[radvd-devel-l] Advertise different router?

Dyonisius Visser visser at terena.org
Thu Jun 2 08:35:29 EDT 2011

On 2 June 2011 01:24, Mark Smith
<radvd at 02a76c927861ca7413a122f2a73a0d37.nosense.org> wrote:

>> I am running the M and O flags set in our Cisco sup720/msfc3 core to deliver the RDNSS information in the DHCP packets.
>> I am also using the ipv6 dhcp relay destination command in the above Cisco config to request ipv6 DHCP addresses across VLAN's.
> I think this is a better set up. If you want to make more
> service/application settings available via a new DHCPv6 option, the only
> dependency you have is that the DHCPv6 server and the DHCPv6 clients
> that are interested in the new option support it.
> Although there are currently only a couple of RA option equivalents to
> DHCPv6 options, if you choose to go down the RA configuration path, in
> addition to caring about which clients support the RA options, you also
> have to care about which routers in your network can convey those
> options and whether the clients will ever connect to them. In a large
> network, with a variety of router models, that can be lots of checking.
> If your some of your routers don't currently support the options you'll
> also need to perform scheduled outages to upgrade their firmware or find
> some other work around. This is Dyonisius's current problem. radvd
> might be able to be used as a work around, but ultimately to
> permanently eliminate these sorts of issues, a minimal stateless DHCPv6
> client/relay/server setup is necessary.

Just to be clear, I would like to set up an IPv6-only network, that is
configured so that as much as possible devices can "just use it",
WITHOUT ANY configuration.
I'm trying to figure out what (given the limitations of our old
switch) is the Golden Way of doing things.
I know that such a set-up will be subject to change now that IPv6 is
gaining more support everywhere, but it might be an idea to document
this properly.
We all know that unfortunately for various reasons you need to run
several daemon/services/protocols in parallel to achieve to seemingly
simple goal.
What comes to mind is a list of devices (windows7, MacOSX, Android,
iOS) that can be selected, and then some advice of what is needed for

FYI: I will replace the clunky Cisco in 1-2 months, so this is all a
temporary situation.
The new switch will of course need to support all the needed features.

Dyonisius Visser
System & Networking Engineer
TERENA Secretariat
Singel 468 D, 1017 AW Amsterdam
The Netherlands
T +31 20 530 44 88 F +31 20 530 44 99
visser at terena.org | www.terena.org

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