Thanks. I knew there was a way to set the dialer priority but I just wasn't sure how it operated. I have yet to find a reference on CCO that specifies what the priority really accomplishes. If a dialer with a high priority needs to use a line but the line is being used by a dialer with a lower priority, does it simply disconnect the existing call and take over?
Or, does it make use of the fast idle timer to be a little more fair? I'm still looking on CCO at the moment. Hopefully, I'll find a link that makes this more clear. Thanks again, John >>> Tshon 2/22/02 3:07:43 PM >>> Yes this is possible exactly as you discribed. Hope fully in this scenario you have more than one bri. But, say you don't you have two B channels unless the load exceeds one of the B channels you have no problem.... I believe the last question is "is there a priority or preempt command?" Make a dialer interface and see : - ) John Neiberger wrote: >I was just talking to a guy I work with about this and I thought it was >an interesting scenario. It was his idea and my first thought was that >it wasn't possible, but then after a little more pondering I decided >that it might be possible. Note: 'possible' does not mean desirable. >:-) Here's the scoop: > > > >[A]-----------------[B] > | \ > | \ > | \ > | \ > | \ > | \ > | \ >[C] ----------- [D] > >Site A is connected to B, a disaster recovery facility, via frame >relay. A also has point-to-point connections to sites C and D. C and >D are connected via frame relay but obviously only use the frame relay >link to reach A if their own primary link goes down. > >C and D have ISDN connections configured to dial B in case both links >to A go away (Dialer Watch). Now for the twist.... What if you wanted >to configure C to dial D when the load on its primary link reached a >certain point, yet still dial B if both point-to-point links went down? > >I haven't completely figured out how to do this yet, but here's a >start. You might configure two Dialer profiles, one for each >destination. On the major interface on C you'd configure Dialer0 as >your backup interface and configure an appropriate load. When the line >utilization reaches that load, the router would dial Site D. > >Then you might configure Dialer Watch on Dialer1 and make it dialer >Site B if routes originating from Site A disappear. The difficulty is >that the Dialer interface that calls Site B would have to have absolute >priority. If the primary link goes down, because Dialer0 is configured >as a backup it might grab the BRI first. Even if it does get there >first, when Dialer Watch kicks in, we'd have to have a way to clear the >line immediately so Dialer1 could dial out. > >Is that possible? Admittedly, I'm a bit weak on DDR of this variety, >but this sounded like an interesting brain teaser. > >Regards, >John Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36281&t=36281 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
