ATM Configuration and Troubleshooting Guide

Troubleshooting
Troubleshooting LAN Emulation
Chapter 9 233
If the MAC-to-ATM address mapping is displayed, but the VPI/VCI
numbers are not displayed, then the destination system is known to the
LES, but the Data Direct VC cannot be set up between the source and
destination. Do the following:
Step 1. Check that the maximum number of VCCs that can be run
simultaneously has not been reached. To see the number of VCCs
allowed and the number currently used, type this command:
atmmgr card_inst_num show -c
If the maximum has already been reached, no more VCs can be opened
until an existing VC is closed.
Step 2. Check that the traffic configuration between the two systems is not
incompatible/inoperable (see Table 5-4 on page 70). If this is the case,
then the connection will be refused. Reconfigure the traffic parameters
on one or both systems so that they are compatible.
Step 3. Use your VC matrix (see “Creating a VC Matrix” on page 65) to check
that there is enough bandwidth available to allow the connection to be
set up.
If there is not enough bandwidth available, free some by deleting any
unused VCs, if possible.
NOTE For HP-HSC and HP-PCI ATM adapters:
You can use atmcheck and atmserver to check that connectivity is
possible between the two ATM end systems.
The atmcheck and atmserver commands test the connectivity of two
ATM interfaces on HP systems up to the ATM layer, and confirm if an
SVC can be opened to the destination. If atmcheck is successful, check
that both systems have correctly configured IP addresses, as described in
“Checking Source/Destination ELAN IP I/F Configurations” on page 234.
If atmcheck is not successful, the two systems are unable to
communicate. Check that both systems’ hardware and software are
working correctly, as described on “Troubleshooting the ATM Adapter
and Software Installation” on page 190.