RE: how can i use all 3 of these routes for load sharring?

Indeed I remember Narbik wrote about it recently
I n your case I doubt it will work : the command removes the need to have same AS Path but I think all other attributes need to be the same

Your routes show different origin code & Med.

> Message du 25/07/12 C 18h26
> De : "Aaron"
> A : "'Aaron'" , "'Gilles Fabre'" , "'Ccielab_at_groupstudy.com'"
> Copie C :
> Objet : RE: how can i use all 3 of these routes for load sharring?
>
> cool, look what i just found !
> http://blog.alwaysthenetwork.com/tutorials/bgp-multipath-relax/
>
> looks like this is a way to relax the multipath requirements.
>
> y'all think this will work?
>
> XR...
>
> RP/0/RSP0/CPU0:9k#conf
> Wed Jul 25 11:19:34.965 CDT
>
> RP/0/RSP0/CPU0:9k(config)#router bgp 64512
>
> RP/0/RSP0/CPU0:9k(config-bgp)#vrf one
>
> RP/0/RSP0/CPU0:9k(config-bgp-vrf)#bgp bestpath ?
> aigp AIGP attribute
> as-path AS path length
> compare-routerid Compare router-id for identical EBGP paths
> cost-community Cost community
> med MED related
>
> RP/0/RSP0/CPU0:9k(config-bgp-vrf)#bgp bestpath as-path ?
> ignore Ignore as-path length
> multipath-relax Relax as-path check for multipath selection
>
> RP/0/RSP0/CPU0:9k(config-bgp-vrf)#bgp bestpath as-path multipath-relax ?
>
>
> -------------------------------------------------------------------------
>
> IOS....hidden...
>
> ospf1(config)#router bgp 64512
> ospf1(config-router)#bgp m
> ospf1(config-router)#bgp maxas-limit ?
> <1-2000> Number of ASes in the AS-PATH attribute
>
> ospf1(config-router)#bgp best
> ospf1(config-router)#bgp bestpath ?
> compare-routerid Compare router-id for identical EBGP paths
> cost-community cost community
> med MED attribute
>
> ospf1(config-router)#bgp bestpath as
> ospf1(config-router)#bgp bestpath ?
> compare-routerid Compare router-id for identical EBGP paths
> cost-community cost community
> med MED attribute
>
> ospf1(config-router)#bgp bestpath ?
> compare-routerid Compare router-id for identical EBGP paths
> cost-community cost community
> med MED attribute
>
> ospf1(config-router)#bgp bestpath as-path ?
> % Unrecognized command
> ospf1(config-router)#bgp bestpath as-path
> % Incomplete command.
>
> ospf1(config-router)#bgp bestpath as-path multipath-relax
> ospf1(config-router)#do sh run | sec router bgp
> router bgp 64512
> no synchronization
> bgp log-neighbor-changes
> bgp bestpath as-path multipath-relax
> no auto-summary
> ospf1(config-router)#
>
>
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Aaron
> Sent: Wednesday, July 25, 2012 11:02 AM
> To: 'Gilles Fabre'; 'Ccielab_at_groupstudy.com'
> Subject: RE: how can i use all 3 of these routes for load sharring?
>
> Thanks Gilles, Do all 5 of these need to be equal ? bb( can the first in
> the list (weight) be equal to suffice ?
>
>
>
> Aaron
>
>
>
> From: Gilles Fabre [mailto:fabre.gilles_at_voila.fr]
> Sent: Wednesday, July 25, 2012 10:51 AM
> To: Aaron; Ccielab_at_groupstudy.com
> Subject: re: how can i use all 3 of these routes for load sharring?
>
>
>
> In order to be candidates for multipath, paths to the same destination need
> to
