We are concerned with routes on R1, the 0.0.0.0 routes are locally generated. They are connected to R2 and R5.
On Sun, Jul 5, 2009 at 9:13 PM, John Spaulding <[email protected]>wrote: > It looks like your locally originating this route...so the weight is always > going to be higher (32768)....why don't you stop originating the route(take > out the network command) and see what you get with you weight statement on > the 150.100.100.2. You should get the results you're looking for :) > > > > > * 150.100.25.0/24 150.100.25.2 0 0 132 i > > > > * 150.100.100.2 0 100 132 i > > > > *> 0.0.0.0 0 32768 I ------ > show your are originating this route and chosen for best path > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of > [email protected] > Sent: Sunday, July 05, 2009 10:58 PM > To: [email protected] > Subject: CCIE_RS Digest, Vol 42, Issue 34 > > Send CCIE_RS mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://onlinestudylist.com/mailman/listinfo/ccie_rs > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CCIE_RS digest..." > > > Today's Topics: > > 1. Re: EBGP path selection (Bryan Bartik) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 5 Jul 2009 20:58:21 -0600 > From: Bryan Bartik <[email protected]> > Subject: Re: [OSL | CCIE_RS] EBGP path selection > To: Rob <[email protected]> > Cc: [email protected] > Message-ID: > <[email protected]> > Content-Type: text/plain; charset="windows-1252" > > Rob, > > You must be familiar with the path selection process: > > > http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094431.shtml > > On Sun, Jul 5, 2009 at 8:03 PM, Rob <[email protected]> > wrote: > > > All, > > > > > > > > I have never spent a ton of time on BGP in a lab before so before I > started > > work in the workbook I wanted to play with the different pieces in a > simple > > setup. Right now I am only dealing with EBGP using the IPexpert lab > > setup. R2 and R5 are setup in the same fashion as vol 1 section 11 but > > using different BGP AS?s. > > > > > > > > The problem I can not figure out is the path selection between R5 and R2. > > The both peer up and as you will see below default to go over the serial > > interface(150.100.25.0/24) between R2 and R5 for any paths on R1. If I > > shutdown that serial interface it falls back to the Frame-relay link. > What > > I can not figure out is why if prefers the serial link with the network > > 150.100.25.0. I attempted to put a weight on the Frame-relay side as > show > > below, but it still is sending traffic across the 150.100.25.0 network. > Why > > is this? I assume without the weight statement the choice was made by > > lowest ip address. With the weight command I can not figure out at all. > I > > thought weight won on on networks with multiple paths. > > > > > > > > Any help would be great. > > > > > > > > > > > > ----------------------------------------------------- > > > > R5 > > > > > > > > Gateway of last resort is not set > > > > > > > > 200.0.0.0/32 is subnetted, 3 subnets > > > > B 200.0.0.1 [20/0] via 150.100.25.2, 00:03:32 > > > > B 200.0.0.2 [20/0] via 150.100.25.2, 00:03:32 > > > > C 200.0.0.5 is directly connected, Loopback1 > > > > 150.100.0.0/24 is subnetted, 5 subnets > > > > C 150.100.220.0 is directly connected, FastEthernet0/0 > > > > C 150.100.221.0 is directly connected, FastEthernet0/1 > > > > C 150.100.100.0 is directly connected, Serial0/0 > > > > C 150.100.25.0 is directly connected, Serial0/1 > > > > B 150.100.12.0 [20/0] via 150.100.25.2, 00:03:33 > > > > R5-2611XM#sh run | s bgp > > > > router bgp 135 > > > > no synchronization > > > > bgp log-neighbor-changes > > > > network 150.100.25.0 mask 255.255.255.0 > > > > network 150.100.100.0 mask 255.255.255.0 > > > > network 150.100.220.0 mask 255.255.255.0 > > > > network 150.100.221.0 mask 255.255.255.0 > > > > network 200.0.0.5 mask 255.255.255.255 > > > > neighbor 150.100.25.2 