IPv6 uses multicasts instead of broadcasts, so unlike ipv4 where a
/31 is unuseable the /127 works just fine. I have half a dozen working
ipv6 tunnels to prove this :-)
Brad Beck wrote:
>
> Interesting.... I'm curious how you can have a /127 address, since this
> allows you only a network and broadcast, but no host bits....
>
> Am I missing something??
>
> -Brad
>
> Brad Beck, CCNA
> WAN Administrator
> Diva Systems
>
> > ipv6 address 3FFE:B00:4007:C12::6/127
>
> At 10:06 PM 5/15/00 -0500, neal rauhauser wrote:
> > I've colocated a Cisco 7120 at pensat.com and I am working with an
> >engineer there to get ipv6 tunnels working. I've got half a dozen set up
> >but we need to hit 40+ before they qualify for the next size block of
> >IPv6 numbers.
> >
> >
> > IPv6 is interesting but there are some other goodies that come with
> >this connection as well.
> >
> > We've got the 7120 set up with enough ram to do BGP and we'll be
> >turning that on shortly. I've got a 7505 with enough guts to do that job
> >as well and I am planning on using it to give people hands on in
> >something like a production BGP environment. I think the 7120 will be
> >accessible but only in login and not enable mode.
> >
> > I am also in the process of installing an ISDN dial lab at work that
> >will be accessible only via IPv6. Its got an AS5200, an Adtran TSu 600
> >for analog calls, an Atlas 800 to do ISDN switching, and some Cisco
> >1003s as clients. This should be ready within the next month or so.
> >
> > The initial config is not very difficult - you just need a CCO login
> >so you can get the IPv6 software for your router or I can set you up
> >with the 7120 image if that is your platform - its not released for beta
> >yet but a kind Cisco developer 'loaned' me a copy. Once you have your
> >software this is about all you need to get started.
> >
> >! this is really all that is required besides the single default ipv6
> >route
> >interface Tunnel95
> > description ipv6 link to Optimum Data Switching Lab 3ffe:b00:4007:5/64
> > no ip address
> > no ip directed-broadcast
> > ipv6 enable
> > ipv6 address 3FFE:B00:4007:C12::6/127
> > tunnel source 209.58.21.221
> > tunnel destination 24.3.235.22
> > tunnel mode ipv6ip
> >
> > If this is something you are interested in please email me at
> >[EMAIL PROTECTED]
> >
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