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This soft copy for use by IBM employees only.
To enable connectivity between the switches, we configure an SSI connection
between them. This is done using the SET PORT command:
8285> set port 1.13 enable ssi 155000
When setting up your SSI parameters, make certain that you satisfy the following
conditions:
1. The ATM network address (the first 11 bytes of the ATM address) for each
switch is the same.
2. The ATM cluster number (11th byte of the ATM address) is the same on each
switch.
3. The hub numbers (13th byte of the ATM address) are different.
Even though the port may be physically up, that is receiving and transmitting
properly, if it is misconfigurated, it will be reported as being not in service. If
this happens, The 8285 will try to provide helpful error messages in the IX Status
field returned by the SHOW PORT command with the VERBOSE option.
8285> show port 1.13 verbose
Type Mode Status
-------------------------------------------------------------------------------
1.13:SSI enabled UP-NOT IN SERVICE
SSI Bandwidth : 155000 Kbps
Connector : SC DUPLEX
Media : Multimode fiber
Port speed : 155000 Kbps
Remote device is active
IX status : HUB numbers identical
Scrambling mode : frame and cell
Clock mode : internal
A list of some of these messages is given in Table 34.
Table 34 (Page 1 of 2). IX Status Messages and Causes
IX Status Message Possible Causes Suggestions
IX OK Link is configured
properly and active.
None.
Attached to non SSI port Remote device is not
configured to support the
SSI protocol.
Disable the remote port,
then enable it for SSI.
Hub numbers identical Both switches have the
same ATM network
prefix.
Change the ATM address
of one of the switches so
that at least the hub
number is different.
130 ATM Workgroup Solutions: Implementing the 8285 ATM Switch