| 摘要 |
<p>In a packet forwarding apparatus having a plurality of interfaces for connection to external networks, at least one of the interfaces is designated as an extension interface, and an extension apparatus having an additional function is connected to the packet forwarding apparatus via the extension interface. An ingress packet having been received by another of the network interfaces and for which the additional function is to be used is forwarded to the extension apparatus and the ingress packet processed with the additional function is inputted again to the packet forwarding apparatus via the extension interface and sent out to a corresponding external network from a network interface corresponding to the destination address of the ingress packet.</p> |
