Just as I thought... Nice way of showing it too :) I can see why both work though...
Cheers, Matt CCIE #22386 CCSI #31207 On 8 March 2010 16:46, venkat <[email protected]> wrote: > Hi Matt, > I just did a small test and it seems your deny statement should work as > well. > BGP dampening(with route-map option) applies to only prefix; matched by a > route-map sequence which has both permit and "set dampening" command > applied. > R2#show route-map > route-map test, permit, sequence 5 > Match clauses: > ip address (access-lists): 2 > Set clauses: > dampening 2 2 2 2 > Policy routing matches: 0 packets, 0 bytes > route-map test, deny, sequence 10 > Match clauses: > ip address (access-lists): 3 > Set clauses: > dampening 10 10 10 10 > Policy routing matches: 0 packets, 0 bytes > route-map test, permit, sequence 15 > Match clauses: > ip address (access-lists): 4 > Set clauses: > dampening 4 4 4 4 > Policy routing matches: 0 packets, 0 bytes > route-map test, permit, sequence 20 > Match clauses: > ip address (access-lists): 5 > Set clauses: > Policy routing matches: 0 packets, 0 bytes > R2#show ip bgp dam > R2#show ip bgp dampening parameters > dampening 2 2 2 2 (route-map test 5) > Half-life time : 2 mins Decay Time : 120 secs > Max suppress penalty: 4 Max suppress time: 2 mins > Suppress penalty : 2 Reuse penalty : 2 > dampening 10 10 10 10 (route-map test 10) << "though this is displayed, it > is not in effect due to deny seq." > Half-life time : 10 mins Decay Time : 600 secs > Max suppress penalty: 20 Max suppress time: 10 mins > Suppress penalty : 10 Reuse penalty : 10 > dampening 4 4 4 4 (route-map test 15) > Half-life time : 4 mins Decay Time : 240 secs > Max suppress penalty: 8 Max suppress time: 4 mins > Suppress penalty : 4 Reuse penalty : 4 > R2# > > So, only for prefix matching seq 5 and 15, dampening feature is applied. > Could someone confirm the above behavior which i noticed in gns? > Thanks, > Venkat > On Mon, Mar 8, 2010 at 9:59 AM, Matt Hill <[email protected]> wrote: >> >> HI Venkat, >> >> This was the route-map which was used for dampening. I did not use >> any route-map to suppress or filter any prefixes. >> >> router bgp x >> bgp dampening route-map xxx >> >> Cheers, >> Matt >> >> CCIE #22386 >> CCSI #31207 >> >> On 8 March 2010 15:12, venkat <[email protected]> wrote: >> > Hi Matt, >> > >> > Doesn't the deny statement in route-map denies those prefixes from >> > advertisement to neighbor. I haven't tested this, but I believe those >> > deny statement will not allow those matched prefix to get advertised. >> > >> > On 3/8/10, Matt Hill <[email protected]> wrote: >> >> Gday... >> >> >> >> This section asks us to make a route-map and assign various dampening >> >> parameters based on different prefix lengths. ie >/24 do x, /22-23 do >> >> y and <21 do z. >> >> >> >> It also stipulates that certain prefixes must not be dampened at all. >> >> >> >> In the route-map, the "do not dampen ranges" have this in the Proctor >> >> Guide: >> >> >> >> route-map DAMP permit 10 >> >> match ip address prefix-list xxx >> >> route-map DAMP permit 20 >> >> match ip address prefix-list yyy >> >> set dampening ... etc >> >> >> >> now... for my answer, I entered: >> >> >> >> route-map DAMP deny 10 >> >> match ip address prefix-list xxx >> >> route-map DAMP permit 20 >> >> match ip address prefix-list yyy >> >> set dampening etc... >> >> >> >> Now... is there any reason why my deny wont work? I mean I am telling >> >> the router to dampen according to a route-map. If I deny in my >> >> route-map, wont it simply _not_ apply dampening to those prefixes? >> >> >> >> Cheers, >> >> Matt >> >> >> >> CCIE #22386 >> >> CCSI #31207 >> >> _______________________________________________ >> >> For more information regarding industry leading CCIE Lab training, >> >> please >> >> visit www.ipexpert.com >> >> >> > >> > -- >> > Sent from my mobile device >> > > > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
