Using Tracert to Test the Forwarding Path on an EVPN VPWS Network

A tracert operation can be performed to locate an EVPN VPWS tunnel forwarding fault.

Prerequisites

Before running the tracert evpn vpws command to locate a forwarding fault on an EVPN VPWS network, ensure that the EVPN VPWS network has been correctly configured.

Context

After EVPN VPWS configurations are complete, perform the following operation in any view of the client.

Procedure

Locate a forwarding fault on an EVPN VPWS network.
- When the tunnel type of the EVPN VPWS network is MPLS:
  Run the tracert evpn vpws local-ce-id remote-ce-id [ vpn-instance evpn-name ] [ control-word ] [ -a source-ip | -exp exp-value | -s packet-size | -t timeout | -h max-ttl | -r reply-mode | -tc tc ] ^* [ pipe | uniform ] command to check the EVPN VPWS status and locate the faulty node on the EVPN VPWS path.
  
  In cross-domain scenarios, the control-word keyword must be specified, and the -r 4 mode is recommended.
- When the tunnel type of the EVPN VPWS network is SRv6:
  Run the tracert evpn vpws local-ce-id remote-ce-id [ vpn-instance evpn-name ] [ end-op endOp ] [ -a source-ip | -exp exp-value | -s packet-size | -t timeout | -h max-ttl | -r reply-mode | -tc tc | -service-class classValue ] ^* [ pipe | uniform ] command to check the EVPN VPWS status and locate the faulty node on the EVPN VPWS path.
If the local service ID is not globally unique, the vpn-instance evpn-name parameter must be specified.

The following shows an example:

# Perform a tracert operation on an EVPN VPWS network.
```
<HUAWEI> tracert evpn vpws 1 2
EVPN VPWS TRACE FEC: Local Evpn Vpws Id = 1, Remote Evpn Vpws Id = 2 , press CTRL_C to break 
TTL    Replier            Time    Type      Downstream
 0                                Ingress   10.1.1.1/[3 1 32927] 
 1     10.1.1.1           52 ms   Egress 
```