From: Alex De Gruiter \(AU\) (Alex.deGruiter@didata.com.au)
Date: Mon Oct 09 2006 - 19:16:11 ART
Ok next question:
If we are asked to provide redundancy without applying secondary IP
addressing, and a router (lets say R1) should be preferred over another
router (lets say R2), the options as I see them are:
1. Use HSRP, removing the IP address from R1 and re-using it for HSRP
2. Use VRRP, using the IP address on R1
My question is one of understanding - if we can not apply secondary IP
addressing and clients on a LAN should prefer a particular gateway over
another, then I believe the preferred option would be to use VRRP (?).
-----Original Message-----
From: Alexei Monastyrnyi [mailto:alexeim@orcsoftware.com]
Sent: Tuesday, 10 October 2006 3:04 AM
To: Alex De Gruiter (AU)
Cc: ccielab@groupstudy.com
Subject: Re: First-hop redundancy protocols
HSRP v3 isn't that bad to discount it :-)
IRDP support you can google,
====
IRDP (router discovery) support has been added to Windows NT 4.0. IRDP
support has also added to Windows 95 and 98 (see the "More Information"
section of this article).
==== MS knowledge base Sept 2005
Most Unix platforms support IRDP
http://www.cctec.com/maillists/nanog/historical/9811/msg00355.html
HTH
A.
on 10/9/2006 1:44 AM Alex De Gruiter (AU) wrote:
> Hello,
>
> I have 2 questions relating to first-hop redundancy protocols.
>
> 1. Lets assume that you have 2 x routers - R1 and R2. These routers
> are both connected to the same Ethernet LAN segment; devices on this
> network should use R1 as the default gateway, and R2 should take over
> in the event of failure, however hosts on the segment should only have
> 1 gateway configured. If there is nothing in the question to indicate
> secondary addressing, is using VRRP the most appropriate solution?
>
> 2. IRDP: what platforms can support this protocol (Unix, Windows?)?
> Would the following be a minimum configuration (assume, again, that R1
> is preferred):
>
> R1
>
> interface ethernet0
> ip irdp
> ip irdp preference 200
>
> R2
>
> interface ethernet0
> ip irdp
>
> Would I need anything else? I'd be interested in testing IRDP (I know,
> it's a legacy protocol, but I'm a glutton for punishment).
>
> Alex
>
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