System information

Chapter 4. ATM LAN backbone interoperability and migration 75
DUAL-PHY OC-3 blade in the Catalyst 5500 switch implements the other
MPOA client.
In Appendix A, “IBM 8265 configuration for the MPOA test” on page 119, we
have included displays of some
show commands showing some of the
configuration of the IBM 8265 switch. The IBM 8270 was attached to port
14.3, and the Catalyst 5500 was attached to port 16.3.
The interoperability test consisted of the following four major steps:
1. Configuration of IBM 8265 MSS (MPOA Server)
2. Configuration of IBM 8270 MSS client (MPC)
3. Configuration of Catalyst 5500 dual port OC-3 ATM module with MPC
4. Verification of shortcut routing taking place
The environment we are building is fairly complex, and there are several
pieces that must fall into place for the interoperability test to be successful.
However, we would like to assure you that we succeeded in what we set out
to do. We attribute this to a strong standard and skillful product
implementations.
Here are the essential features that must be understood and properly
configured for interoperability:
a. UNI signalling.
It is recommended that you hard code the UNI versions when working
in a mixed vendor environment. The OC-3 adapter in the 8265 switch is
set to auto, in order for the adapter to find out what UNI version the
client is running. The OC-3 interface in our 8270 switch is set to V3.0,
and the interface in the Cisco 5500 Switch is set to V3.1. The 8265
switch negotiates the signalling version to be used between the
connected devices and will show V3.1 for the connection to 5500 and
V3.0 for the 8270.
It is recommended that you hard code UNI versions when working in
a mixed environment. It is also recommended that you set all the UNI
versions to the same fixed value to avoid conversion between
different UNI versions.
The use of UNI 3.0 here is for test purposes only.
Note