кабель для стека только один. соединяю им stack1 обоих коммутаторов.
мастером выбирается cat3750G, а я хочу cat3750E (он новее и мощнее).
кабель переворачивали -не помогает.
Cat3570G#sh sw                                  Current
Switch#  Role      Mac Address     Priority     State
--------------------------------------------------------
1       Slave     0023.acd2.3200     1         Version Mismatch    
*2       Master    000f.2425.b400     1         Ready      
еще в логе cat3750G вот:
00:01:21: %STACKMGR-6-MASTER_READY: Master Switch 2 is READY
00:01:40: %STACKMGR-6-STACK_LINK_CHANGE: Stack Port 1 Switch 2 has changed to state UP
00:01:44: %STACKMGR-6-SWITCH_ADDED_VM: Switch 1 has been ADDED to the stack (VERSION_MISMATCH)
00:03:44: %IMAGEMGR-6-AUTO_COPY_SW_INITIATED: Auto-copy-software process initiated for switch number(s) 1
00:03:44: %IMAGEMGR-6-AUTO_COPY_SW:
00:03:44: %IMAGEMGR-6-AUTO_COPY_SW: Searching for stack member to act
00:03:44: %IMAGEMGR-6-AUTO_COPY_SW: as software donor...
00:03:44: %IMAGEMGR-6-AUTO_COPY_SW: Software was not copied
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW_INITIATED: Auto-advise-software process initiated for switch number(s) 1
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW:
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW:
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW: Systems with incompatible software have
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW: been added to the stack.  The storage
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW: devices on all of the stack members have
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW: been scanned, and the software required
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW: to make all stack members with each other
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW: was not found. The "archive download-sw"
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW: command can be used to install software
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW: off of the network from a tar file.
00:03:44: %IMAGEMGR-6-AUTO_ADVISE_SW:
на с3750G конфиг по дефолту.
на c3750E про stack одна сторока "switch 1 provision ws-c3750e-24td"
при подсоединении CON к с3750E вижу, что последний в ступоре

кстати, если соединяю c3750E(stack1) - c3750G(stack2), все равно выборы выигрывает c3750G :(
заранее благодарю....