> C2. The sharing ratio sounds a calculated result, not a ‘given’ condition;
I would very much favor having a sharing ratio as a 'given' variable, instead
of a calculated result (and instead of EA-bit length, if needed be) since it is
easier to understand, explain and work it out.
In fact, most of the examples included in the document show the sharing-ratio
being used as a given variable, so we just need to update the rules.
Cheers,
Rajiv
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On
> Behalf Of Leaf yeh
> Sent: Monday, January 30, 2012 6:38 AM
> To: Ole Trøan
> Cc: softwires WG; [email protected] team; [email protected]
> Subject: Re: [Softwires] More changes to revision 03.
>
> Ole - what's the difference?
>
>
>
> I suggested the following text for the readable .
>
>
>
> Given:
>
> End-user IPv6 prefix: 2001:db8:0012:34::/56
>
> Basic Mapping Rule: {2001:db8:00::/40 (Rule IPv6 prefix),
>
> 192.0.2.0/24 (Rule IPv4 prefix),
>
> 16 (Rule EA-bits length)}
>
> PSID offset: 4 (default value as per section 5.1.3)
>
>
>
> We get the IPv4 address, its sharing ratio and port-set:
>
>
>
> EA bits offset: 40
>
> IPv4 suffix bits (p): Length of IPv4 address (32) - IPv4 prefix length
> (24) = 8
>
> IPv4 address: 192.0.2.18 (0x12)
>
>
>
> Sharing ratio: 256 (16 - (32 - 24) = 8. 2^8 = 256)
>
>
>
>
>
> Cheers,
>
> Leaf
>
>
>
>
>
> -----Original Message-----
>
> From: Ole Trøan [mailto:[email protected]]
>
> Sent: Monday, January 30, 2012 6:16 PM
>
> To: Leaf yeh
>
> Cc: [email protected]; [email protected] team
>
> Subject: Re: More changes to revision 03.
>
>
>
> Leaf,
>
>
>
> > Again C&Qs on the examples in the newly updated candidate of MAP-03:
>
> >
>
> > A. Section 5.2 - Given:
>
> > End-user IPv6 prefix: 2001:db8:0012:34::/56
>
> > Basic Mapping Rule: {2001:db8:00::/40 (Rule IPv6 prefix),
>
> > 192.0.2.0/24 (Rule IPv4 prefix),
>
> > 16 (Rule EA-bits length)}
>
> > Sharing ratio: 256 (16 - (32 - 24) = 8. 2^8 = 256)
>
> > PSID offset: 4
>
> >
>
> > We get IPv4 address and port-set:
>
> > EA bits offset: 40
>
> > IPv4 suffix bits (p): Length of IPv4 address (32) -
>
> > IPv4 prefix length (24) = 8
>
> > ….
>
> >
>
> > C1. The ‘End-user IPv6 prefix’ shall be express as ‘2001:db8:0012:3400::/56’
> as per the section 2.3 of RFC4291;
>
>
>
> fixed.
>
>
>
> > C2. The sharing ratio sounds a calculated result, not a ‘given’ condition;
>
>
>
> what's the difference?
>
>
>
>
>
> >
>
> > B. Section 5.3 - Given:
>
> > IPv4 destination address: 192.0.2.18
>
> > IPv4 destination port: 9030
>
> > Forwarding Mapping Rule: {2001:db8:00::/40 (Rule IPv6 prefix),
>
> > 192.0.2.0/24 (Rule IPv4 prefix),
>
> > 16 (Rule EA-bits length)}
>
> >
>
> > We get IPv6 address:
>
> > IPv4 suffix bits (p): 32 - 24 = 8 (18 (0x12))
>
> > PSID length: 8
>
> > PSID: 0x34 (9030 (0x2346))
>
> > EA bits: 0x1234
>
> > MAP IPv6 address: 2001:db8:0012:3400:00c0:0002:1200:3400
>
> >
>
> > C3. I suppose the default ‘PSID offset: 4’ seems need to express in the
> > ‘given’
> conditions;
>
>
>
> OK
>
>
>
> > Q1. Have the draft stated the ‘u’ bits in the Interface-ID should be 0x00?
>
>
>
> it states that it is based on 6052. I think that should be sufficient.
>
>
>
> cheers,
>
> Ole
>
>
>
>
_______________________________________________
Softwires mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/softwires