remote-as 132 > > > > neighbor 150.100.100.2 remote-as 132 > > > > neighbor 150.100.100.2 weight 33000 > > > > no auto-summary > > > > R5-2611XM#sh ip bgp > > > > BGP table version is 506, local router ID is 200.0.0.5 > > > > Status codes: s suppressed, d damped, h history, * valid, > best, i - > > internal, > > > > r RIB-failure, S Stale > > > > Origin codes: i - IGP, e - EGP, ? - incomplete > > > > > > > > Network Next Hop Metric LocPrf Weight Path > > > > *> 150.100.12.0/24 150.100.25.2 0 0 132 i > > > > * 150.100.100.2 0 0 132 i > > > > * 150.100.25.0/24 150.100.25.2 0 0 132 i > > > > * 150.100.100.2 0 100 132 i > > > > *> 0.0.0.0 0 32768 i > > > > * 150.100.100.0/24 150.100.25.2 0 0 132 i > > > > * 150.100.100.2 0 0 132 i > > > > *> 0.0.0.0 0 32768 i > > > > *> 150.100.220.0/24 0.0.0.0 0 32768 i > > > > *> 150.100.221.0/24 0.0.0.0 0 32768 i > > > > *> 200.0.0.1/32 150.100.25.2 0 132 22222 i > > > > * 150.100.100.2 0 132 22222 i > > > > *> 200.0.0.2/32 150.100.25.2 0 0 132 i > > > > * 150.100.100.2 0 0 132 i > > > > *> 200.0.0.5/32 0.0.0.0 0 32768 i > > > > > > > > > > > > > > > > -------------------------------------------------------------------- > > > > R2 > > > > > > > > R2_R2621#sh run | b 132 > > > > router bgp 132 > > > > no synchronization > > > > bgp log-neighbor-changes > > > > network 150.100.12.0 mask 255.255.255.0 > > > > network 150.100.25.0 mask 255.255.255.0 > > > > network 150.100.100.0 mask 255.255.255.0 > > > > network 200.0.0.2 mask 255.255.255.255 > > > > neighbor 150.100.12.1 remote-as 22222 > > > > neighbor 150.100.25.5 remote-as 135 > > > > neighbor 150.100.100.5 remote-as 135 > > > > no auto-summary > > > > > > > > Gateway of last resort is not set > > > > > > > > 200.0.0.0/32 is subnetted, 3 subnets > > > > B 200.0.0.1 [20/0] via 150.100.12.1, 02:06:56 > > > > C 200.0.0.2 is directly connected, Loopback1 > > > > B 200.0.0.5 [20/0] via 150.100.25.5, 00:10:09 > > > > 150.100.0.0/24 is subnetted, 6 subnets > > > > B 150.100.220.0 [20/0] via 150.100.25.5, 00:10:09 > > > > B 150.100.221.0 [20/0] via 150.100.25.5, 00:10:09 > > > > C 150.100.100.0 is directly connected, Serial1/0.256 > > > > C 150.100.24.0 is directly connected, Serial1/0.24 > > > > C 150.100.25.0 is directly connected, Serial0/0 > > > > C 150.100.12.0 is directly connected, FastEthernet0/0 > > > > R2_R2621#sh ip bgp > > > > BGP table version is 266, local router ID is 200.0.0.2 > > > > Status codes: s suppressed, d damped, h history, * valid, > best, i - > > internal, > > > > r RIB-failure, S Stale > > > > Origin codes: i - IGP, e - EGP, ? - incomplete > > > > > > > > Network Next Hop Metric LocPrf Weight Path > > > > * 150.100.12.0/24 150.100.12.1 0 0 22222 i > > > > *> 0.0.0.0 0 32768 i > > > > * 150.100.25.0/24 150.100.25.5 0 0 135 i > > > > * 150.100.100.5 0 0 135 i > > > > *> 0.0.0.0 0 32768 i > > > > * 150.100.100.0/24 150.100.25.5 0 0 135 i > > > > * 150.100.100.5 0 0 135 i > > > > *> 0.0.0.0 0 32768 i > > > > *> 150.100.220.0/24 150.100.25.5 0 0 135 i > > > > * 150.100.100.5 0 0 135 i > > > > *> 150.100.221.0/24 150.100.25.5 0 0 135 i > > > > * 150.100.100.5 0 0 135 i > > > > *> 200.0.0.1/32 150.100.12.1 0 0 22222 i > > > > *> 200.0.0.2/32 0.0.0.0 0 32768 i > > > > *> 200.0.0.5/32 150.100.25.5 0 0 135 i > > > > * 150.100.100.5 0 0 135 i > > > > > > > > > > > > Checked by AVG - www.avg.com > > Version: 8.5.375 / Virus Database: 270.12.94/2207 - Release Date: > 07/05/09 > > 17:54:00 > > > > > > > -- > Bryan Bartik > CCIE #23707 (R&S), CCNP > Sr. Support Engineer - IPexpert, Inc. > URL: http://www.IPexpert.com > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://onlinestudylist.com/pipermail/ccie_rs/attachments/20090705/cd96d86a/attachment.htm > > End of CCIE_RS Digest, Vol 42, Issue 34 > *************************************** > -- Bryan Bartik CCIE #23707 (R&S), CCNP Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com
