Troubleshooting Pos Interfaces - HP HSR6800 Configuration Manual

# Create sub-interface 1 on the interface.
[RouterA] interface pos 2/1/0.1
[RouterA-Pos2/1/0.1] ip address 10.10.10.1 255.255.255.0
[RouterA-Pos2/1/0.1] fr map ip 10.10.10.2 50
[RouterA-Pos2/1/0.1] mtu 1500
[RouterA-Pos2/1/0.1] quit
# Create sub-interface 2 on the interface.
[RouterA] interface pos 2/1/0.2
[RouterA-Pos2/1/0.2] ip address 20.10.10.1 255.255.255.0
[RouterA-Pos2/1/0.2] fr map ip 20.10.10.2 60
[RouterA-Pos2/1/0.2] mtu 1500
[RouterA-Pos2/1/0.2] quit
2. Configure Router B:
# Configure interface POS 2/1/0.
[RouterB] interface pos 2/1/0
[RouterB-Pos2/1/0] clock slave
# Configure frame relay encapsulation on the interface.
[RouterB-Pos2/1/0] link-protocol fr
[RouterB-Pos2/1/0] fr interface-type dte
[RouterB-Pos2/1/0] ip address 10.10.10.2 255.255.255.0
[RouterB-Pos2/1/0] fr dlci 70
[RouterB-Pos2/1/0] fr map ip 10.10.10.1 70
[RouterB-Pos2/1/0] mtu 1500
3. Configure Router C in the same way Router B is configured.
Verifying the configuration
Check interface connectivity with the display interface pos command and test network connectivity with
the ping command.

Troubleshooting POS interfaces

Symptom 1
The physical state of POS interface is down.
Solution
Check that the transmitting and receiving fibers-optic are correctly connected to the POS interface.
•
If you connect the two ends of a fiber-optic to the transmitting end and the receiving end of the same
POS interface, when you execute the display interface command, a "loopback detected" message
is displayed on the screen even if loopback is not enabled.
If the two routers are directly connected back to back, check that the internal clock is enabled on
•
either of the two POS interfaces.
Symptom 2
The physical layer is up but the link is down.
Solution
Check the following items:
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