[Gllug] Oddity in IPv6 routing

John Winters john at sinodun.org.uk
Wed Mar 26 08:31:13 UTC 2008

Robert McKay wrote:
> On Mon, Mar 24, 2008 at 11:14 AM, John Winters
> [snip]
>>  IPv4, but I don't know what the corresponding mechanism is in IPv6.  Can
>>  anyone offer any suggestions of where to look.
> Do you have a route back to your internal IPv6 network from knight?
> (This wouldn't necessarily be the case if knight had a tunnel address
> only).

Yes, I did.

The problem - as far as I can tell - was caused by knight also having an 
implicit route to the same set of addresses down the 6in4 tunnel.  At 
times it was getting confused about which to use.  I sub-netted the 
address range for the tunnel and that seems to have cured the problem.

Gllug mailing list  -  Gllug at gllug.org.uk

More information about the GLLUG mailing list