I built the bgp lab on page 302 of halabi's book (Internet Routing Architectures).If you do not have the book, youmay still be able to answer the question. A simple diagram is as follows
RTA-----------------RTF ===============AS3 | \ | \ RTC =====AS1 RTE-------------RTD ===========AS2 However I did not use bgp multihop. I had an ebgp session from RTE to RTF. All routers except for rtc were running ospf with all networks included. When bgp network statements were added to RTA via redistribute connected command and to RTE via the network 192.68.12.0 and network 192.68.5.0 commands. I thought I would have full bgp connectivity to all networks from RTC even though synchronisation was on on each router. RTE bgp table had all routes in it with the correct as paths as well as all being best. Same was true for RTF, however RTA did not receive the 192.68.12.0 or 192.68.5.0 routes as best from RTF which prevented RTA from sending them to RTC. rtf#show ip bgp nei 172.16.1.1 adv BGP table version is 6, local router ID is 172.16.1.2 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path *> 192.68.5.0 192.68.5.2 0 0 2 i *> 192.68.12.0 192.68.5.2 0 0 2 i rta#show ip bgp nei 172.16.1.2 rout BGP table version is 6, local router ID is 172.16.1.2 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path * 192.68.5.0 192.68.5.2 0 0 2 i * 192.68.12.0 192.68.5.2 0 0 2 i This seems very strange. I believe that even with synchronisation on RTA should still advertise the routes to RTC because it has all the routes in the routing table from the ospf processes. please advise thanks Grant Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=37776&t=37776 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
