| 摘要 |
<p>PROBLEM TO BE SOLVED: To keep security between VPNs(virtual private networks), and to keep QoS(quality-of-service) control and compatibility of label information by setting a plurality of paths according to different VPNs. SOLUTION: A MPLS(multi-protocol label switching) capsuled header 100 contains, for example, a label region (Label: Label Value) 1-1, an experimental region (Exp: Experimental Use) 1-2, a stack region (S: Bottom of Stack) 1-3, and lifetime information (TTL: Time to Live) 1-4. This MPLS capsuled header 100 is added in front of the data such as frames or cells in accordance with a label adding procedure. In Label 1-1, forwarding information (FWD Info) 1-1-1 and VPN 1-1-2, for example, are allocated.</p> |
