunnel.

<HUAWEI> tracert multicast-lsp -h 2 te-auto-tunnel P2MPoh5121
  LSP Trace Route FEC: RSVP P2MP IPv4 P2MP-Auto-tunnel P2MPoh5121 , press CTRL_C to break.
  TTL   Replier            Time    Type      Downstream
  1     2.2.2.2            30 ms   Bud       172.16.3.2/[1048575 ]
  1     4.1.1.2            40 ms   Transit   5.1.1.2/[900001 ]
  2     2.2.2.2            30 ms   Bud       172.16.3.2/[1048575 ]
  2     6.6.6.6            60 ms   Egress
  2     3.3.3.3            80 ms   Egress
  2     5.5.5.5            80 ms   Egress

# Use tracert to check path information about a P2MP LDP LSP.

<HUAWEI> tracert multicast-lsp -h 10 mldp p2mp root-ip 1.1.1.1 lsp-id 1
  LSP Trace Route FEC: Multicast P2MP LDP , press CTRL_C to break.
  TTL   Replier            Time    Type      Downstream
  1     192.168.1.9        40 ms   Transit   192.168.2.12/[1024 ]
  2     10.10.10.10        110 ms  Egress
  3     10.10.10.10        140 ms  Egress
  4     10.10.10.10        50 ms   Egress
  5     10.10.10.10        70 ms   Egress
  6     10.10.10.10        80 ms   Egress
  7     10.10.10.10        70 ms   Egress
  8     10.10.10.10        30 ms   Egress
  9     10.10.10.10        60 ms   Egress
  10    10.10.10.10        110 ms  Egress

**Table 1** Description of the **tracert multicast-lsp** command output
Item	Description
TTL	Sequence of the hop.
Replier	IP address of an intermediate node that responds with an MPLS echo reply message.
Time	Round-trip time (RTT), in milliseconds.
Type	Node type. The value can be: Ingress. Transit. Branch. Bud. Egress.
Downstream	Next-hop IP address and pushed label value.