Troubleshooting Guide

Name Description
• pseudoRandomBitSequenceCrc: pseudo-random-
bit-sequence with cyclic redundancy check with 32-
bit polynomial.
A cyclic redundancy check is a code that detects
errors. The default value is allZero.
DataSize Specifies an arbitrary amount of data to be included
in the data TLV, if the data size is selected to be
sent. The default is 0.
FrameSize Specifies the frame size. If the frame size is specified
then the data size is internally calculated and the
calculated data size is included in the data TLV. The
default is 0.
SourceMode Specifies the source mode of the transmit loopback
service:
• nodal
• noVlanMac — Use this value with C-VLAN only.
When you select this option, even if a VLAN MAC
address exists, the system uses the CFM C-MAC
as the BMAC-SA.
• smltVirtual — Use the smltVirtual option with B-
VLANs only.
The default is nodal.
SeqNumber The transaction identifier/sequence number of the
first loopback message (to be) sent. The default is 0.
Result Displays the Layer 2 Ping result.
Initiating a Layer 2 traceroute
Use this procedure to trigger a Layer 2 traceroute. This feature enables CFM to debug Layer 2 in an
SPBM cloud or network. It can determine the path used by IS—IS to get from one MEP to another,
by showing all the hops between. Therefore, it can show where connectivity is lost. It can also work
for IP shortcuts.
Note:
In the current release, troubleshooting using ping and traceroute (including Layer 2 ping and
Layer 2 traceroute) is not supported on EDM. For more information, see Release Notes for VSP
Operating System Software, NN47227-401. As an alternative, use the ACLI.
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.
For more information on configuring tracetree, see Configuring Layer 2 tracetree on page 210.
CFM configuration using EDM
January 2017 Troubleshooting 193
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