DHCPv6 Confirm in DOCSIS networks

[John Jason Brzozowski]

The operator probably has two separate DHCPv6 servers running for
redundancy.  As such, and in the absence of DHCPv6 failover support, both
servers will send an ADVERTISE.  Does one server have a higher preference
value than the other?

John

On Fri, May 18, 2012 at 8:29 PM, Erik Kline <ek at google.com> wrote:

> > It's sent to the ff02::1:2 multicast address. I'm using ISC dhclient
> > version 4.2.3-8.P2, the standard one included in Fedora 16. You can see
> > the two connections in the PCAP @ http://fud.no/get-init.pcap. Frames
> > 1-7 is the initial connection with no cached lease, 8-13 is after
> > reseating the Ethernet cable betwen my laptop and the modem. I don't see
> > anything wrong with the exchange, but maybe you have better eyes...
>
> Please pardon my ignorance, but what's that second AdvertiseXID in
> there?  It has a different server identifier and assigns a different
> address.  The Confirms all seem to be for the address in the first
> AdvertiseXID, not the 2nd.
>
> Is this normal?
>



-- 
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John Jason Brzozowski
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