Configure Layer 2 Tracemroute on a VRF

Use this procedure to configure the Layer 2 tracemroute on the VRF (Layer 3). 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

Note

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

To perform a Layer 3 tracemroute on a VLAN, see Configure Layer 2 Trace Multicast Route on a VLAN.

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

  1. In the navigation pane, expand Configuration > VRF Context View > Set VRF Context View.
  2. Select a VRF, and then select the Launch VRF Context View tab.
  3. In the navigation pane, expand Configuration > Serviceability > Diagnostics > L2Ping/L2Trace Route.
  4. Select the L2MCAST Traceroute tab.
  5. Select Insert .
  6. Type the SrcIpAddr.
  7. Type the GroupIpAddr.
  8. Select the ServiceType. If you want to perform a Layer 2 tracemroute on a Layer 2 VRF, select vlan. If you want to perform a Layer 2 tracemroute on a Layer 3 VRF, select vrfid.
  9. In the ServiceId, type the VLAN ID.
  10. Type the Priority.
  11. Type the Ttl value.
  12. Select Insert.
  13. Select Apply to save your changes.
  14. To start the Layer 2 tracemoute, configure the Status to transmit, and then select Start.
  15. To update the Layer 2 tracemroute, select Refresh .
  16. To stop the Layer 2 tracemroute, select Stop .
  17. 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
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