Troubleshooting Guide

address of an MP, which is the SPBM system ID or the virtual SMLT MAC. MPs on the path to the
target address respond with an LTR.
Before you begin
• You must have a MEP that is associated with a VLAN.
Procedure
Trigger the linktrace:
linktrace WORD<0–22> WORD<0–22> <1–8191> <0x00:0x00:0x00:0x00:0x00:0x00>
[detail] [priority <0–7>] [source-mode <nodal|noVlanMac|smltVirtual>]
[ttl-value <1–255>]
Example
VSP-4850GTS# linktrace md1 4001 13 00:bb:00:00:14:00 priority 7
Please wait for LTM to complete or press any key to abort
Received LTRs:
SeqNum: 10575 MD: md1 MA:4001 MepId: 13 Priority: 7
--------------------------------------------------------------
TTL SRC MAC FWDYES TERMMEP RELAY ACTION
--- ------------------ ------ -------- ----------------------
63 00:bb:00:00:10:00 true false Fdb
62 00:bb:00:00:14:00 false true Hit
Variable definitions
Use the data in the following table to use the linktrace command.
Variable
Value
WORD<0–22> The first parameter, specifies the MD name.
WORD<0–22> The second parameter, specifies the MA name.
<1–8191> Specifies the MEP ID.
<0x00:0x00:0x00:0x00:0x00:0x00> Specifies the target MAC address to reach the MEP.
detail Displays linktrace result details.
priority <0–7> Specifies the priority. The default is 7.
source-mode<nodal|noVlanMac|
smltVirtual>
Specifies the source mode:
• 1: 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.
• 2: smltVirtual—Use this value with B-VLANs only.
The default is 1: nodal.
ttl-value <1–255> Specifies the Time-to-Live value. The default is 64.
Operations and Management
January 2017 Troubleshooting 170
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