ISDN problem 1

[jonks]

I have a Cisco 8100 router configured for dial on demand internet/e-mail access.Dialling up over ISDN BRI.The problem that I am having is the horrendous bills BT are sending me because the line is constantly brought up by uninteresting broadcast traffic. How can i stop the ISDN dialing up unnecessary

Thanks in advance

 

[COPA]

I had a similar problem with SOHO 803's dialling a Central 3640.
I Presume you have stripped the unnecessary traffic away (ie just using what you need ) with deny access lists?
How many PCs use the dial on Demand ?
Is it possible that WINS could be using this link , that would certainly cause an overhead if it is !
I also had limited success removing "IP cLassless" , it screwed up some connections to Intranet Servers.
See if that helps , but a config might be useful to look at !
Paul C.
s-)

 

[mavenccie]

I don't know what type of cmd structure uses on an 8100 (heck, I never heard of that series,anyways), but if you were using IOS code you need the following:

int bri0
ip address ...
dialer-group 1
!
dialer-list 1 protocol list 101
!
access-list 101 permit ip ....Interesting Traffic
access-list 101 permit tcp ....Whatever is essential and you want to cross the ISDN line
And you shouldn't be running a routing protocol that doesn't have a way of controlling its updates over an ISDN. You should either static route or snapshot routing or OSPF Demand Circuit.
If your router uses some different CLI then you can translate this into something that will help you.