how to create redundancy for stack switch?

[rrairineo1]

Hi all, 

I have this setup (the first picture) and i want to introduce redundancy (I am a just starting to gain experience on networking) because whenever one of the stack switches fails, failure of some services are experienced. So in order for it not to occur again, i think there should be a way to avoid link failure and i thought of doing a redundancy but i'm not sure if this works. (please refer to attached file). I have thought of two (please see attached file) and comment if i did it right or what should i do to improve it.  I will be very glad to receive responses from anyone. thanks and best regards..   

also, based on the last one with hsrp, i consider my first (2) stack as my core right? and the other (2) stack as my alternative core? is this ok? need to be enlightened on this one. sorry i am just new to this designing thing. 

[Prabath Godevithanage]

first one is neat and for access switches you can create an ether channel between access and your stack switches.So from one access switch you'll have one link to one switch in the stack and the other link to the other switch in the stack and configure them as ether channels at both ends.

you want to dig up bit and get familiar with ether channels,stack wise and HSRP,here is a good link to start

[rrairineo1]

hi preranda78 thank you for your response. thank you for suggestions. I have included the one you suggested (access switch one link each for both stack switch and configured them as etherchannel) on the first one. how about the second one what can you say about it? is that setup ok? can i consider the first 2 stack switch as my core and the other two as my alternative core? is this ok? thank you again.

[Prabath Godevithanage]

Well you can repeat what you did on the first access on the second one as well,simply you can consider your 3750 as your core/distribution layer and the access switches as the access layer where all your client devices would connect. I just realised that I only commented about your switching side..you have quite a few routers there..generally in a simple design like this you would only need one router and then the firewall in the front of it or firewall/router..

Its all depend on your requirements.take a look at pre validated design section to get some ideas as well

[rrairineo1]

yes indeed have 4-5 routers and firewalls to connect to from my stack switch. what can be more suitable redundancy i can use in this type of setup can you advice me? thanks.