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274 CHAPTER 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-in command 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
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
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
end
dialer number dial-string [
:isdn_subaddress ]
Pre-process ISDN dial-in numbers dialer call-in remote-number [
callback ]
Operation Command
Display receiving/sending statistics information
of Frame Relay LMI type packets
display fr lmi-info [ interface
type number ]
Display protocol address and Frame Relay
address mapping table
display fr map-info