Using of virtual-access interface as backup

[admin_2]

I want to use ISDN for backing up my

serial-line in case of heavy load

(backup-load) or backup the serial line if it fails. If Backup-interface is open traffic should be load-balanced

between Serial-line (2Mb) and dialer interface (consisting of some B-channels, up to 30) depending on how many channels of backup interface are open.

Unfortunately the bandwidth(or any other metric) are not changing depending on the count of open channels,

so I used a virtual-template to create a

virtual-access-interface which changes the bandwidth metric depending on the open B-channels.

All works fine, until the serial-line comes back (or falls under the configured backup-load) Now the virtual-access interface should be kicked off, but only the dialer-inertface or the virtual-template interface(does not matter which of the two we configured as backup-interface) is kicked off and the virtual access interface is unfortunately remain up and running.

Any trick known to prevent this behaviour

[#2]

To do this, you need the fix for

CSCdm79383, 12.1 and later. Your config

should look like this:

interface Serial1

no ip address

encapsulation ppp

load-interval 30

dialer in-band

dialer pool-member 10

dialer leased <-----New Command

ppp authentication chap

ppp multilink

!

interface Serial0:23

no ip address

encapsulation ppp

dialer pool-member 10 max-link 2

ppp multilink

!

interface Dialer10

ip unnumbered Loopback0

encapsulation ppp

dialer remote-name HQ

dialer pool 10

dialer disable-multiencaps <---New Command

dialer string 202

dialer load-threshold 5 outbound

dialer-group 1

ppp multilink

ppp timeout multilink link remov