Weitere ähnliche Inhalte Ähnlich wie Title Subtitle (20) Mehr von webhostingguy (20) Title Subtitle1. Global Server Load Balancing Dima Krioukov [dima@nortelnetworks.com] Alex Kit [akit@winstar.com] October 24, 2000 8. IDC IDC Core (Routing) Distribution (L3 Switching) Tier Tier Tier LB Tier Load Balancing (L4 Switching) Port Density (L2 Switching) Servers SAN 12. LSNAT Router LB S1 S2 S3 X Y src/ dst Layer Ingress Client_Port S1_Port dst Client_IP S1_IP dst LB_MAC S1_MAC dst Client_Port Virtual_Port dst Client_IP Virtual_IP dst dst Router_MAC Virtual_MAC Client_Port Client_IP LB_MAC Client_Port Client_IP Router_MAC S1_IP src L3 src src src src src Virtual_IP L3 S1_Port L4 Virtual_Port L4 S1_MAC L2 Y Virtual_MAC L2 X Egress Segment 13. LSNAT + Source NAT Router LB S1 S2 S3 X Y src/ dst Layer Ingress LB_V_Port S1_Port dst LB_V_IP S1_IP dst LB_V_MAC S1_MAC dst Client_Port Virtual_Port dst Client_IP Virtual_IP dst dst Router_MAC Virtual_MAC LB_V_Port LB_V_IP LB_V_MAC Client_Port Client_IP Router_MAC S1_IP src L3 src src src src src Virtual_IP L3 S1_Port L4 Virtual_Port L4 S1_MAC L2 Y Virtual_MAC L2 X Egress Segment 14. DSR Router LB S1 S2 S3 1 2 3 Virtual_Port Client_Port Virtual_IP Client_IP S1_MAC Virtual_MAC 2 Client_Port Virtual_Port Client_IP Virtual_IP Router_MAC S1_MAC 3 src/ dst Layer 1 Virtual_Port dst Virtual_IP dst dst Virtual_MAC Client_Port Client_IP Router_MAC src src src L3 L4 L2 15. Tunneling Router LB S1 S2 S3 1 2 3 Int: V_IP Int: C_IP V_Port C_Port Ext: S1_IP Ext: LB_IP S1_MAC LB_MAC 2 C_Port V_Port C_IP V_IP R_MAC S1_MAC 3 src/ dst Layer 1 V_Port dst V_IP dst dst V_MAC C_Port C_IP R_MAC src src src L3 L4 L2 21. How it works IDC1 IDC2 LB IDC3 LB Customer LDNS ADNS Client RDNS 1 2 3 4 5 5 6 6 6 22. How it works IDC1 IDC2 LB IDC3 LB Customer LDNS ADNS Client RDNS 7 7 8 10 11 9 32. NAT Based Client IDC1, “ wrong” V1.1; V1.2 IDC2, “ right” V2.1; V2.2 3 2 1 1 V1.1 C C V2.2 dst V1.1 C src L3 3 2 33. “Remote Servers” Client IDC1, “ wrong” V1.1 IDC2, “ right” V2.1 2 1 C V1.1 4 1 V1.1 C V1.1 V2.1 dst V2.1 V1.1 src L3 3 2 3 4 42. How it works AS1 AS2 V/20, AS3 V/20, AS3 Client ISP1 ISP2 IDC1, R1/20 IDC2, R2/20 43. How it works AS1 AS2 V/20, AS3 Client ISP1 ISP2 IDC1, R1/20 IDC2, R2/20 44. How it works AS1 AS2 V/20, AS3 V/20, AS3 Client ISP1 ISP2 IDC1, R1/20 IDC2, R2/20 48. Route Flapping AS1 AS2 V/20, AS3 V/20, AS3 Client Router ISP1 ISP2 IDC1, R1/20 IDC2, R2/20 UDP TCP