432 Appendix A Patches and advisements
IP Trunk 3.01.22 patches
The patches applicable to IP Trunk3.01.22 are:
MPLR18142
MPLR18157

MPLR18142

FIN_WAIT_2 socketloss and related IXP restart avoidance.

MPLR18157

TLAN subnet info not recognized if QSIG uses 7-bit channel address.
Interoperability with IP Trunk 3.01 (MPLR17662 patch)
When upgrading an existing network of IP Trunk3.0 (3.00.53) nodes to
IP Trunk3.01 (3.01.22), calls from the IP Trunk 3.0 node to the IP Trunk
3.01 node may result in memory being corrupted, causing the IP Trunk
application to malfunction or the IP Trunkcard to reboot. One scenario
where this problem might occur is:
1. TwoIP Trunk nodes, Node-1 and Node-2, are connected over the IP
network.
2. Node-1 is running on IP Trunk 3.0. Node-2 is running on IP Trunk
3.01, which includes message enhancements to avoid the blockingof
valid anti-tromboning requests to prevent call swaps with the Trunk
Anti-Tromboning(TAT)enhancement. The Endpoint ID (EPID) is new in
IP Trunk3.01.
3. The EPID is sent, along with other information, in the SETUP and
CONNECT messages. A call placed from Node-2 to Node-1 includes
this information in the SETUP message.
4. The existing message decoding logic at Node-1, running on IP Trunk
3.0, may incorrectly read the EPID information as ESN5 information.
5. Calls from Node-1 to Node-2 do not have this problem.
Patch MPLR17662, which is put into service on the IP Trunk3.0 node,
prevents this problem. It enables the node to parse and select the correct
information and discard the rest. In this scenario, the patch must be loaded
on Node-1.
In general, to preventmalfunction or reboot, do one of the following:
upgrade all existing IP Trunknodes to IP Trunk 3.01 in a single
maintenance window; or
install patch MPLR17662 on all existing IP Trunksfirst. Only then can
the customer upgrade the existing IP Trunknodes gradually, node by
node, to IP Trunk3.01.
Nortel Communication Server 1000
IP TrunkFundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright© 2007, Nor tel Networks
.