Re: length of shim6 control mesages

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

On 28-dec-2006, at 18:57, marcelo bagnulo braun wrote:

> so far we haven't considered the case where the options wouldn't  
> fit in one packet... 1280 bytes seems big enough....

Famous last words.  :-)

> what do you suggest?

Some language that tells implementers whether they can make shim6  
packets that result in IPv6 packets bigger than 1280 bytes. For  
instance:

"Shim6 signalling packets may not be larger than 1280 bytes,  
including the IPv6 header and any intermediate headers between the  
IPv6 header and the shim6 header. One way to meet this requirement is  
to omit part of the locator address information if with this  
information included, the packet would become larger than 1280 bytes.  
An implementation may impose administrative restrictions to avoid  
excessively large shim6 packets, such as a limitation on the number  
of locators to be used or a limitation on the CGA key size."