stacking of 3 switches?

[vasanth77]

when stacking of 3 switches in row?what will happen for the end nodes(pc,workstation) connected to 2nd unit (switch) of a stack when its port or hardware fails?

what are the main advantage?

it will share power only or

unit1

unit2

unit3

[Joseph W. Doherty]

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

If you're referencing physically stacked switch members, which function as one logical switch, there's no advantage to single homed hosts, beyond you might be able to repatch such to another stack member or replace the failed stacked member with less effort (i.e. faster).

The principle advantage, for hosts, is when they have links to different stack members in a Etherchannel configuration.  With that, there's more bandwidth to/from host and host doesn't lose  connectivity if just one port or stack member fails.

Regarding power sharing, yes some physical stacks allow that too.

[vasanth77]

Etherchannel will be work like more link bundled between 2 switches.

so how a host will connect to  stack unit?

correct me ?

host with 2 NIC card ,NIC 1 is connected to stack unit-1(master) and NIC 2 is connected to stack member unit(UNIT 2).Is it possible?then what IP should i assign for both NIC card? same ip address or different?

[Joseph W. Doherty]

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

It depends on what your host supports.  Ideally, it will support LACP.  If not, again, it depends on what your host supports.  For example, some hosts (generally servers) can transmit on multiple ports, receive on only one, and failover from the active transmission port to another port.  Some hosts can active like a mini switch or bridge.  Unfortunately, to add to the confusion, different vendors sometimes call similar technologies with different names, and you also run into compatibility issues.