Routing loop detection control apparatus

Details Routing loop detection control apparatus Routing loop detection control apparatus

2006-12-07

2010-12-14

Ngo, Ricky (Department: 2464)

Multiplex communications

Diagnostic testing

Fault detection

C370S249000, C370S338000, C370S401000

Reexamination Certificate

active

07852776

ABSTRACT:
There is disclosed a technique which can detect a packet routing loop (in particular, a nesting loop formed by MRs (mobile routers). According to this technique, an MR114connected as a subordinate to an MR110transmits a BU (Binding Update) message, to which added is an ARO (Access Router Option) including an address of a router (MR110) connected at present, to an HA (Home Agent)140to which it pertains. Moreover, an MR112is connected as a subordinate to the MR114and, when connected to the MR112, the MR110transmits a BU message, to which added is an ARO including an address of the MR112, to the HA140. At this time, the MR112also transmits a BU message, to which added is an ARO including an address of the MR114, to the HA140. Thus, the HA140can detect a routing loop formed by connections120, 122and124.

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