User manual

Nortel Secure Router 8000 Series
Configuration -WAN Access
iv
Nortel Networks Inc.
Issue 5.3 (30 March 2009)
4.2.7 Configuring check word length of CRC..........................................................................................4-12
4.2.8 Configuring MTU ...........................................................................................................................4-13
4.2.9 Checking the configuration .............................................................................................................4-14
4.3 Configuring STM-1 CPOS interfaces........................................................................................................4-15
4.3.1 Establishing the configuration task .................................................................................................4-15
4.3.2 Configuring clock mode..................................................................................................................4-15
4.3.3 Configuring frame format ...............................................................................................................4-16
4.3.4 Configuring overhead bytes ............................................................................................................4-17
4.3.5 Configuring AUG multiplexing route .............................................................................................4-17
4.3.6 Checking the configuration .............................................................................................................4-18
4.4 Configuring E1/T1 channels of the CPOS interface..................................................................................4-18
4.4.1 Establishing the configuration task .................................................................................................4-18
4.4.2 Creating E1/T1 channels.................................................................................................................4-19
4.4.3 Configuring frame format ...............................................................................................................4-20
4.4.4 Configuring clock mode..................................................................................................................4-21
4.4.5 Disabling or enabling the E1/T1 channel........................................................................................4-21
4.4.6 Checking the configuration .............................................................................................................4-22
4.5 Configuring synchronous serial interfaces ................................................................................................4-23
4.5.1 Establishing the configuration task .................................................................................................4-23
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
5 Logical interface configuration ...............................................................................................5-1
5.1 Introduction .................................................................................................................................................5-2
5.1.1 Sub-interface overview......................................................................................................................5-2
5.1.2 Virtual template and virtual access interface.....................................................................................5-3
5.1.3 Virtual ethernet interface...................................................................................................................5-3
5.1.4 Loopback interface............................................................................................................................5-4
5.1.5 Null interface.....................................................................................................................................5-4
5.2 Creating sub-interfaces................................................................................................................................5-4