Networking requirements – Nortel Networks 8000 User Manual

Page 348

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8 Frame relay configuration

Nortel Secure Router 8000 Series

Configuration -WAN Access

return

Configuration file of Router C

#

sysname RouterC

#

fr switching

#

interface Serial1/0/0

link-protocol fr

fr interface-type nni

fr dlci 300

#

interface Serial2/0/0

link-protocol fr

fr interface-type dce

fr dlci 200

#

fr switch pvc2 interface Serial1/0/0 dlci 300 interface Serial2/0/0 dlci 200

#

return

Configuration file of Router D

#

sysname RouterD

#

interface Serial2/0/0

link-protocol fr

ip address 196.1.1.2 255.255.255.0

#

return

8.14.5 Example for configuring the PVC backup of frame relay

switching

Networking requirements

As shown in Figure 8-8, in the general packet radio service (GPRS) application, you set up a

FR link between a base station controller (BSC) and a serving GPRS support node (SGSN).

Router A serves as a FR switch.

You transparently back up SGSN 1 to SGSN 2. When errors occur on SGSN 1, the BSC can

automatically communicate with SGSN 2 without determining that SGSN 1 is out of service.

Configure switching PVC back up on Router A to implement the above requirements.

8-58

Nortel Networks Inc.

Issue 5.3 (30 March 2009)

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