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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