包转发 Second-level Network Dispatcher (cluster 1) Server 1 (address 1) First-level Second-level User Client Network Dispatcher4LNetwork Dispatcher_7 (IP-SVA) Step 1: Document request (IP-SVA) Server N Step 2: Web-dluster selection Second-level (address N) Step 3: Packet rewriting (IP-SVA->cluster k) Network Dispatcher step 4: Packet routing (cluster m) Step 5: Web Step 6: Packet rewriting (cluster K->IP-SVA) Step 8: Document response(IP-SvA)
包转发
hp重定向 Server 1 (address 1) (address 2) User Client Intermediate DNS name server 3 step 1: Address request (URL) step 1: Address request reaches the DNs Server N step 2: WWeb-server. Tn) selection (address N) Step 3: Address mappIng (URL - address 1) step 3: Address mapping (URL - address 1) step 4: Document request (address 1) step 5: Web-server seection step 6: Http redirectlon Step 7: Document request (address 2) step 8: Document response (address 2)
http重定向