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Forum Replies

  1. Hi Diana,

    Glad to hear you like it!

    There’s not really a short answer to your question. Technically, ND doesn’t require MLD to work.

    IPv6 ND uses multicast and the solicited node multicast addresses.

    Using multicast instead of broadcast sounds effective but in reality, your ND traffic is probably still broadcasted since your L2 switches don’t know where to forward the multicast traffic to.

    To improve this, you could enable MLD snooping on the switches. Your hosts will have to report what they want to receive through MLD and then the switch will be able to deliv

    ... Continue reading in our forum

  2. Hi,
    My topo:
    [R1]----[R2]
    When both router booted up, I first configured R1 interface as 2001::1/64 IPv6, and hasn’t configured R2 yet. But I can see from packet capture that R1 is sending NS and NA both. Without configuring R2, why R1 sent NA? And after that, if I configure R2 with 2001::2/64 interface, I notice the same behaviour. Please find the pcap and interface show o/p. Please let me know the correct behaviour?
    ==============================
    PCAP: https://www.cloudshark.org/captures/623abeaa7dc5
    ==============================

    R1:
    ESW1#sh ipv6 int f0/0
    Fa
    ... Continue reading in our forum

  3. Hello Rahul

    Whenever you configure an interface to function as an IPv6 interface, it automatically sends out NS messages.
    This will occur even BEFORE any IPv6 addresses have been configured. You can see from your capture and from your CLI that you have posted, that both R1 and R2 have link-local addresses of FE80::C001:8FFF:FEEF:0 and FE80::C001:8FFF:FEF7:0 respectively.

    As for the NA message, those are sent under two conditions: The first is as a response to an NS and the second when there is a change in the link-layer address of a node on a local link. Wh

    ... Continue reading in our forum

  4. if you also have a global unicast address configured on an interface, this ipv6 NS/NA process should it be done again by the router, for every type of ipv6 addr (unique local, global unicast, , link-local)?

  5. Yes, off course it helps !

    Thank you so much for your time and reply. Have a nice weekend.

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