>Hi, >In a training senario , >"ensure that BGP traffic is only seen every 10 >minutes" >It's about the BGP keepalive , right ? >timers bgp keepalive holdtime > >If Frame-Relay is down , ISDN will back up FR , at >this time , should BGP be more quiet ? > >Thanks ! > >Ben
The writer of this scenario doesn't understand BGP. Yes, you could change the keepalive to 10 minutes or so. Indeed, many ISPs turn off BGP keepalive and rely on TCP or the physical layer. All that would affect, however, is BGP keepalives, not any other messages. What the author doesn't seem to understand is that if your BGP peer has something significant to send you, such as a route announcement or withdraw, it is obliged to send that once it knows the information, subject to some specialized constraints such as MinRouteAdvertisement, which you may not even be able to change without code access. As far as whether FR going down and ISDN coming up should affect BGP, it would depend how you have the BGP peering configured. If both media lead to the loopback interface and TCP doesn't see a connectivity failure, then BGP shouldn't care. If, however, the peers are associated with specific interfaces and the interface goes down, basic BGP logic is that you MUST announce withdrawals of all routes affected by that interface. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28906&t=28906 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
