Hi Benny, You have a recursive look up. Look at 10.1.12.0 in your cef. This is the answer. This node is reachable via 10.1.14.1. You have a destination IP on both nodes possibly.
Rgds Pj 27 lut 2012 14:54, "Benny Sumardy" <[email protected]> napisał(a): > > Hi Guys, > > These are the output of : > > IGP (RIPv2 for connecting BGP links) : > R4#sr | s router rip > router rip > version 2 > network 10.0.0.0 > no auto-summary > R4# > > show ip bgp : > > > R4#sib > BGP table version is 8, local router ID is 4.4.4.4 > 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 > *> 1.0.0.0 10.1.14.1 0 400 0 100 i > *>i2.0.0.0 10.1.23.2 0 100 0 i > *>i3.0.0.0 10.1.34.3 0 100 0 i > *> 4.0.0.0 0.0.0.0 0 32768 i > * 11.0.0.0 10.1.14.1 0 0 100 i > *>i 10.1.12.1 0 400 0 100 i > R4# > > > show ip route 11.1.1.1 & longer : > > R4#sir 11.1.1.1 > Routing entry for 11.0.0.0/8 > Known via "bgp 200", distance 200, metric 0 > Tag 100, type internal > Last update from 10.1.12.1 00:07:16 ago > Routing Descriptor Blocks: > * 10.1.12.1, from 10.1.23.2, 00:07:16 ago > Route metric is 0, traffic share count is 1 > AS Hops 1 > Route tag 100 > MPLS label: none > R4#sir 11.1.1.1 longer > Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area > N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 > E1 - OSPF external type 1, E2 - OSPF external type 2 > i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 > ia - IS-IS inter area, * - candidate default, U - per-user static > route > o - ODR, P - periodic downloaded static route, + - replicated route > > Gateway of last resort is not set > > B 11.0.0.0/8 [200/0] via 10.1.12.1, 00:07:32 > R4# > > show ip cef : > > R4#sh ip cef > Prefix Next Hop Interface > 0.0.0.0/0 no route > 0.0.0.0/8 drop > 0.0.0.0/32 receive > 1.0.0.0/8 10.1.14.1 Ethernet0/0 > 2.0.0.0/8 10.1.34.3 Serial1/0.43 > 3.0.0.0/8 10.1.34.3 Serial1/0.43 > 4.0.0.0/8 attached Loopback0 > 4.0.0.0/32 receive Loopback0 > 4.4.4.4/32 receive Loopback0 > 4.255.255.255/32 receive Loopback0 > 10.1.12.0/24 10.1.14.1 Ethernet0/0 > 10.1.12.1/32 10.1.14.1 Ethernet0/0 > 10.1.14.0/24 attached Ethernet0/0 > 10.1.14.0/32 receive Ethernet0/0 > 10.1.14.1/32 attached Ethernet0/0 > 10.1.14.4/32 receive Ethernet0/0 > 10.1.14.255/32 receive Ethernet0/0 > 10.1.23.0/24 10.1.34.3 Serial1/0.43 > 10.1.23.2/32 10.1.34.3 Serial1/0.43 > 10.1.34.0/24 attached Serial1/0.43 > 10.1.34.0/32 receive Serial1/0.43 > 10.1.34.3/32 10.1.34.3 Serial1/0.43 > Prefix Next Hop Interface > 10.1.34.4/32 receive Serial1/0.43 > 10.1.34.255/32 receive Serial1/0.43 > 11.0.0.0/8 10.1.14.1 Ethernet0/0 > 127.0.0.0/8 drop > 224.0.0.0/4 drop > 224.0.0.0/24 receive > 240.0.0.0/4 drop > 255.255.255.255/32 receive > R4# > > Traceroute : > R4#trace 11.1.1.1 > > Type escape sequence to abort. > Tracing the route to 11.1.1.1 > > 1 10.1.14.1 4 msec * 0 msec > > > Did the sh ip route 11.1.1.1, it showed 10.1.12.1 as the next hop. But the > cef listed the next hop to 10.1.14.1 (which is directly connected) rather > than 10.1.12.1 (few hops away) as commanded by Local-Pref. > Absurd, still try to find what's goin on ... Let me know if i still missed > anything... > > > Brgds > Benny > > > > > Date: Mon, 27 Feb 2012 10:32:50 +0530 > > From: [email protected] > > To: [email protected] > > CC: [email protected] > > Subject: Re: [OSL | CCIE_RS] Local Preference issue. > > > > Yes, it would be more specific route directing traffic towards 14.1 as we > > believe. Can you check routing table and CEF table for the below one. > > > > show ip route 11.1.1.1 > > show ip cef .. > > > > venkee > > > > On 27 February 2012 00:26, Rob Pool <[email protected]> wrote: > > > > > If it had the same route in an igp an r would show up because the BGP > > > route would prevent it from being inserted in the rib. However, a more > > > specific route in