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596 Views 4 Replies Latest reply: Jul 23, 2012 11:51 PM by Furkan RSS

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IPv6 Router Advertisement

Jul 23, 2012 2:17 AM

Furkan 18 posts since
Mar 8, 2012

Hi ,

1- On Cisco routers, after you configured an IPv6 address on an interface, will the router start sending router advertisement messages or no ipv6 nd suppress-ra command needed?

 

2- For prefix delegation, can CPE router start router advertisement after take a prefix from delegating server? What about if I restart CPE router? Does it continue advertise same prefix to its clients with RA?

 

It is some confusing...

 

DHCPv6-01.gif

  • cadetalain 2,642 posts since
    Sep 18, 2008
    Currently Being Moderated
    1. Jul 23, 2012 6:36 AM (in response to Furkan)
    Re: IPv6 Router Advertisement

    Hi,

     

    1) as the default is no ipv6 unicast-routing then the router won't send any RA and won't reply to any RS.

    Once you have enabled ipv6 routing then it send RAs and reply to RS unless you configure  ipv6 nd suppress-ra on the interface

    I don't know for question 2 as I've never used nor labbed the prefix delegation feature yet.

     

    Regards.

     

    Alain.

  • cadetalain 2,642 posts since
    Sep 18, 2008
    Currently Being Moderated
    3. Jul 23, 2012 8:00 AM (in response to Furkan)
    Re: IPv6 Router Advertisement

    Hi Furkan,

     

    if you want to suppress RA then you need to do ipv6 nd suppress-ra on the interface because by default if ipv6 unicast-routing is turned on it will send RAs and reply to RS.

    If you don't save the config then indeed you will get the default params from RAs.

     

    Regards.

     

    Alain.

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