Cisco MGX 8850 PXM45 Release Notes page 26

Limitations, Restrictions, and Notes
The VC and COSB thresholds are updated as and when the links are added or deleted from the IMA
•
groups. The thresholds for the connections added when there are N links in the group can differ from
the connections added when there are (N+1) links in the IMA group.
• Round trip propagation delay of more than 1 second on IMA links is not supported.
• The CLI clrimadelay or the corresponding SNMP set operation is issued to remove accumulated
delay from an IMA group. While delay is being removed, the following CLIs must not be executed.
They will return error if issued. The corresponding SNMP set operations will also be rejected:
–
–
–
–
–
–
–
–
–
–
–
–
Any of the following operations can extend the delay removal completion by 9 seconds.
•
–
–
–
–
Then the group will be restarted and it may take another 3 seconds to become operational. The group
will be restarted even if the delay process completes sooner and any of the operations listed above
occurs.
GTSM (Group Traffic State Machine) UP and DOWN integration times should be configured to a
•
value of 0 for all IMA groups. Any positive value, especially the UP time, will delay the operational
state of any port(s), configured on the IMA group, from becoming active. This can cause more than
desired traffic loss during a card switchover.
BERT is supported only on the T1 interfaces. It is not supported on the E1 interfaces.
•
Sub-slot and port identifiers do not correspond to the exact physical attribute for IMA and
•
channelized interfaces as they used to in the old unchannelized interfaces. Refer to the DDTs issue
CSCdy08500 for more information. The following apply to the AXSM-32-T1E1-E card in Release
3.0.10:
–
–
Release Notes for Cisco MGX 8850 (PXM45), MGX 8850 (PXM1E), and MGX 8830, Software Release 3.0.10
26
delimagrp
cnfatmimagrp
cnfimagrp
upimagrp
dnimagrp
rstrtimagrp
addimalnk
clrimadelay
startimalnktst
cnfimalnktst
stopimalnktst
delimalnk
IMA link deletion at *FE*
IMA group restart at *FE*
IMA link transition into Unusable state at *FE*
IMA link entrance into LIF failure at *NE*
If the logical port on the SM is deleted, the corresponding pnport on the controller, that is,
PXM45, should be deleted.
The port number in the pnport (shelf.slot:subslot.port:subport) could be a random number. The
user should not interpret this number as line or IMA group number.
OL-2914-01 Rev D0, July 3, 2003