At 3:18 PM +0000 2/26/03, Steve Wilson wrote:
>Charles,
>The 6509 switch needs some configuration in the background to create a
>"virtual router".


A bit of a heads-up on this term. It's conceptually useful, but be 
aware that "virtual router" was considered to be an alternate VPN 
model to RFC 2547, generally promoted by Nortel and Lucent.

There have been LOTS of IETF arguments about the term. I didn't make 
myself popular at one meeting by mentioning "we sure can't define 
virtual router, but it's nice we have a virtual router redundancy 
protocol (VRRP is the standards track equivalent to HSRP)."

I was severely corrected that I needed to distinguish between 
"virtual router" and "virtual router," depending on whether the 
emphasis was on "virtual" or "router." In HSRP/VRRP, the virtual 
router refers to a single conceptual router seen by hosts, but is 
actually implemented across multiple platforms.

The VPN people thought of virtual routers as multiple independent 
routing (control and forwarding) logical instances on the same 
platform. VRF is not quite the same concept, as it assumes more 
shared knowledge between routing instances than does a VR VPN.




Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=63891&t=63728
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