2011/10/19 Mark Tinka <[email protected]> > On Thursday, October 20, 2011 12:49:39 AM Keegan Holley > wrote: > > > +1 on the $$$. Still PE is one network P+PE is > > essentially two networks. > > No. P + P/PE is one network. > > P + P/PE are two devices. >
Maybe I was a bit loose with the details here. My only point was that the portion of the network where the P routers live has different rules than the edge. > > > I still don't see how this > > adds to complexity. For most commonly used features the > > per-hop-behavior is the same on the PE router whether > > the packet came from a core P router or another PE > > router. > > There are many features that are not turned on on core > routers, which are on edge routers. > > I can't recall the last time I logged into our core routers > for anything other than to add a new link. You don't want to > know how often our Provisioning team are logging into the PE > routers. > > If one PE router goes down, I don't have to worry about 25% > of the country feeling the pinch, as I have that > abstraction. > Well I think we both can agree that the network you work in requires P routers for a number of reasons. I understand the feature differences between the P and PE routers. The point was that people implement P routers for different reasons, but not for their own sake. I wouldn't use a collapsed core to route 25% of a county let alone a country. > > > Maybe I'm missing something, but PE routers are > > not going everywhere and if we're strictly talking about > > complexity it's easier to manage one network instead of > > 2. > > It's all one network. What's more than one is the devices, > not the network itself. > > Even if it may seem trivial, it's important to make this > distinction, because successful networks are always scaling > up, and scaling up means buying more kit whether we like it > or not, i.e., device numbers go up, sometimes because you > want to delineate functions. > +1 I like the pay as you grow model. If you are small just use a collapsed core. As your customer base grows you can move customers to create a core layer or just buy more links and more boxes. Chances are that if the original poster needed a separate core he wouldn't be here asking the question. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
