Routing protocols have network-layer functionality, regardless of whether
they use an IP header, IP/UDP header, IP/BGP header, or no header at all
above the MAC header (IS-IS) to transfer their information.
If we can't agree that routing protocols have network-layer functionality,
we should just throw in the towel and agree that pigs have wings.
Priscilla
At 06:41 AM 11/11/00, George Susini wrote:
>According to the Cisco BSCN material,
>
>IGRP uses protocol number 9 and exist at layer 4
>
>RIP uses protocol number 520 (UDP) and exist at layer 7
>
>OSPF uses protocol number 89 but does not idicate where it resides
>
>EIGRP uses protocol number 88 resides at layer 4
>
>and BGP uses port number 179 and relies on TCP
>
>Very confusing .............
>----- Original Message -----
>From: "Chuck Larrieu" <[EMAIL PROTECTED]>
>To: "Zhang Jin" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
>Sent: Saturday, November 11, 2000 12:18 AM
>Subject: RE: routing protocols vs Tcp/ip model
>
>
> > Recently an instructor in a class I was taking said something I found
> > interesting. I hope I can do justice to his words.
> >
> > Network layer: IP IP IP
> > Transport layer: TCP UDP
> > Application layer: BGP RIP EIGRP, OSPF, IGRP
> >
> > In other words, he suggested that routing protocols are application layer,
> > and use the chosen transport or network layer protocols to communicate.
> > Other reading I have done kinda says this in other ways. RIP uses UDP port
> > 500. BGP, as we all know, uses TCP.
> >
> > Does this make sense?
> >
> > Chuck
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
> > Zhang Jin
> > Sent: Thursday, November 09, 2000 11:11 PM
> > To: [EMAIL PROTECTED]
> > Subject: routing protocols vs Tcp/ip model
> >
> > Dear group,
> >
> > Am I correct for locate routing protocols in TCP/IP model as follows:
> > EIGRP,OSPF=network
> > BGP,RIP=Application
> >
> > correct me.
> >
> > TIA
> > Dean
> >
> >
> > _________________________________
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>_________________________________
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________________________
Priscilla Oppenheimer
http://www.priscilla.com
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