Re: [mif] Issue: message size for communicating the default route? draft-ietf-mif-dhcpv6-route-option-04

Le 28/03/2012 09:09, Tomek Mrugalski a écrit :
> On 12-03-27 14:27, Alexandru Petrescu wrote:
>> Dear participants in MIF WG,
>>
>> Currently draft-ietf-mif-dhcpv6-route-option-04 specifies that when
>> communicating a default route, the minimal message size (RT_PREFIX
>> option absent) is 46 bytes (Next Hop Option 20bytes, Route Prefix Option
>> 26bytes).
> Please re-read the draft, section 5.2. Note that prefix field itself is
> variable and its size depends on prefix-length. You seem to be
> interested in low-capability devices. Assuming you use route option to
> configure just default route, Route Prefix option is 10 bytes long, so
> the total is 30, not 46 bytes.

The total could be even smaller (20bytes?) if only one option were used, 
not two (nexthop+routeprefix).

Alex

>
>> Sometimes the draft says this Route Prefix Option may be absent for
>> default routes, thus total length could be 20bytes.
> The ability to skip Route Prefix Option used to be allowed, but that is
> not the case anymore. As I mentioned, there is still text that was
> missed during the last series of updates and it will be removed in -05.
>
> Tomek
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