Users Guide

Description Behavior at Peer Up Behavior During Run
Time
Action to Take
and when it drops below
80%.
Domain ID mismatch
The VLT peer does not
boot up. The VLTi is
forced to a down state.
A syslog error message
and an SNMP trap are
generated.
The VLT peer does not
boot up. The VLTi is
forced to a down state.
A syslog error message
and an SNMP trap are
generated.
Verify the domain ID
matches on both VLT
peers.
Dell Networking OS
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 Dell
Networking OS 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 Dell
Networking OS software
versions on the VLT peers
is compatible. For more
Virtual Link Trunking (VLT) 1066