Cisco 2960x Flex Stack Plus Question

Dear All,

Please bare with me as I am new to the Cisco Stacking technology. Currently we have two Cisco 2960x switches installed linked with a Flex Stack Plus cable and technology forming a logical Unit. Two uplink cables connecting to the uplink core switch. We are going to install one more 2960x switch and join the Stackable group with 3 Stackable swithes. Assuming that there is only "One VLan" across all 3 switches (Switch 1, switch 2 and switch 3 from top to bottom).

Question 1 : Since we only have two uplinks cables to the upstream core switch, if we connect a Server to the physical switch 3 that has No uplink cable connected, will there be any network signal coming from the upstream core switch ?

Question 2 : Assume we have configured Channel Group to the Cisco 2960x ports, if we plug in two cable from a HP server to Switch 1 /Switch 2, Switch 2/Switch 3 or Switch 1/Switch 3. If disaster occur and either Switch 1, Swith 2 or Switch 3 is down will there be any resilience exist on this design.

Appreciate your kind support and comments in advance.

Patrick (HKGovt IT Dept)

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Garry GlendownConsulting and Network/Security SpecialistCommented:
1) of course, the whole stack is one logical switch, even if you only have one connection, the L2 is available across all of the switches. Generally, there's two main reasons for connecting multiple links in a channel: one, provide increased bandwidth, and two, ensure redundancy.

2) yes, if the server acts correctly. Channel-protocols like LACP will take care that if either the remote end isn't part of the channel, or one link goes down, the remaining link(s) will keep on operating just fine.

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patricktamAuthor Commented:
Thank you for your prompt answer. Appreciate it.
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