Actually I thought the MAC address used by STP was using a well known
MAC but it wasn't actually a Multicast MAC?
Darren
Priscilla Oppenheimer wrote:
>
> At 03:49 PM 1/24/01, Jim Dixon wrote:
> >Wouldn't that make it layer 2?
> >A bridge then?
> >Broadcast and don't care if I get a response?
>
> Bridges don't broadcast. They send multicasts for the spanning-tree
> algorithm, but that's not relevant. They forward broadcasts (and other
> frames), but that's not relevant either. We're talking about a single
> subnet that has two devices. The two devices probably aren't bridges. What
> would be the point of connecting two bridges together in one subnet that
> allows only two devices?
>
> Whether I get a response or not depends on what upper layer I'm using. For
> example, I could use ping to send a message from the first device
> (10.0.0.0/31) to the second device (10.0.0.1/31) on a point-to-point link.
> I should get a response (assuming the operating system would let me
> configure these addresses to start with.)
>
> If it's two routers on the ends of this point-to-point link, they are
> mostly just forwarding traffic on behalf of other stations. The IP
> addresses of the routers themselves are irrelevant in that case. In fact, I
> could use ip unnumbered, but then I couldn't ping the point-to-point
> interfaces, which makes management a bit harder.
>
> >Since I can't tell if anyone
> >is actually there, I just know that
> >someone is sending me broadcasts from somewhere on this link.
>
> What does "somewhere on this link" mean? It's a point-to-point link.
> There's only one other thing besides myself on the link.
>
> If I yell into a room that has only one person in it, "Hello, I'm trying to
> reach everyone in this room," won't I get an answer? Does it matter that I
> wasn't more precise? No.......
>
> >Correct me if my thinking is in
> >need of more coffee.
>
> You need more coffee. (or maybe less??) &;-)
>
> Priscilla
>
> P.S. Please don't send messages directly to me. Please address them to the
> group. Thanks.
>
> >Jim :)
> >
> >-----Original Message-----
> >From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]]
> >Sent: Wednesday, January 24, 2001 3:17 PM
> >To: Jeff McCoy; [EMAIL PROTECTED]
> >Subject: Re: slash 31 address
> >
> >
> >Yes, but on a point-to-point link, so what if you use the network number
> >and broadcast address to identify the two nodes? If one station sends to
> >the broadcast address it's not a problem, there's only one other station
> >anyway! I think /31 should be allowed on point-to-point links.
> >
> >Priscilla
> >
> >At 08:22 AM 1/24/01, Jeff McCoy wrote:
> >
> > >Michael...
> > >/30 = 4 address (1st is network number, 2 & 3 host ip's, 4th is broadcast
> > >address)
> > >/31 = 2 address (1st is network number, 2nd is broadcast address)
> > > no host ip's...this is not useful..
> > >/32 = 1 address (1 host address) i use this for loopbacks
> > >
> > >
> > >""Neil Schneider"" <[EMAIL PROTECTED]> wrote in message
> > >94mool$d33$[EMAIL PROTECTED]">news:94mool$d33$[EMAIL PROTECTED]...
> > > > AFAIK you can only go as far as /30.
> > > >
> > > > Neil Schneider
> > > >
> > > > <[EMAIL PROTECTED]> wrote in message
> > >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > >
> > > > >
> > > > > Hello good guys of the group, can anyone with the knowledge of ip/31,
> > >help
> > > > me?
> > > > > please.
> > > > >
> > > > > I need to know what it is use for, and how it works, pls.
> > > > >
> > > > > Thanks in advance,
> > > > >
> > > > > Michael Taiwo.
> > > > >
>
> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
>
> _________________________________
> FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
