View Layer 2 Traceroute Results

Use this procedure to view Layer 2 traceroute results. This feature enables CFM to debug Layer 2. It can also help you debug ARP problems by providing the ability to troubleshoot next hop ARP records.

About this task

You can display Layer 2 tracetree results to view a multicast tree on the SPBM B-VLAN from the source node to the destination nodes for a particular I-SID. For more information, see View Layer 2 Tracetree Results.

Procedure

  1. In the navigation pane, expand Configuration > Serviceability > Diagnostics.
  2. Select L2Ping/L2Trace Route.
  3. Select the L2Traceroute/TraceTree tab.
  4. Select Refresh to update the results.
  5. To view the traceroute results, highlight an entry, and then select Result.

L2 Traceroute/Tracetree Result Field Descriptions

Use the data in the following table to use the L2 Traceroute/Tracetree Result tab.

Name

Description

VlanId

A value that uniquely identifies the Backbone VLAN (B-VLAN).

SeqNumber

The transaction identifier/sequence number returned by a previous transmit linktrace message command, indicating which L2Trace's response of the L2Trace is going to be returned. The default is 0.

Hop

The number of hops away from L2Trace initiator.

ReceiveOrder

An index to distinguish among multiple L2Trace responses with the same Transaction Identifier field value. This value is assigned sequentially from 1, in the order that the Linktrace Initiator received the responses.

Ttl

Time-to-Live (TTL) field value for a returned L2Trace response.

SrcMac

MAC address of the MP that responds to the L2Trace request for this L2TraceReply.

HostName

The host name of the replying node.

LastSrcMac

The MAC address of the node that forwarded the L2Trace to the responding node.

LastHostName

The host name of the node that forwarded the L2Trace to the responding node.