Cisco Systems 1604 manual Configuring Dial-on-Demand Routing, 3-12, Tips

Chapter 3 Configuring the Cisco 1604 Router

Step 5—Configuring Dial-on-Demand Routing

Step 3	Enter the show ip interface brief command to check the current state of the interface:
	robo-austin# show ip interface brief
	Interface	IP-Address	OK? Method	Status	Protocol
	BRI0	10.1.254.4	YES manual	up	up
	BRI0:1	unassigned	YES unset	down	down
	BRI0:2	unassigned	YES unset	down	down
	Ethernet0	10.1.4.1	YES manual	up	up
	Serial0	unassigned	YES unset	administratively down down

Note Note that the status and protocol for BRI 0 and Ethernet 0 are both up/up, which is what is expected. The term “manual” means that you manually configured the interface since the last reboot. The two B channels (BRI0:1 and BRI0:2) are down because there are no active calls on the BRI interface at this time.

Tips

If you have trouble:

•Make sure the correct ISDN switch type and SPIDs are configured.

•Make sure your BRI line is connected to the correct port.

Step 5—Configuring Dial-on-Demand Routing

Set up the Dial-on-Demand Routing (DDR) routing components on the Cisco 1604. In most cases, a remote site with a single LAN requires a simple DDR configuration, which supports the routing table and call control in a circuit-switched environment.

In this case study, DDR takes the standard dialer map approach. You must configure specific parameters to establish connectivity with the Cisco AS5300 by using sync PPP. Parameters include a static route, username:password, and a dialer map.

To configure DDR, enter the following commands beginning in global configuration mode:

Step 1 Enter the configuration mode for the BRI interface.

robo-austin(config)# interface bri 0

Step 2 Define the interesting packets that activate the ISDN connection. Interesting packets reset the idle timer and trigger dialing. This dialer filter is defined by the dialer-list 2 command. See Step 7.

robo-austin(config-if)# dialer-group 2

Step 3 Disable fair queuing.

robo-austin(config-if)# no fair-queue

Step 4 Disable the Cisco discovery protocol unless you are using it for a specific purpose.

robo-austin(config-if)# no cdp enable

Step 5 Configure the interface to bring up the second B channel when the bandwidth load exceeds 60/255.

robo-austin(config-if)#dialer load-threshold 60 either

Cisco IOS Dial Services Quick Configuration Guide

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