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Bypass(IPS or TAP) network cross-connect the two RJ45 connectors electrically thus creating an extended Layer 1 network

 

 Thanks for your time and knowledge. I am trying to understand how bypass mode works in terms of cross connection. 

 Bypass mode:  network relays cross-connect the two RJ45 connectors electrically thus creating an extended Layer 1 network

 

 Let us focus on one connection  COM1 ---  3560 ---  ELFIQ (Link Balancer) ---- ASA. 

 Basically ELFIQ will be a bypass mode when power is gone. 

 The engineer told me that I have to put cross cable between ELFIQ and ASA5505 only which is "2" cable from below diagram. 

 So, it will be 

 COM1 ------(Straight)-----  3560 -----(straight)------  ELFIQ (Link Balancer) -----(cross)--- ASA.

 

 

 

 And he told me also that if there is no switch (in future). I need to put both cables as cross cables. 

 COM1 ------------- (Cross) ------------------ ELFIQ-------------- (Cross) ------------------ ASA5505

 

 I couldn't see any consistency from this bypass works because case 1 (with switch) and case 2 (without switch) 

 

 Is my understanding right like below? 

 case 1: straight - straight - cross : cross

 case 2: cross - cross: straight. 

 

 

 

 

 

 

  • LAN Switching and Routing
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