3Com SuperStack II PathBuilder S330 Reference Manual page 181

Table 11 T1/E1 UNI with IMA Module Alarms (continued)
Alarm Meaning
Bad M The far end frame size M has
changed in an IMA link.
The maximum value for the
frame size on the local device's
serial card must match the
maximum value for the frame
size of the connected device.
The link with the BAD M is
probably misconnected.
Bad Offset Far end ICP cell offset has
changed in an IMA link.
Each IMA group assigns a
unique Transmit offset to each
link in the group. This alarm
means that a link was
operating correctly, but then
received a Transmit offset
already assigned to a previous
link.
A Tx Misconnected alarm is
also generated.
BAD SCCI Status and Change Control
(3Com Patent Indication – the content of the
Pending) ICP cells has changed. The far
end ICP cell SCCI in this link
does not agree with the SCCI
of the other links in the group.
Bad Symmetry The far end group symmetry
has changed in an IMA link.
Duplicated IMA ID An IMA group has received an
IMA ID that has been received
by a previous group. The
second group must have a
unique IMA ID.
Duplicated Link ID Duplicated far end logical link
ID in this IMA group for this
IMA link.
Each IMA group assigns a
unique Transmit link ID to each
link in the group. This link ID
should match the Receive link
ID of the remote end IMA
device. This alarm means that a
link received a Transmit link ID
already assigned to a previous
link.
(continued)
Managing System Alarms
Troubleshooting Steps
Check to make sure the maximum
frame size is set to the same value on
the local and remote ends.
Check the links for proper connection.
Reconnect if necessary.
Check the links for proper connection.
Reconnect if necessary.
Remove the link and stop Tx and Rx
data.
Check for loops and check the IMA
group configuration.
Check the links for proper connection.
Reconnect if necessary.
171