EIGRP = All Cisco environment. Routing things other than IP. Super distance
vector protocol, relatively easy to configure and get going
OSPF = open, so works in mixed vendor environment. IP only. Demands
discipline and structure in the design, but in a small environment can be
relatively easy to configure once one understands certain fundamentals.
OSPF cost = 100,000.000 / bandwidth lower cost = shorter path ( in
general )
EIGRP metric more complex and less comprehensible ( to us mere mortals :-> )
In my mind this is less relevant. I don't think various path metrics are at
the top of any list when choosing routing protocols.
Why use one over the other? Two big factors in my mind are mixed vendor
versus all Cisco environment and IP only versus multiple protocols. Third on
the list is the design aspect. OSPF requires a certain structure. EIGRP
allows one to be less structured. This is not necessarily good, by the way.
Just one opinion.
Chuck
-----Original Message-----
From: Niraj Palikhey [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, June 06, 2000 2:35 PM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: RE: EIGRP contiguous AS
Hi,
I know that this question of mine is not related to this post but since you
all are talking about EIGRP and seem to know the subject matter, I would
like to ask abou the differencs b/w EIGRP and OSPF? What are the major
differences b/w EIGRP and OSPF aside from the fact that EIGRP is Cisco's
proprietary protocal and OSPF is open?
Why would one use EIGRP over OSPF and vice-versa?
I know that EIGRP uses bandwidth as it's metrics and OSPF uses cost but
which one is a better metric?
Please advise.
Thank you.
Kind regards,
[EMAIL PROTECTED]
>From: "Chuck Larrieu" <[EMAIL PROTECTED]>
>Reply-To: "Chuck Larrieu" <[EMAIL PROTECTED]>
>To: "Cisco Mail List" <[EMAIL PROTECTED]>, "Kenny Sallee"
><[EMAIL PROTECTED]>
>Subject: RE: EIGRP contiguous AS
>Date: Mon, 5 Jun 2000 20:50:06 -0700
>
>Excellent!!!!!
>
>-----Original Message-----
>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
>Kenny Sallee
>Sent: Monday, June 05, 2000 1:49 PM
>To: Gerwin Boschloo; 'Luong, David'; 'Robert Padjen'; [EMAIL PROTECTED]
>Subject: Re: EIGRP contiguous AS
>
>Sure it will work -- if you redistribute. This is where you will possible
>see routing loops.
>
> You can also create a tunnel interface on both EIGRP routers and share
>EIGRP info that way. This way they will both look like they are directly
>connected. Here's a possible config for the tunnel:
>
> (e0) r1(s0) -----(s0) r2(s1) -----(s0)r3(e0)
>
>r1 and r3 e0 interfaces are in the 172.16.0.0 address space
>All serial interfaces are in the 192.168.0.0 address space
>r1 and r3 are running eigrp
>r2 is running igrp with someone else
>
>r1:
>int e0
>ip address 172.16.2.1 255.255.255.0
>
>int tunnel 0
>ip address 172.16.1.1 255.255.255.0
>tunnel source <r1 ip to r2>
>tunnel destination <r3 ip to r2>
>....
>....
>router eigrp 100
>network 172.16.0.0
>no auto
>
>r3:
>int tunnel 0
>ip address 172.16.1.2 255.255.255.0
>tunnel source <r3 ip to r2>
>tunnel destination <r1 ip to r2>
>
>router eigrp 100
>network 172.16.0.0
>no auto
>
>
>Kenny
>
>----- Original Message -----
>From: "Gerwin Boschloo" <[EMAIL PROTECTED]>
>To: "'Luong, David'" <[EMAIL PROTECTED]>; "'Robert Padjen'"
><[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
>Sent: Sunday, June 04, 2000 11:16 PM
>Subject: RE: EIGRP contiguous AS
>
>
> > EIGRP and IGRP are both Interior Gateway Protocols that are used inside
>a
> > AS. Therefore, when you want to connect different AS'es, you need an
> > Exterior Gateway Protocol like BGP. Within BGP you are routing to
>different
> > AS'es therefore the AS'es should be unique.
> >
> > Therefore: EIGRP AS 1 ---- IGRP AS 50 ---- EIGRP AS 1 will not
>work.
> >
> > Gerwin
> >
> > -----Original Message-----
> > From: Luong, David [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, June 01, 2000 1:14 AM
> > To: 'Robert Padjen'; [EMAIL PROTECTED]
> > Subject: RE: EIGRP contiguous AS
> >
> >
> >
> > If I remember correct, AS numbers do not have to be contiguous unless if
>you
> > want automatic redistributing between EIGRP and IGRP. If you have
>different
> > AS across boundaries then you will need to have to manually
>redistribute..
>.
> >
> > My $0.02...
> >
> > David Luong, CCNA,Network+,A+,i-Net+
> > Telecommunications Analyst
> > Insurance Corporation of B.C.
> > Vancouver, B.C CANADA
> >
> >
> > -----Original Message-----
> > From: Robert Padjen [ mailto:[EMAIL PROTECTED]
> > <mailto:[EMAIL PROTECTED]> ]
> > Sent: Wednesday, May 31, 2000 3:18 PM
> > To: [EMAIL PROTECTED]
> > Subject: EIGRP contiguous AS
> >
> >
> > I have an interesting question for the group, although
> > it is not directly related to any of the current
> > exams.
> >
> > Does an EIGRP AS have to be contiguous or can it be on
> > two sides of an IGRP 'AS'. I note that the use of the
> > term AS is a mis-nomer for both protocols, but...
> >
> > For example, does:
> >
> > EIGRP AS 1 ---- IGRP AS 1 ---- EIGRP AS 1
> >
> > pose a problem?
> >
> > Does:
> >
> > EIGRP AS 1 ---- IGRP AS 50 ---- EIGRP AS 1
> >
> > My belief is that it could work, but it breaks the
> > concept of an AS and could lead to routing topology
> > table problems. Any takers?
> >
> > (I'll be working with my team in the lab, but thought
> > it was an interesting thought questions.)
> >
> > Nothing but net!
> >
> > =====
> > Robert Padjen
> >
> > __________________________________________________
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> >
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