
Customizing Backup Circuits
117353-B Rev. 00
11-3
2.
Create a dial object to be used by dial backup service.
For example, to make the interface on slot 2 connector 1 a backup interface,
navigate to the box prompt and enter:
box# serial/2/1
serial/2/1# dial
By entering dial, PPP automatically becomes the default datalink protocol.
3.
Create a backup pool.
For example:
box# backup-pool 10
4.
Add a backup line to the pool then return to the frame relay service
leased interface prompt.
For example:
backup-pool/10# backup-line serial/2/1
backup-line/2/1# cwc; serial 5/1; frame-relay; service/to-Boston
5.
Create a backup circuit.
backup-circuit pool-id
<ID_number>
backup-mode
<mode>
ID_number is the number of a line pool.
mode can be:
initiator
- instructs the router to initiate dialing. The router at the other end
must be set to receiver so that it waits until the initiator router makes the call.
Only one router on the link can serve as the initiator. If both are set to initiator,
they may try to initiate a call simultaneously, resulting in a collision on the
network.
receiver
- instructs the router to wait to receive the call from the initiator.
If
you configure the router to be the receiver, you need to make a caller
resolution entry for the circuit. By requiring an entry, Site Manager ensures
that you identify the remote initiator router.The local router can then verify
the initiator’s identity and accept the incoming calls.
For example, to provide dial backup service for a frame relay primary circuit
on slot 5 connector 1, using line pool 10, enter:
service/to-Boston# backup-circuit pool-id 10 backup-mode initiator
By adding a backup circuit for this interface, this makes the frame relay leased
interface a primary interface and enables dial backup service.
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