On Wednesday, 05/18/2011 at 02:46 EDT, Marcy Cortes <marcy.d.cor...@wellsfargo.com> wrote: > Depends on how far, right? > You have to share DASD so PPRC distances apply. > You probably need the same subnet so you need a consultation with your network > folks. > But should be doable if you do those things (at least that's the plan here).
Indeed, the flat layer 2 LAN requirement is very likely going to be the limiting factor. Most sites are unwilling to extend LANs very far. There is some validity in that position since the subnet numbers are usually architected along some sort of physical boundary (e.g. city, site, building, floor). If two "halves" of a LAN each have a router in them, you can end up with a "split horizon" if the bridge connection between the halves goes down. That isn't pretty as both routers give the battle cry "To me! To me! Death to the other!" So rather than get into this situation, the network architects typically don't allow a LAN segment to extend beyond a single wiring closet. That doesn't mean you shouldn't ask, but it does mean you shouldn't be surprised if the answer comes back "No". Alan Altmark z/VM and Linux on System z Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
