Re: V6 Summarization

RU sure..?

I see it like this. If I'm off, please let me know. Also, if anyone has a
better method, I'd love to hear it.

By breaking down the v6 address to binary, bit 107 is the last matching bit
in the addresses which essentially equates to a range of 32 subnets in
decimal.

(fec0::43:0/125) ::0000000000101011:0
(fec0::53:0/125) ::0000000000110101:0

Hex to decimal conversion for the IPv6 addresses:

43 -> 67
53 -> 83

since 67 is not on a network boundary for this range (32) we'll need to
convert 64 to hex in for our network address. Thiss essentially will give a
range of 64 to 95 (or 40 to 5f in hex).

64 -> 40

*Summary = FEC0::40:0/107*

HTH

On Sun, Sep 5, 2010 at 4:37 PM, Manouchehr Omari
<manouchehr1979_at_gmail.com>wrote:

> For that two routes the summary is fec0::/118.
>
> Thanks.
>
> On Sun, Sep 5, 2010 at 4:24 PM, Ladee Geek <ladeegeek_at_gmail.com> wrote:
>
> > Hi All -
> >
> > I'm trying to summarize a few routes and the router keeps auto adjusting
> my
> > summarization. Summarization for v6 is pretty darn easy and it's driving
> > me
> > nuts.
> >
> > Summarize fec0::43:0/125 and fec0::53:0/125.
> >
> > I come up with fec0::40/98.
> >
> > The router is auto adjusting that summary for ipv rip to fec0::/98.
> >
> > I don't get it.
> >
> > thanks in advance!
> >
> > --
> > r/
> > LG
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Sun Sep 05 2010 - 17:34:33 ART