Nortel Networks 8000 - Manual (Page 348)

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)