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Technique for transmitting incoming multi-link point-to-point (PPP) packet traffic over multiple outgoing links in a multi-link bundle
| Details |
Inventors: Maurya, Sanjiv Kumar;
Assignee: 3Com Corporation (Santa Clara, CA)
Primary Examiner: Pham; Chi H.
Assistant Examiner: Pham; Brenda H.
Attorney, Agent or Firm: Michaelson & Wallace, Michaelson; Peter L.
A communications technique which permits incoming multi-link point-to-point (PPP) packets of a common PPP frame to be simultaneously transmitted across more than one outgoing link in a multi-link bundle. Specifically, during LCP negotiations, a multi-link PPP originator assigns itself a unique endpoint discriminator value and informs all its immediate PPP peers by sending the latter, via a first bundle of outgoing links, an LCP Endpoint Discriminator packet containing this value. Each of these immediate PPP peers assumes, as its endpoint discriminator, the value that has been provided to it in the LCP Endpoint Discriminator packet it receives from the originator and then sends an LCP Endpoint Discriminator packet containing this same endpoint discriminator value, via a second bundle of outgoing links, to all of its immediate PPP peers. This is recursively repeated until all hierarchically inter-connected multi-link PPP devices at one end of a pipe, which fan-out from the originator, have set their endpoint discriminators to the same value. Consequently, all the links in the pipe will be viewed, by the multi-link protocol, as part of a common bundle. |
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DETAILED DESCRIPTION The present invention overcomes the deficiencies in the art and satisfies these needs by setting, in direct contravention to conventional multi-link protocol processing, an endpoint discriminator of each multi-link PPP device, connected to one end of a pipe to be formed of several physical outgoing links, to the same value as that of a neighboring PPP device that generates incoming multi-link PPP packets to the former device for transport over the outgoing links.
This use of neighboring endpoint discriminator values is recursively employed at each end of the pipe to encompass all hierarchically connected multi-link PPP devices thereat, including a multi-link PPP originator thereat.
As a result, all the multi-link PPP devices at one end of the pipe share a common endpoint discriminator value.
Consequently, a BRI ISDN terminal adapter like device that utilizes my invention can accept and negotiate the multi-link protocol on its data terminal equipment (DTE) side where, conventionally, such a device has only one link and will accept an endpoint discriminator provided from its DTE side and use this discriminator to negotiate the multi-link protocol on multiple outgoing links connected to the device, e.
g.
, on its public switched telephone network (PSTN) side.
In accordance with my specific inventive teachings, setting identical endpoint discriminators is readily accomplished during LCP negotiations wherein a multi-link PPP originator, such as, e.
g.
, a server or a client application executing at a PC, assigns itself a unique endpoint discriminator value and informs all its immediate PPP peers, such as neighboring terminal adapters, by sending the latter, via a first bundle of outgoing links, an LCP Endpoint Discriminator packet containing this value.
Each of these immediate PPP peers, rather than assigning itself a unique endpoint discriminator value, assumes the value that has been provided to it in the LCP Endpoint Discriminator packet it receives from the originating device, as its own endpoint discriminator
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