how to backup load

[noori1502]

i have 4 isdn line to backup 1 mbps leased line.

Hi All,

Still can't solve my problem.

My Question:

If the leased line down, the 1st isdn line will back up. Let say the 1st isdn backup line cannot support the load, how can i configure the 2nd line to backup load of the 1st isdn line? Same goes to 3rd and 4th isdn line, i want them to back up load if the backup line cannot support the load.

I don't want all the backup line to up at the same time. It should up when back up load needed.

Please Help. Thanks

[tepatel]

You need to group all the 4 bri lines in to one dialer rotary group along with ppp multilink and use "dialer load-threshold xx" command so that additional bri channels will be added once load increases beyond specified load in that command.

Here is the link which discuss that config

http://www.cisco.com/en/US/tech/tk713/tk507/technologies_configuration_example09186a00801035c1.shtml

For more on "dialer load-threshold xx", pl. visit

http://www.cisco.com/en/US/tech/tk801/tk379/technologies_tech_note09186a0080093c4a.shtml

[noori1502]

thanks!