You must specify global and interface
parameters to prepare the router for operation in an ISDN environment.
Global parameter tasks include the
following:
- Select the switch that matches the
ISDN provider's switch at the CO. This requirement is necessary
because, despite standards, signaling specifics differ regionally
and nationally.
- Set destination details. This
involves indicating static routes from the router to other ISDN
destinations and establishing the criteria for interesting packets
in the router that initiate an ISDN call to the appropriate
destination.
Interface parameter tasks include the
following:
- Select interface specifications.
Specify the interface type BRI and the number for this ISDN BRI
port. The interface uses an IP address and subnet mask.
- Configure ISDN addressing with DDR
dialer information and any ID supplied by the ISDN service
provider. Indicate that the interface is part of the dialer group,
using the interesting packets set globally. Additional commands
place the ISDN call to the appropriate destination.
- Following interface configuration,
you can define optional features, including time to wait for the
ISDN carrier to respond to the call and seconds of idle time
before the router times out and drops the call.
- Next, BRI configuration involves
configuration of ISDN, switch type, and ISDN SPIDs. The following
section provides examples and descriptions of ISDN configuration
tasks.
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