an igp wouldn't prevent the less specific BGP route > from > > > being inserted. > > > > > > Sent from my iPhone > > > > > > On Feb 26, 2012, at 1:49 PM, <[email protected]> wrote: > > > > > > > If it had a more specific route from another protocol, wouldn't a "r" > > > for "rib failure"show up for the route in the "sh ip bgp" command? > > > > > > > > Could an ICMP redirect from 10.1.12.1 is causing this? > > > > > > > > Doug > > > > -------- Original Message -------- > > > > Subject: Re: [OSL | CCIE_RS] Local Preference issue. > > > > From: Rob Pool <[email protected]> > > > > Date: Sun, February 26, 2012 10:41 am > > > > To: Benny Sumardy <[email protected]> > > > > Cc: CCIE ONLINE STUDY LIST <[email protected]> > > > > > > > > My guess would be that you have a more specific route being provided > by > > > an igp or static route. > > > > > > > > Sent from my iPhone > > > > > > > > On Feb 26, 2012, at 12:05 PM, Benny Sumardy <[email protected]> > > > wrote: > > > > > > > > > > > > > > Hi, > > > > > > > > > > Applied a local pref value for network 11.0.0.0 (as shown below), > so > > > the best route will prefer 10.1.12.1 (3 hops) than 10.1.14.1 (1 hop). > > > > > But when I do a traceroute, the result still gone through > 10.1.14.1. > > > Can anybody help on what's missing here? Thanks > > > > > > > > > > Rgds > > > > > Ben > > > > > > > > > > > > > > > R4(config-router)#do sib > > > > > BGP table version is 7, local router ID is 4.4.4.4 > > > > > 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 > > > > > *> 1.0.0.0 10.1.14.1 0 400 0 100 i > > > > > *>i2.0.0.0 10.1.23.2 0 100 0 i > > > > > *>i3.0.0.0 10.1.34.3 0 100 0 i > > > > > *> 4.0.0.0 0.0.0.0 0 32768 i > > > > > *>i11.0.0.0 10.1.12.1 0 400 0 100 i > > > > > * 10.1.14.1 0 0 100 i > > > > > R4(config-router)#do trace 11.1.1.1 > > > > > > > > > > Type escape sequence to abort. > > > > > Tracing the route to 11.1.1.1 > > > > > > > > > > 1 10.1.14.1 12 msec * 0 msec > > > > > R4(config-router)#do sir 11.0.0.0 > > > > > Routing entry for 11.0.0.0/8 > > > > > Known via "bgp 200", distance 200, metric 0 > > > > > Tag 100, type internal > > > > > Last update from 10.1.12.1 00:01:14 ago > > > > > Routing Descriptor Blocks: > > > > > * 10.1.12.1, from 10.1.23.2, 00:01:14 ago > > > > > Route metric is 0, traffic share count is 1 > > > > > AS Hops 1 > > > > > Route tag 100 > > > > > MPLS label: none > > > > > R4(config-router)# > > > > > R4(config-router)#do trace 11.1.1.1 > > > > > > > > > > Type escape sequence to abort. > > > > > Tracing the route to 11.1.1.1 > > > > > > > > > > 1 10.1.14.1 4 msec * 4 msec > > > > > R4(config-router)# > > > > > > > > > > _______________________________________________ > > > > > For more information regarding industry leading CCIE Lab training, > > > please visit www.ipexpert.com > > > > > > > > > > Are you a CCNP or CCIE and looking for a job? Check out > > > www.PlatinumPlacement.com > > > > > > > > > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > > > > _______________________________________________ > > > > For more information regarding industry leading CCIE Lab training, > > > please visit www.ipexpert.com > > > > > > > > Are you a CCNP or CCIE and looking for a job? Check out > > > www.PlatinumPlacement.com > > > > > > > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > > > _______________________________________________ > > > For more information regarding industry leading CCIE Lab training, > please > > > visit www.ipexpert.com > > > > > > Are you a CCNP or CCIE and looking for a job? Check out > > > www.PlatinumPlacement.com > > > > > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > > > > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, > please visit www.ipexpert.com > > > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
