R3303-HP HSR6800 Routers Layer 2 - WAN Configuration Guide

[RouterA-atm-pvc-Atm1/0/1-0/33-1] quit

[RouterA-Atm1/0/1] pvc 2 0/32

[RouterA-atm-pvc-Atm1/0/1-0/32-2] map ip 202.38.160.3

[RouterA-atm-pvc-Atm1/0/1-0/32-2] service ubr 100000

[RouterA-atm-pvc-Atm1/0/1-0/33-1] transmit-priority 3

After two equal traffic flows exceeding the ATM bandwidth are sent to Router B and Router C, you can

use the display atm pvc-info interface atm 1/0/1 pvc command on Router B and Router C to view

statistics for each PVC (you can make several tests and observe the average statistics). You can see that

the PVC with higher priority receives more packets than that with lower priority. The PVC with the higher

priority takes preference in getting bandwidth and other PVCs (if there are many and with different

priority values), regardless of their priority values, are treated equally in terms of bandwidth allocation.

Troubleshooting ATM

Link state error in IPoA application

Symptom

When IPoA is used, the link state is down.

Solution

Make sure that the optical fiber is connected correctly.

Make sure that the local IP address has been configured.

Make sure that the PVC is successfully created and communication between cards is normal.

Link report error in PPPoA application

Symptom

When PPPoA is used, the link does not report UP.

Solution

See "Link state error in IPoA application."

Ping failure

Symptom

The physical layer of the interfaces and the line protocol are both UP, but when tested with the ping

command, the two ends are mutually unreachable.

Solution

• If IPOA is used, make sure that the IP protocol address mapping is configured correctly. If the

interfaces of two routers are connected back-to-back, the local PVC mapped to the remote IP must

have the same VPI/VCI value as the remote PVC mapped to the local IP. In addition, the IP

addresses of the two ends must also be in the same network segment.