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Forum Replies

  1. Hello Ray,

    In the RS, the source MAC address is the host’s MAC address, the destination is the “all routers multicast” destination FF02::2.

    About the “shutdown procedure”, I just labbed this up to see how it works. Take a look at this wireshark capture:


    The first packet (length 118) is a regular router advertisement. The second packet (length 102) is sent when the interface is shut but also when you reload the router.

    The difference between the two is that in the “goodbye” router advertisement, all ICMPv6 options

    ... Continue reading in our forum

  2. So I see this Lifetime 1800 sec in show ipv6 routers output, I guess that´s like a hold time in OSPF, how often is hello/keepalive timer sent? in IPv6 RA

  3. Hello Carlo

    The lifetime is the amount of time that a device will consider the specific router as its default router, unless informed otherwise. By default, this value is set to 1800 seconds, or 30 minutes. The RA advertisement interval, which is how often an RA is sent, is set to 30 seconds by default. Both the lifetime and the advertisement intervals can be modified on a per interface basis using the following commands respectively:

    R1(config-if)# ipv6 nd ra interval ?
        RA Interval (sec)
      msec      Interval in milliseconds


    R1(config-if)# ipv6 nd 
    ... Continue reading in our forum

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