Re: I-D ACTION:draft-huitema-multi6-ingress-filtering-00.txt

[marcelo bagnulo braun <marcelo@it.uc3m.es>]

Hi Brian,

thanks for your comments,
see below...

El 03/11/2004, a las 10:10, Brian E Carpenter escribió:

> This is useful. Just a couple of comments:
>
> >    The topology features two hosts, X and Y, whose respective sites 
> > are
> >    both multi-homed.  Host X has two global IPv6 addresses, which we
> >    will note "A:X" and "B:X", formed by combining the prefixes 
> > allocated
> >    by ISP A and B to "site X" with the host identifier of X.  
> > Similarly,
> >    Y has two addresses "C:Y" and "D:Y".
>
> Note that "X" in A:X and B:X need not be the same bit string-
> more correctly you should perhaps refer to A:X1 and A:X2,
> where X1 and X2 are two different interface identifiers for host X.

ok, i'll fix that

> Same for Y of course (and in 
> draft-huitema-multi6-addr-selection-00.txt).

same

> I don't think this changes the argument at all.

agree

> Single site exit router versus DMZ:
>
> I think there is a third case that you haven't considered, which is
> a multi-site enterprise network.  I have to draw it:
>
>
>         ISP A         ---ISP B---           ISP C
>           \          /           \           /
>            \        /             \         /
>          ------------             ------------
>         |   DMZ 1    |           |    DMZ 2   |
>          ------------             ------------
>               |                         |
>               |                         |
>          ------------    IGP      ------------
>         | sub-site 1 |-----------| sub-site 2 |
>          ------------             ------------
>
> In this scenario, prefix A, B or C may be in use at either
> of the subsites and a packet from subsite 1 with source
> prefix C may end up in DMZ 1. (Just the same if you have a
> single site exit router instead of a DMZ.) In this case,
> I think tunnels between the two DMZs (or exit routers)
> are inevitable.

agree.
do you mind if i include this example (verbatim) in the next version of 
the draft?

Thanks, marcelo



> This is a real scenario.
>
>     Brian
------------------------------------------
Please note that my former email address
mbagnulo@ing.uc3m.es is no longer in use
Please send mail to:
marcelo at it dot uc3m dot es
------------------------------------------