Reference Guide

Description Behavior at Peer Up Behavior During Run Time Action to Take
FTOS Version mismatch A syslog error message is
generated.
A syslog error message is
generated.
Follow the correct upgrade
procedure for the unit with
the mismatched FTOS
version.
Remote VLT port channel
status
N/A N/A Use the show vlt
detail and show vlt
brief
commands to view
the VLT port channel status
information.
Spanning tree mismatch at
global level
All VLT port channels go
down on both VLT peers. A
syslog error message is
generated.
No traffic is passed on the
port channels.
A one-time informational
syslog message is
generated.
During run time, a loop may
occur as long as the
mismatch lasts.
To resolve, enable RSTP on
both VLT peers.
Spanning tree mismatch at
port level
A syslog error message is
generated.
A one-time informational
syslog message is
generated.
Correct the spanning tree
configuration on the ports.
System MAC mismatch A syslog error message and
an SNMP trap are
generated.
A syslog error message and
an SNMP trap are
generated.
Verify that the unit ID of VLT
peers is not the same on
both units and that the MAC
address is the same on both
units.
Unit ID mismatch
The VLT peer does not boot
up. The VLTi is forced to a
down state.
A syslog error message is
generated.
The VLT peer does not boot
up. The VLTi is forced to a
down state.
A syslog error message is
generated.
Verify the unit ID is correct
on both VLT peers. Unit ID
numbers must be sequential
on peer units; for example, if
Peer 1 is unit ID “0”, Peer 2
unit ID must be “1’.
Version ID mismatch A syslog error message and
an SNMP trap are
generated.
A syslog error message and
an SNMP trap are
generated.
Verify the FTOS software
versions on the VLT peers is
compatible. For more
information, refer to the
Release Notes for this
release.
VLT LAG ID is not
configured on one VLT peer
A syslog error message is
generated. The peer with
the VLT configured remains
active.
A syslog error message is
generated. The peer with
the VLT configured remains
active.
Verify the VLT LAG ID is
configured correctly on
both VLT peers.
VLT LAG ID mismatch
The VLT port channel is
brought down.
A syslog error message is
generated.
The VLT port channel is
brought down.
A syslog error message is
generated.
Perform a mismatch check
after the VLT peer is
established.
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