IBM 8285 Nways, Installation And User Manual

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Problems with ATM Forum Compliant LAN Emulation
This section details the problems that may occur during the setup of an ATM Forum compliant LAN
emulation environment.
Workgroup Switch LEC Cannot Initialize to the LES/BUS
First: Use the SHOW DEVICE command and look at the subnet lan emulation status message:
If the message is:
Abnormal Termination: LES connection cleared. ATM Forum cause xx.
follow the steps below that correspond the cause code:
1 Explanation: A wrong LES address was entered using the SET DEVICE LAN_EMULATION_CLIENT
command (
les_atm_addressr parameter), or the port attached to the LES is not in service.
Steps to Take:
1. Check if the port status is UP-OKAY (via the SHOW PORT command), then check that the LES ATM
address is exactly the same as the one entered in the workgroup switch.
3 Steps to Take:
1. If the LE server is in the same cluster (SSI links):
Ÿ An SSI port has not enough bandwidth. Having several SSI ports on the module may reach the
bandwidth limit.
Spread the SSI ports over several modules.
Ÿ The ATM address of an workgroup switch located on the PING path has been changed.
Disable the SSI link and re-enable it.
If the above does not solve the problem, take a TRS dump (with the DUMP TRS command), and contact
your IBM service representative.
2. If the LE server is in another cluster (NNI links):
Ÿ The NNI network-side/user-side definition rules have not been applied.
Check that one side of the NNI link is defined as user, and that the other side is defined as network.
Ÿ No logical-link has been defined for the NNI port.
Define the logical link, using the SET LOGICAL_LINK command.
Ÿ
The peer logical links do not match (bad vpi match, bad cluster match, bad bandwidth match).
Check that the logical links on both sides do match, and if necessary, clear those logical links are
re-define them.
Ÿ No static route has been defined, if the workgroup switch and the LE server are in different ATM
subnetworks.
Define the static routes using the SET STATIC_ROUTE command.
Ÿ A static route was badly configured.
Check the static routes, using the SHOW STATIC_ROUTE command.
Ÿ
The VP-tunnel is defective.
Ask your VP-tunnel provider to test it.
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IBM 8285 Nways ATM Workgroup Switch: Installation and User’s Guide