From: Peter Rybaczyk (psrsam@xxxxxxxxxxxxx)
Date: Thu Aug 16 2001 - 18:02:09 GMT-3
Nathan,
I am assuming that you are talking about the DLSW border peers and border peer
groups. Here are my thoughts beginning with the fundumentals of DLSW:
1. You need at least two DLSW peers to make DLSW work for non-routable traffic
across an IP backbone.
2. If on each side of the backbone you have X number of routers (instead of jus
t
one) and you need full DLSW connectivity between each router on one side with
every router on the other side, then you start running into the problem of too
many connections across the cloud, i.e., the any-to-any issue.
3. However, if on each side of the cloud, one out of X routers (say router Y) i
s
chosen as the border peer, and all of the others on each side configure Y as it
s
remote peer, and Y from one side peers with Y from the other side, then you've
accomplished the objective of reducing the number of connections across the clo
ud.
4. The connections on each side of the cloud between Y and the rest become dyna
mic
(pod = peer on demand, when you view them with show dlsw peers)
5. So to relate this to route reflectors, there are similarities, but differenc
es
as well. The biggest difference that I see is that you can have a single route
reflector in a transit AS, but you need to have at least two DLSW border peers,
one on each side of the cloud.
If anyone sees any flaws here, please correct. With 10 days to go before 1st
attempt, I am working on refining many concepts and would not want to mislead
anyone.
Thanks.
Peter
Nathan Cruz wrote:
> Hi, I'm working on peer groups in DLSW and I'm trying to get a concept down.
>
> Question if I had 3 or four routers could I make them into ONE (1) peer group
> and have any to any connectivity?
>
> I guess it boils down to do the routers within a peer group have dynamic
> access to all the other routers in the same peer group or is this "any to any
"
> connectivity only to routers in other peer groups?
>
> I'm imagining this to be sort of like route-reflectors in BGP? But I'm no
t
> sure.
>
> Any help, thoughts, or comments appreciated.
>
> Nathan
> **Please read:http://www.groupstudy.com/list/posting.html
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