i have one router 1720 with 1 serial one isdn bri.
i want to configure Frame Relay on serial interface and leve the isdn bri deactivated can you give me one configuration for that?
DSU/TSU modem for clocking the frame relay
DLCI Number for Frame Relay
Service Providers Telephone number
Next Hop router and mask where applicable
router#conf t
router#(config)interface serial 0
router#(config-if)encapsulation frame relay (ietf|cisco)
router#(config-if)no shutdown
router#(config-if)exit
router#(config)interface serial 0/0.1 point-to-point
router#(config-if)ip address x.x.x.x x.x.x.x
router#(config)no shutdown
router#(config)exit
you may also have to set the following:
router(config)#interface serial 0/0.1
frame-relay map ip x.x.x.x dlci# broadcast
(this maps the ip address to the appropriate dlci in case the inverse arp is not supported by the switch or your router)
frame-relay lmi-type (ansi|cisco|q333)
(this statically defines the lmi connection management protocol type for communication on the line between the router and the switch)
There is also a bandwidth command that you can set but i cant remember it off the top of my head.
You may also have to define static maps through ip route commands to reach the next hop destinations
As for leaving the bri interface deacitivated unless something is connected to it and passing unneccessary traffic you can leave it alone. I hope this is a little bit of help. Check my commands at
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