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- Number: A2TH081090U289
- Subject: Mixing Old and New Token-Ring Source Routing
- Date: September 11, 1990
- OS Version: All
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
- GENERAL
- INFORMATION: Here is some pertinent information on updating to the new
- Token-Ring drivers:
-
- The problem is that the old source routing drivers would
- not see a packet without an RI field in it. The new
- drivers, in order to save time and energy, check the
- destination and if the destination is on the same ring,
- they do not put in an RI field. Therefore, any nodes
- (file servers, bridges, workstations etc.) with old
- source routing drivers installed will not see the packets.
- So the file servers will not update their routing tables,
- workstations will not connect, etc. If there is a bridge
- between the old and new drivers, then everything is okay.
-
- So if the rings are all separated by IBM's bridges, then
- they can update one ring at a time and be fine as long as
- every single node on the ring is updated at the same time.
- If the rings are separated by our routers, then the
- process is more difficult, since neither NETGEN or BRGEN
- will let you mix old and new drivers. So for this
- situation the customer will need our nonoptimizing
- routers. These are available in the private area of
- NetWire named TEMPRT.ZIP.
-
- (X) This information was verified in the lab.
-
-