| 摘要 |
A home agent, when receiving a binding update message containing designation of a priority level in such a status that unauthorized binding is registered in a binding cache, judges which priority level, the priority level designated in this binding update message or a priority level related to the unauthorized binding, is higher, then updates, when judging that the former is higher than the latter, the binding cache with the binging contained in this binding update message, and deletes the unauthorized binding.
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