User Manual - Configuration Guide (Volume 3)
Versatile Routing Platform Chapter 1
DDR Configuration
1-19
Table DC-1-32 Use Legacy DDR to configure ISDN dedicated line
Operation Command
Configure dial string, according to which DDR
determines datagram (used in the configuration
mode of the dial interface)
dialer-list dialer-group protocol protocol-name {permit |
deny | list access-list-number}
Enter the configuration mode of the designated ISDN
interface (used in global configuration mode) interface interface-type interface-number
Set the ISDN interface to belong to a dialer group
(used in the configuration mode of ISDN interface) dialer-group number
Set B channel used to connect dedicated lines (used
in the configuration mode of ISDN interface) dialer isdn-leased channel-num ber
Configure dialer map (used in the configuration mode
of the dial interface) dialer map protocol next-hop-address dial-string
II. Configure autodial
Autodial means that when the router has been started, DDR will automatically try to
establish dial connection with the remote end, making it unnecessary to trigger
datagram. If dial connection fails, DDR will automatically try to establish dial connection
at regular intervals. Once the dial connection is established, it won’t disconnect itself
due to timeout (i.e. dialer idle-timeout is not functional).
Table DC-1-33 Configure autodial
Operation Command
Enter the configuration mode of the designated dial
interface (used in global configuration mode) interface i nterface-type interface-number
Configure dialer map for autodial (used in the
configuration mode of the dial interface) dialer map protocol next-hop-address name hostname
dialerstring [: isdnsubaddress] autodial
Set autodial interval (used in the configuration mode
of the dial interface) dialer au todial-interval seconds
Autodial interval is 300 seconds by default.
III. Configure cyclic use of dialer map
In dialer map configuration, the same destination network layer addr ess can be
configured with multiple dialer maps, using different dial strings, thus fo rming dial string
backup between them. When DDR is establishing dial connection with the remote end,
if the dial string currently used can’t connect the remote end, then, in the next call, the
next dialer map and the dial string configured by it will be selected automatic ally. The
configurations are as follows: