Configure Layer 2 Trace Multicast Route on a VLAN

Use this procedure to configure the Layer 2 tracemroute on the VLAN (Layer 2). This procedure queries the SPBM multicast module to determine the B-VLAN, I-SID, and nickname for the S and G streams. The nickname and I-SID are used to create a multicast MAC address.

Note

If you want to run a Layer 2 tracemroute on a VRF, make sure you are in the proper VRF context.

Before you begin

On the source and destination nodes, you must configure a CFM MD, MA, and MEP, and assign a nodal MEP to the B-VLAN.

Procedure

In the navigation pane, expand Configuration > Serviceability > Diagnostics > L2Ping/L2Trace Route.
Select the L2MCAST Traceroute tab.
Select Insert to insert the Layer 2 MCAST Traceroute.
Enter the SrcIpAddr.
Enter the GroupIpAddr.
Enter the ServiceType. If you want to perform a Layer 2 tracemroute on a VLAN, select vlan. If you want to perform a Layer 2 tracemroute on a Layer 3 GRT, select vrfid.

Note

If you want to perform a Layer 2 tracemroute on a Layer 2 or a Layer 3 VRF, review the following procedure Configuring Layer 2 tracemroute on a VRF.
In the ServiceId field, enter the VLAN ID.
Enter the Priority.
Enter the Ttl value.
Select Insert.
Select Apply to save your changes.
To start the Layer 2 tracemoute, set the Status to transmit and select Start.
Update the Layer 2 tracemroute by selecting Refresh .
To stop the Layer 2 tracemroute, select Stop .
To see the result, select Result.

L2 MCAST Traceroute Field Descriptions

Use the data in the following table to use the L2 MCAST Traceroute tab.


Name	Description
SrcIpAddrType	Specifies the source IP address type as IPv4.
SrcIpAddr	Specifies the source IP address of the flow where the multicast trace tree originates.
GroupIpAddrType	Specifies the group IP address type as IPv4.
GroupIpAddr	Specifies the group IP address.
ServiceType	Specifies where you configure the Layer 2 tracemroute. This is either VLAN or VRF.
ServiceId	Specifies the VLAN ID.
VRFName	Specifies the VRF name.
Priority	Specifies the priority value. The value is between 0 and 7.
Ttl	Specifies the returned trace response. The TTL value is between 1 and 255.
SeqNumber	Specifies the transaction identifier/sequence number of the first message to be sent.
Status	Specifies the status of the transmit loopback service: ready: Specifies the service is available. transmit: Specifies the service is transmitting, or about to transmit the trace messages. abort: Specifies the services is aborted or about to abort the trace messages. The column will also be used to avoid concurrency or race condition problems that can occur if two or more management entities try to use the service at the same time.
ResultOK	Specifies the result of the operation: true: The trace messages will be or have been sent. false: The trace messages will not be sent.
Flag	Specifies the result flag indicating that the Layer 2 trace status or error code. Each value represents a status or error case. 1 — No error 2 — Internal Error 3 — Mep must be enabled to perform the trace 4 — No response received 5 — Trace completed 6 — On a leaf node in the I-SID tree 7 — No data I-SID was found for S, G