|
Thread Index [isp-bgp] Re: BGP session
When the BGP link R1-R3 goes down, what route to R3 is left in your routing table? Prhaps the easiest solution is probably to just run two seperate sessions (on separate customer IP's) keeping both sessions up but using a route-map to change the LocalPref and weigthing on the back-up link, so it is not used until the primary goes down. Do you exchange a full BGP feed with the customer or just specific ASN's..? When you provide a full BGP table I realiser this solution might be a bit costly in terms of router memory on the customer's router. This would however also reduce the route-flap that occurs when the primary goes down interfering with your traffic until a new multi-hop session is rebuilt and has updated all it's routes again. Cheers, -- Erik Haagsman Network Architect We Dare BV tel: +31(0)10-7507008 fax: +31(0)10-7507005 http://www.we-dare.nl On Thu, 2003-04-17 at 11:21, Jacques VUVANT wrote: > OK > > bgp session come up first with R3-R1 via link R3-R1(I use ip route > <loopback> <IP next-hop> on each router R1 and R3) > when link R1-R3 is down. each loopback are not reachable via R2. So the bgp > session stay down. What I try to do is to reconfigure bgp session R3-R1 > through R2, which doesn't work. > > Regards > > Jacques VUVANT > Nerwork OPT New-Caledonia > Phone : +687-267541 > Fax : +687-278444 > Mobile: +687-773121 > Mail : jacques.vuvant@... > > > ----- Original Message ----- > From: "Erik Haagsman" <erik@...> > To: <isp-bgp@isp-bgp.com> > Sent: Thursday, April 17, 2003 10:02 PM > Subject: [isp-bgp] Re: BGP session > > > > Hi Jacques, > > > > Could you be a bit more specific on what doesn't work so well? Is the > > BGP fail-over failing, are route-updates over multi-hop failing, are the > > routes taken from the back-up link instead of the primary, etc. > > Also, are the BGP links traffic-independent, or does the traffic follow > > the same route and link as the BGP updates do...? > > > > Regards, > > > > -- > > Erik Haagsman > > Network Architect > > We Dare BV > > tel: +31(0)10-7507008 > > fax: +31(0)10-7507005 > > http://www.we-dare.nl > > > > > > On Thu, 2003-04-17 at 10:53, Jacques VUVANT wrote: > > > Hello all > > > > > > I have 2 CISCO 7206 VXR routers (R1 and R2) connected in iBGP. One of my > > > customer want to use eBGP with my network, and has actually 2 link (one > to > > > each 7206 router) with his router 7206VRX (R3). So he want to use these > 2 > > > link to open eBGP session as following > > > > > > R1------------iBGP-----------R2 > > > ! ! > > > !---eBGP------R3----eBGP---! > > > > > > I've tried to open BGP session between R3 and R1 with ebgp-multihop = 10 > and > > > then hope that when link between R1 and R3 is down, to move the same bgp > > > session via R2, But it doesn't work as well. > > > > > > Someone has any idea ? > > > > > > Thanks for any help. > > > > > > Jacques VUVANT > > > Nerwork OPT New-Caledonia > > > Phone : +687-267541 > > > Fax : +687-278444 > > > Mobile: +687-773121 > > > Mail : jacques.vuvant@... > > > > > > > > > > > > ------------------------ANNOUNCEMENT--------------------------------- > > > --------------------------------------------------------------------- > > > >> ISP Technology << > > > VPN, DNS Security Management, spam, 3G, WLAN Security, P2P, VoIP, PLC, > > > 802.11i, 802.1x and much more! > > > http://www.wispcon.com/spring2003/attend-sessionlist.asp > > > The 10th Annual ISPcon, Baltimore Waterfront Marriott > > > April 23-25 > > > ---------------------------------------------------------------------- > > > ---------------------------------------------------------------------- > > > > > > > > > > > ------------------------ANNOUNCEMENT--------------------------------- > > --------------------------------------------------------------------- > > >> ISP Technology << > > VPN, DNS Security Management, spam, 3G, WLAN Security, P2P, VoIP, PLC, > > 802.11i, 802.1x and much more! > > http://www.wispcon.com/spring2003/attend-sessionlist.asp > > The 10th Annual ISPcon, Baltimore Waterfront Marriott > > April 23-25 > > ---------------------------------------------------------------------- > > ---------------------------------------------------------------------- > > > > > > > > ------------------------ANNOUNCEMENT--------------------------------- > --------------------------------------------------------------------- > >> ISP Technology << > VPN, DNS Security Management, spam, 3G, WLAN Security, P2P, VoIP, PLC, > 802.11i, 802.1x and much more! > http://www.wispcon.com/spring2003/attend-sessionlist.asp > The 10th Annual ISPcon, Baltimore Waterfront Marriott > April 23-25 > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ------------------------ANNOUNCEMENT--------------------------------- --------------------------------------------------------------------- >> ISP Technology << VPN, DNS Security Management, spam, 3G, WLAN Security, P2P, VoIP, PLC, 802.11i, 802.1x and much more! http://www.wispcon.com/spring2003/attend-sessionlist.asp The 10th Annual ISPcon, Baltimore Waterfront Marriott April 23-25 ---------------------------------------------------------------------- ----------------------------------------------------------------------
Thread Index |
|
