3.1 Hub and Spoke - new question - help

Hello Folks,

Can anyone bring me some light regarding this question? I've configured this without pbms but later on I've realized that my OSPF domain is broken. From any router within the Area 0.0.0.0 (R1-R3-R6) I cannot reach any prefix outside it (only Serial interface of R1) and the same happens for routers non area 0. I suspect that I missing something regarding PPPoFR Hub and Spoke.

Also for troubleshooting and simplicity sake I've configured only Area 0.0.0.0 for routers (R1-R3-R6) and Area 125 for (R1-R2-R5) but no success. If I configure simple FR (no PPP over FR) for R1-R2-R5 there is no pbms at all.

 

Thanks in advance for your help..... Victor.

 

 

 

Comments

  • 2011 Update;

    The following was my solution:


    RSRack9R2#sh run int s0/0

    interface Serial0/0

     no ip address

     encapsulation frame-relay IETF

     no frame-relay inverse-arp

     frame-relay lmi-type cisco

    !


    interface Serial0/0.1 multipoint

     ip address 128.9.125.2 255.255.255.0

     frame-relay map ip 128.9.125.1 205 broadcast

    !

    end



    RSRack9R1#sh run int s0/0

    interface Serial0/0

     no ip address

     encapsulation frame-relay IETF

     no frame-relay inverse-arp

     frame-relay lmi-type cisco

    !


    interface Serial0/0.1 multipoint

     ip address 128.9.125.1 255.255.255.0

     frame-relay map ip 128.9.125.2 105 broadcast

    end



    RSRack9R5#sh run int s0/0/0

    interface Serial0/0/0

     no ip address

     encapsulation frame-relay IETF

     no frame-relay inverse-arp

     frame-relay lmi-type cisco

    !


    interface Serial0/0/0.1 multipoint

     ip address 128.9.125.5 255.255.255.0

     frame-relay interface-dlci 501

     frame-relay interface-dlci 502

    !



    RSRack9R5#sh fram map

    Serial0/0/0.1 (up): ip 128.9.125.1 dlci 501(0x1F5,0x7C50), dynamic,

                  broadcast,

                  IETF, status defined, active

    Serial0/0/0.1 (up): ip 128.9.125.2 dlci 502(0x1F6,0x7C60), dynamic,

                  broadcast,

                  IETF, status defined, active

     

    Am I violating rules here?


  • RSRack9R5#sh fram map

    Serial0/0/0.1 (up): ip 128.9.125.1 dlci 501(0x1F5,0x7C50), dynamic,

                  broadcast,

                  IETF, status defined, active

    Serial0/0/0.1 (up): ip 128.9.125.2 dlci 502(0x1F6,0x7C60), dynamic,

                  broadcast,

                  IETF, status defined, active

     

    Here you are learning these mapping via inverse-arp, which is not allowed in the question saying that " Do not use Inverse-ARP"

  • Little old thread but thanks Dcancerian :-)

  • ya. i got the same issue. after doing SG configurations, i have reachibility issues. while normal multipoint configuration seems to work just alright.

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