Choice of address for IPv6 default gateway

Mohacsi Janos mohacsi at
Thu Jan 26 09:50:36 UTC 2012

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

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