Gary White (03/21/91)
Hi- We have a big AppleTalk network involving about 50 zones, with T1 links to remote district offices using cisco routers to break up Ethernet, then with FastPaths and GatorBoxes and a lot of Macs directly on Ethernet. Currently we are running AppleTalk Phase 1, but want to switch to Phase 2 very soon. We have an established company-wide network numbering and naming scheme which it would be nice to retain; in fact our preference is to have the same net numbers after switching. Does anybody have suggestions on how to make the transition? It this best done in a crazy weekend, or are there ways we can do it zone by zone or maybe an Ethernet leg at a time? Experience with ciscos in a network would be particularly appreciated. (Currently our ciscos route AppleTalk and TCP/IP while bridging every- thing else, such as DECnet, XNS, etc. Thanks! -Gary White Exploration and Research Center
gwhite@arco.com (03/22/91)
Well, I fouled up the posting of my article about Phase 2 migration.
Replies, if sent by email, should go to
gwhite@arco.com
Thanks!
-Gary Whitehobson@madness.rutgers.edu (Kevin Hobson) (03/29/91)
Gary White writes: >Hi- ... >We have an established company-wide network numbering and naming scheme which >it would be nice to retain; in fact our preference is >to have the same net numbers after switching. >Does anybody have suggestions on how to make the transition? It this >best done in a crazy weekend, or are there ways we can do it zone by >zone or maybe an Ethernet leg at a time? >Experience with ciscos in a network would be particularly appreciated. >(Currently our ciscos route AppleTalk and TCP/IP while bridging every- >thing else, such as DECnet, XNS, etc. >Thanks! >-Gary White > Exploration and Research Center > Well, the way we will be doing this, is section of media (ethernet, token ring, localtalk, T1, 9.6K, etc.) at a time since we have cisco routing network. Since we have sectioned zonenames via media/gateway, it should be easy for us. Presently, we are testing out various appletalk gateways on a small appletalk phase 2 network. We ran into a problem where someone did not update their CAP to either EtherTalk or IPTalk (they were using UAB). Here is a statement from Chuck Hedrick about problem on one cisco gateway running appletalk phase 1: "On rucs-gw, if you do "show appletalk int" you'll note that net 85 has been forced into compatibility mode because of blake. With the phase 2 test on 83, we've now got routing information that old Appletalk routers can't make sense of. Any network that contains at least one router is flagged as being in compatibility mode. Routing updates on that network are hacked so that extended networks are shown as if they were non-extended networks. I believe only the first network in the range is shown. Because routing updates are broadcast, the presence of a single old router on a network means that all routing updates on that network must be hacked. blake is still running UAB. UAB thinks it's a router, and is sending old-format routing updates. If you'd install the current CAP software and configure it to do native etalk, this problem would vanish. The same problem will occur on any network that has old KFPS-2's, I assume. If the only router on that network is a KFPS-2, of course it's not an issue, but it could become a problem if you have a 2 and a 4 on the same network, because the presence of the 2 will force all routing updates to be hacked." Until we have update CAP to EtherTalk Phase 2, we will be only moving networks that do not have CAP host on them. So I can update our backbone networks and various little department networks one day at a time. To me, one day at a time allows us to back out of a change if something goes wrong and others things will still work during the transition in our university network. Hopefully your transition will be just as successful. -- Kevin Hobson Internet: hobson@rutgers.edu Rutgers - The State University UUCP: {backbone}!rutgers!hobson P.O. Box 879, RUCS, Hill Center, Busch BITNET: hobson@{cancer,pisces}.BITNET Piscataway, N.J. 08855-0879 PHONE: (908) 932-4780