IPv6 Server Load Balancing - DSR

Thu Aug 12 16:40:23 UTC 2010

Hi Owen, 

The DSR address is indeed on a loopback in our case.

lo        Link encap:Local Loopback  
          inet6 addr: ::1/128 Scope:Host
          inet6 addr: xxxx:xxxx:x:xxxx::xx/128 Scope:Global

The mystery continues... 

Leland

On 12 Aug 2010, at 18:28, Owen DeLong wrote:

> 
> On Aug 12, 2010, at 6:19 AM, Xavier Beaudouin wrote:
> 
>> Hi Leland,
>> 
>> Le 12 août 2010 à 15:11, Leland Vandervort a écrit :
>> 
>>> OpenSolaris ILB is open solution ;)
>>> 
>>> but yea, that's what we've started looking at -- hence LVM / HAProxy as well.. (though LVM is IPv4 only, and HAProxy is NAT only for IPv6)
>>> 
>>> does relayd support UDP as well as TCP or is it layer7 only like HAProxy ?
>> 
>> It does everything... :) L2 -> L7...
>> 
>>> In the case of ILB, I'm not convinced that it's a problem with the LB itself, but rather the idiosyncrasies of ND in IPv6 that is causing the problem.. but I may be wrong... at any rate, something's amiss ... 
>> 
>> Maybe on some setup you should desactivate ND...
>> 
>> Xavier
> 
> If you're putting the DSR address on an interface other than loopback, you probably need to turn of DAD on the interface with the DSR address otherwise DAD
> will shut down that address on the interface when it sees other servers with the same address. Sometimes it will shut down all but one, sometimes it will
> shut down all.
> 
> 
> Owen