Verifying The Configuration; Troubleshooting Pos Interfaces; Symptom 1; Solution - HP MSR Router Series Configuration Manual

<RouterB> system-view
[RouterB] interface pos 2/2/0
[RouterB-Pos2/2/0] clock master
# Assign an IP address to the interface.
[RouterB-Pos2/2/0] ip address 10.110.1.11 255.255.255.0
# Configure the data link layer protocol and MTU for the interface.
[RouterB-Pos2/2/0] link-protocol ppp
[RouterB-Pos2/2/0] mtu 1500
# Shut down, and then bring up the interface for the MTU setting to take effect.
[RouterB-Pos2/2/0] shutdown
[RouterB-Pos2/2/0] undo shutdown

Verifying the configuration

# Verify the POS interface settings, for example, on Router A.
<RouterA> display interface pos
# Verify that Router A and Router B can ping each other at the POS interfaces. (Details not shown.)

Troubleshooting POS interfaces

Symptom 1

The physical state of the POS interface is down.

Solution

To resolve the problem:
Verify that the POS interface is connected correctly to the remote port.
•
The transmit connector at one end must be connected to the receive connector at the other end.
The transmit and receive connectors of the POS interface are not connected by the same fiber.
If they are connected by the same fiber, the display interface command displays the "loopback
detected" message, whether or not the loopback detection feature is enabled.
If the two POS interfaces are directly connected, verify that the two ends use different clock mode
•
settings.
If the problem persists, contact HP Support.
•

Symptom 2

The physical layer is up, but the data link layer is down.
Solution
To resolve the problem:
• Verify that the two ends have matching clock mode, scrambling setting, and physical parameters.
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