ATM Configuration and Troubleshooting Guide

Troubleshooting

Troubleshooting Classical IP

Chapter 9198

NOTE If you use the ﬂowchart to troubleshoot a PVC that has not been fully

conﬁgured and has no path to the remote node, the Classical IP

mechanism will use SVCs to establish the connection. Consequently, a

problem with the PVC will not be detected and you will be unable to

troubleshoot correctly. If a PVC is fully conﬁgured and is not functioning

properly, an error is returned.

A Start. Before using the ﬂowchart, check these things:

• You must have conﬁgured the IP interfaces on both end nodes using

SAM.

• You must have added a PVC at each end node with the same trafﬁc

proﬁle.

• If the PVC is from a 622 Mbit/s adapter towards a 155 Mbit/s

adapter, you must have conﬁgured a PVC whose peak cell rate is less

than 155 Mbits/s.

• You must have conﬁgured all intermediate switches. In particular, if

you conﬁgured a PVC with ABR trafﬁc type on both end nodes, you

must also conﬁgure the intermediate switches for ABR.

If you manually speciﬁed the IP address attached to the PVC, start the

ﬂowchart.

If you have not manually speciﬁed the IP address, you should ﬁrst check

that the ARP mechanism has successfully retrieved the remote host’s IP

address, as follows:

Step 1. To display the Classical IP ARP table for ATM adapter atm0, use the

command atmmgr 0 show -i, as follows:

Classical IP ARP table

Dest.IP_Address Type Dest.ATM_Address VC VPI,VCI

-------------------------------------------------------------------------------

25.128.169.19 Dynamic - PVC 0,101

25.128.169.64 Dynamic - PVC 0,100