David, Stefan: I configured "hold-time 20" and BGP session came up with an "Active Holdtime: 20" as expected. Thank you for explanations!
regards, martin 2011/8/9 Stefan Fouant <[email protected]>: > On 8/9/2011 7:55 AM, Martin T wrote: >> >> Hi, >> in case one has following settings active with it's BGP peer: >> >> Holdtime: 90 Preference: 170 >> Active Holdtime: 90 >> Keepalive Interval: 30 >> >> ..then what do they mean? As I understand, "Holdtime" is the maximum >> number of seconds allowed to elapse between the time that a BGP system >> receives successive keepalive or update messages from a peer. So if >> the holdtime is configured to 90s, the "Holdtime" value under "show >> bgp neighbor I.I.P.P" doesn't change, does it? How is "Active >> Holdtime" different from "Holdtime"? And what does this "Preference" >> mean? > > Holdtime is the configured holdtime on the local device, whereas Active > Holdtime is the negotiated holdtime between the two peers, which should be > the minimum of the two peers holdtime configuration. > > Preference is the value we assign to BGP routes learned from this neighbor, > which in this case is 170, the default. Preference is the equivalent of > Administrative Distance in Cisco, and allows the router to determine which > route to prefer should the identical route be learned from multiple sources > (ex: RIP[100] vs. BGP[170]). > >> Last but not least- in case of the configuration above, is it possible >> that the connection between peers is down for example 80 seconds and >> then comes back up, but as holdtime is set to 90s, the session stays >> up? > > Yes. > > Stefan Fouant > JNCIE-ER, JNCIE-M, JNCIE-SEC, JNCI > Technical Trainer, Juniper Networks > http://www.shortestpathfirst.net > http://www.twitter.com/sfouant > _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
