Re: address pair exploration, flooding and state loss

[Iljitsch van Beijnum <iljitsch@muada.com>]

On 31-mei-2005, at 19:21, Erik Nordmark wrote:

> > - after a rehoming event, context loss is detected upon the  
> > reception of any packet associated with the shim session, whether  
> > signalling packet or data packet. for that, data packets need to  
> > carry at least one bit that identifies them as belonging to a shim  
> > session.

> Makes sense to me.

It is indeed necessary to determine that a higher layer session or  
association belongs to a shim session. However:

- That doesn't necessarily mean that this can be determined for an  
individual packet. Another way to do this would be the "ICMP bad  
checksum" message that I suggested a few days ago.

- Even if we want to determine the shim status of individual packets,  
we don't necessarily need a bit for this. For instance, when locator- 
only addresses and ULID addresses are disjunct this can be determined  
from the destination address.