5 logical interface configuration -1 – Nortel Networks 8000 User Manual

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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)

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