Troubleshooting Atm; Link State Error In Ipoa Application; Link Report Error In Pppoa Application; Ping Failure - HPE FlexNetwork MSR series Configuration Manual

Troubleshooting ATM

Link state error in IPoA application

Symptom
When IPoA is used, the link state is down.
Solution
•
Verify that the optical fiber is connected correctly.
•
Verify that the local IP address is configured.
•
Verify that the PVC is successfully created.

Link report error in PPPoA application

Symptom
When PPPoA is used, the link cannot be up.
Solution
See "Link state error in IPoA

Ping failure

Symptom
The physical layer of the interfaces and the line protocol are both up, but they cannot ping each
other.
Solution
•
If IPoA is used, make sure 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
address must have the same VPI/VCI value as the remote PVC mapped to the local IP address.
•
If two routers are connected back-to-back, make sure at least one of interfaces uses internal
transmission clock (master). If the routers are connected to the ATM network, the transmission
clock must be set to line clock (slave).
•
Verify that the ATM interfaces of the two sides are of the same type. For example, both sides
use multi-mode fiber interfaces, single-mode fiber interfaces, or multi-mode fiber interfaces but
connected using single-mode fiber. If a multi-mode fiber interface and a single-mode fiber
interface are directly connected, they can communicate in most cases, but sometimes with
frequent packet dropping and CRC errors.
•
If the two ends use PPPoA, make sure their IP addresses and authentication parameters are
correctly configured.
•
If the output from the ping command shows that only small packets can pass, check the MTU
settings of both router interfaces.

PVC state is down when ATM interface state is up

Symptom
The state of the ATM interface is up, but the PVC state is down.
application."
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