bbfaye wrote:
>
> That's what I confusing.
> if I use /31s to the link address, it seems there's no address
> for network
> address and broadcast address in this subnet.
> How could it work?
It's only used on point-to-point links. There's no need for a broadcast
address. If you want to send to everyone else in this network, you just send
to the device on the other end. It's the only other device on this subnet.
An address of 0 meant broadcast in some older (late 80s, early 90s)
implementations but it was a misreading of the RFCs. An address of 0 is
meant to be used when referring to a network in documentation or a network
diagram, for example. It never meant "the whole network" from a destination
address viewpoint. There's no reason you can't use it on a point-to-point
link.
Apply logic, not rules.
_______________________________
Priscilla Oppenheimer
www.troubleshootingnetworks.com
www.priscilla.com>
>
> at 12 Oct 2002 15:10:36 -0000 , [EMAIL PROTECTED]
> ("bergenpeak") wrote:
> --
>
> >/31s are supported on FE and GE link types (as well as POS,
> etc.)
> >However,
> >cisco backed out support in some early versions of the 12.1
> code train
> >(ie
> >it worked in some versions of 12.0, didn't work in some 12.1,
> and now
> >appears
> >to work again).
> >
> >RFC 3021 provides details.
> >
> >
> >
> >bbfaye wrote:
> >>
> >> I used thought it shoul be /30 mask subnet...
> >> but recently I saw some guy said: use /31 subnet to save the
> address....
> >> I really confusing me...
>
>
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=55519&t=55458
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
