Network Router User Manual

Nortel Secure Router 8000 Series
Configuration -WAN Access
ii Nortel Networks Inc. Issue 5.3 (
30 March 2009)
4.5.2 Configuring attribute parameters of synchronous serial interface......................................................4-24
4.5.3 Configuring link layer protocol of synchronous serial interface........................................................4-24
4.5.4 Configuring hold-interval of the link layer protocol for synchronous serial interface.......................4-25
4.5.5 Checking the configuration................................................................................................................4-25
4.6 Maintaining POS and CPOS interface ........................................................................................................4-26
4.6.1 Resetting interface statistics...............................................................................................................4-26
4.6.2 Setting loopback to detect whether the interface is normal................................................................4-26
4.7 Configuration examples ..............................................................................................................................4-27
4.7.1 Example for directly connecting routers through POS interfaces......................................................4-27
4.7.2 Example for configuring STM-1 CPOS interfaces ............................................................................4-29
4.8 Troubleshooting...........................................................................................................................................4-34
4.8.1 Physical status of POS interfaces is Down.........................................................................................4-34
4.8.2 Line protocol status of POS interfaces is Down ................................................................................4-35
4.8.3 Severe packet loss on a POS interface ...............................................................................................4-35