[148909] in North American Network Operators' Group
Re: Choice of address for IPv6 default gateway
daemon@ATHENA.MIT.EDU (Mohacsi Janos)
Thu Jan 26 04:51:25 2012
Date: Thu, 26 Jan 2012 10:50:36 +0100 (CET)
From: Mohacsi Janos <mohacsi@niif.hu>
To: Mathias Wolkert <tias@netnod.se>
In-Reply-To: <4F2119FE.3020502@netnod.se>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Thu, 26 Jan 2012, Mathias Wolkert wrote:
> Hi
>
> On 1/25/12 23:53 , Owen DeLong wrote:
> [...]
>> Note, you can use RA for default gateway while still using static addressing.
>
> Could you give me a little bit more on this?
>
> It seems to me that most platforms stop listening to RAs once you give
> them a static address.
Static address + RA working on FreeBSD and Linux. Sorry we don't have
other servers, where we are using statically configured IPv6 addresses.
>
> Letting a host run slaac and then add a static address is not good
> enough as the slaac address might be chosen for locally generated packets.
Define for every application your bind address - locally generated packets
will use it. If it is not possible Use RFC 3484 source address selection
for selecting static source addresses.
>
> If it works with listening on RAs when running with statically
> configured address, why HSRP/VRRP?
Statically configured default gateways worked for us with VRRP/HSRP.
VRRP/HSRP is for first-hop redundancy.
Best Regards,
Janos Mohacsi
