ATM Configuration and Troubleshooting Guide

Troubleshooting

Troubleshooting Classical IP

Chapter 9 209

b. If the UNI version conﬁgured on the ATM adapter is not the same as

that conﬁgured on the switch port to which it is connected, use SAM

to open the “Conﬁgure ATM Card Parameters” screen. Set the UNI

Version ﬁeld to the correct value for your switch.

Step 6. Ensure that the local and remote node are on the same logical LIS (they

must use the same ARP server).

Step 7. Ensure that the remote host and ARP server are running and their ATM

interfaces are correctly conﬁgured.

The command ifconfig can be used to check if the IP interface is UP.

ATM addresses can be speciﬁed manually or assigned dynamically

through ILMI.

Step 8. Ensure that you have conﬁgured all intermediate switches. In particular,

if you conﬁgured a VC with ABR trafﬁc type on both end nodes, you must

also conﬁgure the intermediate switches for ABR.

Step 9. Start logging by using this command: nettl -start. This will ensure

collection of a complete range of information.

Use the following commands to control logging:

• To start logging:

nettl -start

• To stop logging:

nettl -stop

• To select a message mask for the ATM logging activity:

nettl -log disaster error warning informative -entity atm

B Ping the destination address. Use the ping command to test the

network connectivity. Be sure to use the IP address for the ATM interface

on the remote machine, instead of the hostname, because part of the

problem might be an error in the /etc/hosts ﬁle or connectivity with a

name server.

The results from the ping command could look like this:

PING 15.128.131.156: 10 byte packets

10 bytes from 15.128.131.156: icmp_seq=0.

10 bytes from 15.128.131.156: icmp_seq=1.