tracert vpls [ -exp exp-value | -f first-ttl | -m max-ttl | -r reply-mode | -t timeout-value | -g ] * vsi vsi-name peer peer-address [ negotiate-vc-id vc-id ] [ full-lsp-path ] [ control-word ] [ pipe | uniform ] [ detail ] [ bypass -si { interface-name | interface-type interface-number } ]
tracert vpls [ -exp exp-value | -f first-ttl | -m max-ttl | -r reply-mode | -t timeout-value | -g ] * vsi vsi-name local-site-id remote-site-id [ full-lsp-path ] [ detail ] [ bypass -si { interface-name | interface-type interface-number } ]
| Parameter | Description | Value |
|---|---|---|
| -exp exp-value |
Specifies the value of the EXP field in the outer label of an Echo Request packet. |
The value is an integer ranging from 0 to 7. |
| -f first-ttl |
Specifies the initial TTL value. |
The value is an integer ranging from 1 to 255. The value must be less than max-ttl. The default value is 1. |
| -m max-ttl |
Specifies the maximum value of the TTL. |
The value is an integer ranging from 1 to 255. The value must be greater than first-ttl. The default value is 30. |
| -r reply-mode |
Specifies the mode of sending an Echo Reply packet. The meaning of each value is as follows: |
The value is an integer ranging from 1 to 4.The default value is 2.
|
| -t timeout-value |
Specifies the timeout period of sending Echo Reply packets. |
The value is a decimal integer ranging from 0 to 65535, in milliseconds. The default value is 2000. |
| -g |
Performs the test using MPLS fragments. |
- |
| vsi vsi-name |
Specifies a VPN name. |
The value is a string of 1 to 31 case-sensitive characters, spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string. |
| peer peer-address |
Specifies the IP address of a peer PE. |
The value is in dotted decimal notation. |
| negotiate-vc-id vc-id |
Specifies the ID of the local PW. |
The value is a decimal integer ranging from 1 to 4294967295. |
| full-lsp-path |
Displays information about responses from all nodes to the Echo Request packets along an LSP. If this parameter is not specified, only the responses from the PW nodes along the LSP are displayed. |
- |
| control-word |
Indicates that the control word is encapsulated into a packet. When detecting an MS-PW, you can specify control-word that supports MS-PW detection only in LDP mode on a VPLS network. |
- |
| pipe |
Specifies the pipe mode. In this mode, when a probe packet passes through an MPLS domain, the IP TTL value is decreased by 1 only on the ingress and egress nodes. The MPLS domain is considered a hop. |
- |
| uniform |
Specifies the uniform mode. In this mode, the IP TTL value is decreased by 1 each time a probe packet passes through one hop in the MPLS domain. |
- |
| detail |
Displays details carried in MPLS Echo Reply packets. |
- |
| bypass |
Forwards packets through a specified public backup LSP of a VPLS PW. If this parameter is specified on the ingress interface, packets sent from the initiator are forwarded through the public backup LSP. In a hybrid load balancing scenario, if multiple backup LSPs exist, packets are forwarded through a randomly selected LSP rather than any specified backup LSP. If reply packets are transmitted through an application-plane control channel, the PEs at both ends of a PW must have protection paths configured. Otherwise, when the peer PE does not have any public backup LSP, PW tracert reply packets cannot be returned. |
- |
| -si interface-name |
Specifies the name of an inbound interface for MPLS Echo Request packets. You can simulate packet sending on the remote device and check whether the forwarding path of packets entering from the inbound interface is faulty. |
- |
| interface-type |
Specifies the type of an inbound interface for MPLS Echo Request packets. You can simulate packet sending on the remote device and check whether the forwarding path of packets entering from the inbound interface is faulty. |
- |
| interface-number |
Specifies the number of an inbound interface for MPLS Echo Request packets. You can simulate packet sending on the remote device and check whether the forwarding path of packets entering from the inbound interface is faulty. |
- |
| local-site-id |
Specifies the ID of the local CE. |
The value is a decimal integer ranging from 0 to 65534. |
| remote-site-id |
Specifies the ID of the remote CE. |
The value is a decimal integer ranging from 0 to 65534. |
Usage Scenario
After VPLS configurations are complete, run the tracert vpls command to locate a faulty forwarding node along the PW.
Prerequisites
Basic VPLS configurations are complete.
Precautions
<HUAWEI> tracert vpls vsi v1 peer 4.4.4.4 full-lsp-path bypass -si GigabitEthernet0/1/1 PW Trace Route : FEC 128 PSEUDOWIRE (NEW). Type = vlan, ID = 1, press CTRL_C to break TTL Replier Time Type Downstream 0 Ingress 10.1.1.2/[300 1 32803 ] 1 10.1.1.2 2 ms Transit 10.2.1.2/[200 ] 2 4.4.4.4 3 ms Egress
<HUAWEI> tracert vpls vsi v1 1 2 full-lsp-path bypass -si GigabitEthernet0/1/1 PW Trace Route FEC: L2 VPN ENDPOINT. Sender VEID = 1, Remote VEID = 2, press CTRL_C to break TTL Replier Time Type Downstream 0 Ingress 10.1.1.2/[32980 1 368641 ] 1 10.1.1.2 9 ms Transit 10.2.1.1/[3 ] 2 4.4.4.4 6 ms Egress
<HUAWEI> tracert vpls vsi v1 10 10
PW Trace Route FEC: L2 VPN ENDPOINT. Sender VEID = 10, Remote VEID = 20, press CTRL_C to break
TTL Replier Time Type Downstream
0 Ingress 10.1.1.2/[294929 32894 32888 ]
3 4.4.4.4 4 ms Egress
<HUAWEI> tracert vpls vsi test 10 10 full-lsp-path
PW Trace Route FEC: L2 VPN ENDPOINT. Sender VEID = 10, Remote VEID = 20, press CTRL_C to break
TTL Replier Time Type Downstream
0 Ingress 10.1.1.2/[294929 32894 32888 ]
1 10.1.1.2 93 ms Transit 10.2.1.2/[32925 3 ]
2 10.2.1.2 1 ms Transit 10.3.1.2/[32881 ]
3 4.4.4.4 2 ms Egress
| Item | Description |
|---|---|
| Type | Type of nodes:
|
| TTL | TTL in an echo request packet, indicating the number of hops of the tunnel, through which an echo request packet passes. |
| Replier | IP address of the node sending echo reply packets. |
| Time | Time (in ms) that the packet is processed. |
| Downstream | IP address and label of the downstream node. |