From: Peter van Oene (pvo@usermail.com)
Date: Thu Dec 05 2002 - 12:42:16 GMT-3
At 08:12 AM 12/5/2002 -0600, Jason Cash wrote:
>I am reading the BGP Case studies on the cisco site:
>
>http://www.cisco.com/warp/public/459/16.html#A24.0
>
>And it states :
>"It is normal in an AS to have BGP speakers that do not understand the
>concept of route reflectors. We will call these routers conventional BGP
>speakers. The route reflector scheme will allow such conventional BGP
>speakers to coexist. These routers could be either members of a client
>group or a non-client group. This would allow easy and gradual migration
>from the current IBGP model to the route reflector model. One could
>start creating clusters by configuring a single router as RR and making
>other RRs and their clients normal IBGP peers. Then more clusters could
>be created gradually.
>It then shows a diagram and then states:
>"In the above diagram, RTD, RTE and RTF have the concept of route
>reflection. RTC, RTA and RTB are what we call conventional routers and
>cannot be configured as RRs."
>My question is this.for what reason would a router not be able to be
>configured as a Route Reflector. Is route reflection a Cisco
>proprietary feature or am I just reading this wrong. Searching on the
>site, I see the commands was available from IOS 11.1.
>What exactly would define a conventional router?
I expect that they are simply inferring that it is possible to have routers
from vendors who haven't implemented route reflection in their BGP offering
participating in your network. Since the route reflection client has no
role in, nor awareness of route reflection, compatibility here is not an
issue should you wish to use these such routers in your BGP network. I am
not aware of any routing vendors who do not include route reflector server
capabilities in their offering however.
Route Reflection is defined in RFC2796 (originally 1966) last I checked
and is thus not proprietary to Cisco.
Pete
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