> have these characteristics equal to the best-path characteristics:
>
> B7 Weight
>
> B7 Local preference
>
> B7 AS-PATH length
>
> B7 Origin
>
> B7 MED
>
>
> Your route #3 comes from AS123 while #1 & #2 are local
> Consequently, 3 can't be considered for multipath
>
> Best regards.
>
>
>
>
> > Message du 25/07/12 C 17h38
> > De : "Aaron"
> > A : "Ccielab_at_groupstudy.com"
> > Copie C :
> > Objet : how can i use all 3 of these routes for load sharring?
> >
> > Any idea why I see 3 default routes in bgp but only 2 get put into rib?
> How
> > would I get all 3 of these into rib?
> >
> >
> >
> > RP/0/RSP0/CPU0:9k#sh bgp vrf one 0.0.0.0
> >
> > Wed Jul 25 10:26:33.834 CDT
> >
> > BGP routing table entry for 0.0.0.0/0, Route Distinguisher: 10.101.0.10:1
> >
> > Versions:
> >
> > Process bRIB/RIB SendTblVer
> >
> > Speaker 1073639 1073639
> >
> > Last Modified: Jul 20 19:40:28.857 for 4d14h
> >
> > Paths: (3 available, best #2)
> >
> > Not advertised to any peer
> >
> > Path #1: Received by speaker 0
> >
> > Not advertised to any peer
> >
> > Local
> >
> > 10.101.0.1 (metric 3) from 10.101.0.1 (10.101.0.1)
> >
> > Received Label 16200
> >
> > Origin incomplete, metric 1, localpref 100, valid, internal,
> > multipath, import-candidate, imported
> >
> > Received Path ID 0, Local Path ID 0, version 0
> >
> > Extended community: RT:10.101.0.1:1 OSPF route-type:0:5:0x1 OSPF
> > router-id:1.2.3.17
> >
> > Path #2: Received by speaker 0
> >
> > Not advertised to any peer
> >
> > Local
> >
> > 10.101.0.2 (metric 2) from 10.101.0.2 (10.101.0.2)
> >
> > Received Label 16220
> >
> > Origin incomplete, metric 1, localpref 100, valid, internal, best,
> > group-best, multipath, import-candidate, imported
> >
> > Received Path ID 0, Local Path ID 1, version 1073639
> >
> > Extended community: RT:10.101.0.2:1 OSPF route-type:0:5:0x1 OSPF
> > router-id:1.2.3.21
> >
> > Path #3: Received by speaker 0
> >
> > Not advertised to any peer
> >
> > 123
> >
> > 2.4.6.45 from 2.4.6.45 (1.3.9.173)
> >
> > Origin IGP, localpref 100, valid, external, group-best
> >
> > Received Path ID 0, Local Path ID 0, version 0
> >
> > Extended community: RT:10.101.0.10:1
> >
> >
> >
> > RP/0/RSP0/CPU0:9k#sh rou vrf one 0.0.0.0
> >
> > Wed Jul 25 10:26:38.117 CDT
> >
> >
> >
> > Routing entry for 0.0.0.0/0
> >
> > Known via "bgp 64512", distance 200, metric 1, candidate default path,
> > type internal
> >
> > Installed Jul 20 19:40:28.985 for 4d14h
> >
> > Routing Descriptor Blocks
> >
> > 10.101.0.1, from 10.101.0.1, BGP multi path
> >
> > Nexthop in Vrf: "default", Table: "default", IPv4 Unicast, Table Id:
> > 0xe0000000
> >
> > Route metric is 1
> >
> > 10.101.0.2, from 10.101.0.2, BGP multi path
> >
> > Nexthop in Vrf: "default", Table: "default", IPv4 Unicast, Table Id:
> > 0xe0000000
> >
> > Route metric is 1
> >
> > No advertising protos.
> >
> >
> >
> >
> >
> > Aaron
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
>
> _____
>
> Les plus beaux looks de Kate Middleton sont C dC)couvrir sur Voila.fr
> b
> eaux-looks-depuis-son-mariage/>
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>
Received on Wed Jul 25 2012 - 22:08:24 ART