Enterasys Networks X-PeditionTM Configuring BAP, Dual XSRs One Router Using DoD with Call Request

Configuring BAP

XSR(config-if<D255>)#multilink min-links 37

XSR(config-if<D255>)#ppp multilink bap

XSR(config-if<D255>)#ppp bap number default 1200

XSR(config-if<D255>)#ppp bap number default 1400

XSR(config-if<D255>)#ppp bap call request

XSR(config-if<D255>)#ppp multilink fragment-delay 80

XSR(config-if<D255>)#ppp multilink multi-class

XSR(config-if<D255>)#dialer called 1200

XSR(config-if<D255>)#dialer called 1400

XSR(config-if<D255>)#dialer idle-timeout 1000000

XSR(config-if<D255>)#dialer watch-group 2

XSR(config-if<D255>)#ip address 200.3.8.21 255.255.255.0

XSR(config-if<D255>)#ip firewall ip-multicast in

XSR(config-if<D255>)#ip firewall ip-multicast out

XSR(config-if<D255>)#ppp keepalive 0

XSR(config-if<D255>)#no shutdown

Configuring BAP

The XSR is designed to provide Dial on Demand (DoD) functionality in addition to BAP, which is essentially an enhancement of Bandwidth on Demand (BoD). The router performs DoD when a dialer map and dialer group values are configured as well as multilink PPP.

One function central to DoD is the XSR’s ability to perform LAN route spoofing, a means of maintaining routes in the routing table while keeping unused lines physically down.

The router brings up a line only when it receives a data packet and tears it down when idle timeout values are reached. Spoofing on the XSR is applicable to the dial out router only. Additional configuration includes specifying call/callback request (for BAP configurations) and load threshold (BoD) values.

On the XSR, DoD automatically brings up the first link if the router is the caller, and BAP negotiates raising the remaining links as they are needed.

The following tasks are required to configure BAP:

•Set up PRI/BRI physical interfaces

•Configure BAP values such as the load threshold and phone numbers

The following examples configure BAP, DoD, Call Request and Callback Request features on connected XSRs.

Dual XSRs: One Router Using DoD with Call Request

The following example sets up BAP on connecting XSRs over PRI and BRI interfaces with each capable of calling the other. The configurations are complimentary except only one XSR will add or remove links.

XSR1 Configuration

1.Begin configuring XSR1 by setting up the T1 controller (PRI interface):

XSR1(config)#controller t1 1/0 XSR1(config-controller<T1-1/0>)#pri-group

8-14 Configuring PPP