Task 6.2 Frame-relay map ipv6 questions


in my first attempt to do this task, i configured R2 with:

frame-relay map ipv6 FE80::CE00:8FF:FE40:0 201 broadcast

I used the brodcast keyword because without this word, i had this debug:

Mar 1 03:50:16.031: IPV6: source FE80::CE01:8FF:FE40:0 (local)
Mar 1 03:50:16.031: dest FF02::5 (Serial1/0)
Mar 1 03:50:16.035: traffic class 224, flow 0x0, len 80+0, prot 89, hops 1, originating
Mar 1 03:50:16.035: IPv6: Encapsulation failed
Mar 1 03:50:16.039: IPv6: Resolving next hop FF02::5 on interface Serial1/0

But the IE solution is:

frame-relay map ipv6 FE80::204:27FF:FEB5:2F60 201
frame-relay map ipv6 2001:141:1:12::1 201 broadcast

So, my questions are:
Why do they use a second frame-relay map about the global ipv6 address.
And why do they omit the broadcast keywork for the link local ?

Thank you


  • Richard,

    It doesn't matter which map statement has the broadcast keyword, as long as there is a map statement for the protocol (ip/ipv6) to the dlci that does have the broadcast keyword. Placing the broadcast keyword on both map statements would double the amount of broadcast/multicast traffic carried over the dlci.

  • Thank you Darrell.

    You seem to be right.
    I tried to configure brodcast" only once, either on the link local map, or on the global map. In theses cases, the packets with the FF02::5 destination are well encapsulated.

    But i cant see a potential problem if i use only one map ("the link local map"). I can ping from R5 routers like BB2, R1, R2 (the wan link).

    Any comment about the need of the map relative to the global adresse would be greatly appreciated.

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