rainer@hwsw.gedas.de (Rainer Raupach) (03/01/91)
Hi Netlanders, we are doing a project with LMX on Token Ring. I would like to know, if there`s any installation with some 30 Token Rings connected via bridges. Does somebody know of one installation this big or even bigger? Pls email. Thx Rainer -- --- Rainer Raupach Internet: rainer@hwsw.gedas.de Network Coordinator X.400: too long to display here VW-GEDAS Berlin, GER Phone: +49 30 39007-629 / FAX : ext -999
haas%basset.utah.edu@cs.utah.edu (Walt Haas) (03/02/91)
In article <787@hwsw.gedas.de> rainer@hwsw.gedas.de (Rainer Raupach) writes: >Hi Netlanders, > >we are doing a project with LMX on Token Ring. I would like >to know, if there`s any installation with some 30 Token Rings >connected via bridges. I'm under the impression that attempting source routing with that many rings would exceed the size of the source routing field in the packet header. I'm sure somebody on the net will correct me if I'm wrong :^) -- Walt Haas haas@ski.utah.edu
franka@hpctdlb.HP.COM (Frank Actis) (03/05/91)
> > we are doing a project with LMX on Token Ring. I would like > > to know, if there`s any installation with some 30 Token Rings > > connected via bridges. > > I'm under the impression that attempting source routing with that many > rings would exceed the size of the source routing field in the packet > header. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ It depends on how you interconnect the LANs. If you use a single backbone ring, any node is only two bridges from any other system on the LAN. Backbone Ring _ A | | | | |-Bridge ---------------------- | |-Bridge ---------------------- | | . | | . | | . | | . | | . | |-Bridge --------------------- |_|-Bridge --------------------- | B As you can see, there are only two bridges between nodes A and B. If you were to connect many LANs in a serial fashion, you would quickly exceed the maximum number of hops that source routing can handle for any particular path (7). Frank Actis Hewlett-Packard Colorado Telecommunications Division franka@hpctdlb.col.hp.com