Manual

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
Nortel Secure Router 8000 Series
____________________________________________________________________________ Configuration -WAN Access
iv
Nortel Networks Inc.
Issue 5.3 (30 March 2009)