Nortel Networks NN43001-563 - Manual (Page 430)

430 Appendix A Patches and advisements
IP Trunk 3.01.22 patches
The patches applicable to IP Trunk 3.01.22 are:
• MPLR18142
• MPLR18157
MPLR18142
FIN_WAIT_2 socket loss 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 Trunk 3.0 (3.00.53) nodes to
IP Trunk 3.01 (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 Trunk card to reboot. One scenario
where this problem might occur is:
1. Two IP 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 blocking of
valid anti-tromboning requests to prevent call swaps with the Trunk
Anti-Tromboning (TAT) enhancement. The Endpoint ID (EPID) is new in
IP Trunk 3.01.
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 Trunk 3.0 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 prevent malfunction or reboot, do one of the following:
• upgrade all existing IP Trunk nodes to IP Trunk 3.01 in a single
maintenance window; or
• install patch MPLR17662 on all existing IP Trunks first. Only then can
the customer upgrade the existing IP Trunk nodes gradually, node by
node, to IP Trunk 3.01.
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 01.01 Standard
Release 5.0 30 May 2007
Copyright © 2007, Nortel Networks
.