Hi Priscilla Can you put debug ip icmp in both R1 and R3 routers? or better debug ip packet detail. This is for checking if R3 is really sending six icmp ttl exceeded when traceroute is executed.
Also, you can use ping with record option set instead traceroute to see the path. I'm suspecting that frame-relay switch is not configured with frame-relay switching, but this introduce several issues about ospf. Can you check with show ip ospf database that you have only three routers.? Also you can check if frame-relay switch router is really working as a switch frame-relay sending traffic from R1 marked with DE. If this arrive to R3 without DE mean that frame-relay switch is really routing ip traffic instead of switching frames. The same test must be done between R2 and R3 Another test should be send pings from 172.16.1.1 to 172.16.2.2 with ttl set to 1, 2 and 3. Debug ip packet detail in all routers must help you to identified what is wrong Is cdp active ? If yes, can you check neighbours of R3? You must see only R1 and R3 is router acting as fr-switch is working properly. Please, could you update me with result of this issue ? I'm very interesting whit it. Regards Rafa -----Mensaje original----- De: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]] Enviado el: lunes 19 de agosto de 2002 20:27 Para: [EMAIL PROTECTED] Asunto: RE: Traceroute IP displays twice (previous post by Pri [7:51633] Hi Mark, etc. I never got a satisfactory explanation for my results with Trace Route. In my case, a particular router was claiming to be the first hop and the second hop. That's different from what we're seeing in the current question, where two different routers are claiming to be the first hop (due to load balancing). Here are the syptoms: r1#trace 172.16.2.2 Type escape sequence to abort. Tracing the route to 172.16.2.2 1 172.16.1.3 12 msec 12 msec 12 msec 2 172.16.1.3 12 msec 8 msec 8 msec 3 172.16.2.2 24 msec 20 msec 20 msec It's a frame-relay hub-and-spoke topology. I'm on one spoke trying to trace to another spoke through the hub. The trace succeeds. The network is working, but what's with the router replying twice? (It happens if I go the other way too.) The hub router is 172.16.1.3. Why is it sending back the dest unreachable twice? The topology is: R1------R3-----R2 Here are my configs: r1 ip subnet-zero no ip icmp rate-limit unreachable ! interface Loopback0 ip address 192.168.255.1 255.255.255.255 ! interface Ethernet0/0 description to Cat 5K 3/1 ip address 10.10.1.1 255.255.255.0 half-duplex ! interface TokenRing0/0 description in ring 1 ip address 192.168.1.1 255.255.255.0 ring-speed 16 ! interface Serial1/0 ip address 172.16.1.1 255.255.255.0 encapsulation frame-relay ip ospf network point-to-point frame-relay interface-dlci 133 frame-relay lmi-type ansi ! router ospf 1 log-adjacency-changes network 10.10.1.0 0.0.0.255 area 0.0.0.0 network 172.16.0.0 0.0.255.255 area 0.0.0.0 network 192.168.1.0 0.0.0.255 area 0.0.0.0 network 192.168.255.1 0.0.0.0 area 0.0.0.0 ! ip classless R3 ip subnet-zero no ip icmp rate-limit unreachable ! interface Loopback0 ip address 192.168.255.3 255.255.255.255 ! interface Ethernet0/0 description link to cat5k 3/3 ip address 10.10.3.1 255.255.255.0 half-duplex ! interface Serial1/0 description Frame relay no ip address encapsulation frame-relay no fair-queue no frame-relay inverse-arp frame-relay lmi-type ansi ! interface Serial1/0.1 point-to-point description link to R1 ip address 172.16.1.3 255.255.255.0 ip ospf network point-to-point frame-relay interface-dlci 331 ! interface Serial1/0.2 point-to-point description link to R2 ip address 172.16.2.3 255.255.255.0 ip ospf network point-to-point frame-relay interface-dlci 332 ! router ospf 1 log-adjacency-changes network 10.10.3.0 0.0.0.255 area 0.0.0.0 network 172.16.0.0 0.0.255.255 area 0.0.0.0 network 192.168.255.3 0.0.0.0 area 0.0.0.0 ! ip classless R2 ! hostname r2 ! ip subnet-zero no ip icmp rate-limit unreachable ! interface Loopback0 ip address 192.168.255.2 255.255.255.255 ! interface Ethernet0/0 description to Cat 5K 3/2 ip address 10.10.2.1 255.255.255.0 half-duplex ! interface TokenRing0/0 ip address 192.168.2.1 255.255.255.0 ring-speed 16 ! interface Serial1/0 ip address 172.16.2.2 255.255.255.0 encapsulation frame-relay ip ospf network point-to-point no fair-queue frame-relay interface-dlci 233 frame-relay lmi-type ansi ! router ospf 1 log-adjacency-changes network 10.10.2.0 0.0.0.255 area 0.0.0.0 network 172.16.0.0 0.0.255.255 area 0.0.0.0 network 192.168.2.0 0.0.0.255 area 0.0.0.0 network 192.168.255.2 0.0.0.0 area 0.0.0.0 ip classless There's a Cisco router "in the cloud" acting as a Frame Relay switch, switching from DLCIs. I don't have its config. (This was a virtual lab). Thanks for any hints you can give me. Priscilla ________________________ Priscilla Oppenheimer http://www.priscilla.com Vicuna, Mark wrote: > > While we are on the topic.. I remember a post by Priscilla a > few months > ago now (I think) with a traceroute showing 2 path entries of > the same > ip. The result of the traceroute was not able to be reproduced > (I > think). Anyone remember what the outcome of this was? > > > The archives are not searchable at this point in time. > > > Cheers > Mark. > > > -----Original Message----- > > From: Robert D. Cluett [mailto:[EMAIL PROTECTED]] > > Sent: Monday, 19 August 2002 19:10 > > To: [EMAIL PROTECTED] > > Subject: Re: traceroute IP displays twice [7:51622] > > > > > > Thanks Raj! > > > > ""Raj Santiago"" wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > i should have included this part as well to the previous > post : > > > > > > >1 172.26.1.13 20 msec > > > 172.26.1.2 20 msec > > > 172.26.1.13 20 msec > > > > > > The above indicates, of the two possible paths the router > > has [172.26.1.2, > > > 172.26.1.13] it has chosen the path 172.26.1.13. ********************************************** Noticia legal Este mensaje electrsnico contiene informacisn de BT Ignite Espaqa S.A.U. que es privada y confidencial, siendo para el uso exclusivo de la persona (s) o entidades arriba mencionadas. Si usted no es el destinatario seqalado, le informamos que cualquier divulgacisn, copia, distribucisn o uso de los contenidos esta prohibida. Si usted ha recibido este mensaje por error, por favor borre su contenido lo antes posible. Gracias. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51823&t=51823 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
