Configure a Layer 2 Tracetree
Use this procedure to configure a Layer 2 Tracetree. This feature enables CFM to debug Layer 2. Layer 2 Tracetree allows a user to trigger a multicast LTM message by specifying the B-VLAN and I-SID. The command allows the user to view a multicast tree on the SPBM B-VLAN from the source node to the destination nodes for a particular I-SID.
Note
Troubleshooting using ping and traceroute is not supported on EDM. For more information, see VOSS Release Notes. As an alternative, use CLI.
Before you begin
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On the source and destination nodes, you must configure a CFM MD, MA, and MEP.
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Enable the MEP.
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Assign a nodal MEP to the B-VLAN.
About this task
If you configure IsTraceTree to false, then EDM performs Traceroute on the unicast path. If you configure IsTraceTree to true, then EDM performs TraceTree on the multicast tree.
Note
This command is supported on SPBM B-VLANs only, not C-VLANs.
Procedure
- In the navigation pane, expand .
- Select L2Ping/L2Trace Route.
- From the L2 Traceroute/TraceTree tab, configure the Layer 2 tracetree properties.
- In the IsTraceTree field double-click and select true for EDM to perform Tracetree on the multicast tree.
- Select Apply.
- Select Refresh to update the results.
L2Tracetree Field Descriptions
Use the data in the following table to use the L2Tracetree tab.
|
Name |
Description |
|---|---|
|
VlanId |
Identifies the Backbone VLAN. |
|
Priority |
Specifies a 3–bit value to be used in the VLAN header, if present in the transmitted frame. The default is 7. |
|
DestMacAddress |
Specifies the target MAC address. |
|
HostName |
Specifies the target host name. |
|
DestIsHostName |
Indicates whether the host name is (true) or is not (false) used for L2Tracetree transmission. |
|
Isid |
Specifies the service instance identifier (I-SID). |
|
IsTraceTree |
Specifies whether the multicast tree or unicast path is traced. If you configure IsTraceTree to false then EDM performs Traceroute on the unicast path. If you configure IsTraceTree to true then EDM performs TraceTree on the multicast tree. |
|
Status |
Specifies the status of the transmit loopback service:
This field is also 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. The default is ready. |
|
ResultOk |
Indicates the result of the operation:
The default is true. |
|
Ttl |
Specifies the Time-to-Live value. Indicates the number of hops remaining to this L2Tracetree. The tracetree is decremented by one by each bridge that handles the Layer 2 tracetree and the decremented value is returned to the tracetree. If the output is 0, then the L2Tracetree is not transmitted to the next hop. The value of the TTL field in the L2Tracetree is transmitted by the originating MEP is controlled by a managed object. The default is 64. |
|
SourceMode |
Specifies the source mode of the transmit loopback service:
The default is nodal. |
|
SeqNumber |
The transaction identifier/sequence number of the first loopback message (to be) sent. The default is 0. |
|
Flag |
Specifies the L2Tracetree result flag, which indicates the L2Tracetree status or error code. Each sum represents a status or error:
|