RE: V6 Summarization

Hi Ladee,

I think your router may be correct :}

fec0::43:0/125 is also fec0::0043:0000/125, right? So the fec0::
represents 96 bits (128-32). Counting just the double hex zeros before the
four gets you to 96 + 8 = 104 bits. Your /98 summary captures just the
first two zero bits of ::0000 0000 0100 0011:0000 0000 0000 0000

Looks to me like your summary should be /107. Check out the last 32 bits of
each:

first 96 bits::0000 0000 0100 0011:0000 0000 0000 0000
first 96 bits::0000 0000 0101 0011:0000 0000 0000 0000

HTH,

Bob Sinclair CCIE 10427 CCSI 30427
CIERS2 Online Instructor
www.tinyurl.com/ciers2online

> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Ladee Geek
> Sent: Sunday, September 05, 2010 4:25 PM
> To: Cisco certification
> Subject: V6 Summarization
>
> 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
>
>
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Received on Sun Sep 05 2010 - 18:08:03 ART