3Com 10014299 Display and debug Frame Relay, Configure parameters related to dialer profiles

274CHAPTER 17: CONFIGURING FRAME RELAY

In the legacy BDR implementation of Frame Relay over ISDN, a dialer interface and all the ISDN physical interfaces (including BRI and PRI interfaces) attached to it will be Configured with Frame Relay.

■Adopt dialer profiles

In the dialer profiles implementation of Frame Relay over ISDN, the dialer number command must be configured, besides using the link-protocol fr command to change the link layer protocol on the interface. The configuration is necessary because the negotiation of user name is disabled after the dialer interface is configured with Frame Relay, so the called party will identify different dialer interfaces according to the dial strings of the calling parties. In this case, however, there is no need to configure the dialer user command. In addition, the dialer call-incommand must be configured for the called party to pre-process a dial-in number, thereby to determine whether the user dialing the number should be accessed. For other configurations, refer to the Dial-up.

Perform the following configuration in physical ISDN or dialer interface view.

Table 316 Configure parameters related to dialer profiles

Operation	Command
Configure a dialer interface with Frame Relay	link-protocol fr [ ietf
	nonstandard ]
Enable dialer profiles	dialer bundle number
Configure the dial string for calling a remote	dialer number dial-string[
end	:isdn_subaddress ]
Pre-process ISDN dial-in numbers	dialer call-in remote-number[
	callback ]

The two ends of a BDR call should work with the same link layer protocol.

For a dialer interface adopting dialer profiles to implement Frame Relay over ISDN, it should be configured with Frame Relay. In addition, Frame Relay and PPP are probably carried on a B channel for supporting the dynamic configuration on the channel. Therefore, the ISDN physical interface should be configured with PPP. After the dynamic B channel is disconnected, the link layer protocol of the ISDN interface will be automatically restored to PPP (by default, physical interface will inherit the configurations of dialer interface).

Multiple dialer number is allowed to configure for the calling party, which is the so-called dialer string rotary backup. For the called party, after a dialer interface link layer protocol is configured to Frame Relay, the dialer numbers configured on other dialer interfaces cannot be the same dialer number configured on it. Otherwise, calls will fail.

Display and debug Frame Relay

Please use the display and debugging commands in all views.

Table 317 Display and Debug Frame Relay

Operation	Command
Display receiving/sending statistics information	display fr lmi-info [ interface
of Frame Relay LMI type packets	type number ]
Display protocol address and Frame Relay	display fr map-info
address mapping table