02-23-2015 08:10 AM - edited 03-07-2019 10:48 PM
Hi All,
I have 5 switches stacked and connected with stack power. I know you can only have 4 in a power stack so i was trying to create 2 stack profiles and put 3 switches in one power stack and 2 in the other.
I currently have the following -
sh stack-power
Power stack name: Power-2
Stack mode: Power sharing
Stack topology: Standalone
Switch 5:
Power budget: 685
Low port priority value: 22
High port priority value: 13
Switch priority value: 4
Port 1 status: Not connected
Port 2 status: Not connected
Neighbor on port 1: 0000.0000.0000
Neighbor on port 2: 0000.0000.0000
Power stack name: Powerstack-11
Stack mode: Power sharing
Stack topology: Ring
Switch 4:
Power budget: 280
Low port priority value: 20
High port priority value: 11
Switch priority value: 2
Port 1 status: Connected
Port 2 status: Shut
Neighbor on port 1: 0c68.0344.ea80
Neighbor on port 2: 0000.0000.0000
Switch 3:
Power budget: 280
Low port priority value: 19
High port priority value: 10
Switch priority value: 4
Port 1 status: Connected
Port 2 status: Connected
Neighbor on port 1: 547c.6964.7100
Neighbor on port 2: 0c68.0368.8580
Switch 2:
Power budget: 760
Low port priority value: 21
High port priority value: 12
Switch priority value: 3
Port 1 status: Connected
Port 2 status: Connected
Neighbor on port 1: 547c.6991.f780
Neighbor on port 2: 0c68.0344.ea80
Switch 1:
Power budget: 760
Low port priority value: 22
High port priority value: 13
Switch priority value: 1
Port 1 status: Shut
Port 2 status: Connected
Neighbor on port 1: 0000.0000.0000
Neighbor on port 2: 547c.6964.7100
I basically don't want to have one standalone switch. I tried the following below but didn't seem to achieve what i was after and I always seem to have one standalone switch. Does the physical cabling need to be amended as I have just followed the cisco doc when stacking the 5 together using stack power. For example Switch 1 Port 1 shows shut but when i enable this another one seems to shut on a different switch. Any ideas?
stack-power stack Power-1
stack-power switch 1
stack Power-1
stack-power switch 2
stack Power-1
stack-power stack Power-2
stack-power switch 3
stack Power-2
stack-power switch 4
stack Power-2
stack-power switch 5
stack Power-2
04-08-2015 12:48 AM
Hi
I am going to build a stack of 5 3850. Did you find examples on how to build such a stack ?
any best practices to share ? how did you cable them ?
difficult to find something when the stack is more than 4 switches.
thanks for your cooperation.
regards
04-08-2015 06:47 AM
Hi,
What I done was first of all was before building the stack or connecting any cables draw out what switch will be what member number and the priority.
I then configured this part on each of them individually ( for the numbering and priority commands).
When doing this, save the config and reboot.
Check the switch has the desired member number and priority using the show switch command then delete the old provisioning entry it has in the running config.
Commands to use at this stage are
switch x renumber x
switch x priority
Once happy, on the "master switch" provision the others via command line (again with switch not stacked at this point) e.g
switch 1 provision ws-c3850-48p
switch 2 provision ws-c3850-48p
switch 3 provision ws-c3850-48t
switch 4 provision ws-c3850-48t
switch 5 provision ws-c3850-24p
I'm assuming you have the same software major version on each switches at this stage. I recommend running them in Install Mode also.
For the cabling - I followed this pattern but just add an extra switch..same for power.
http://www.cisco.com/c/dam/en/us/td/i/300001-400000/330001-340000/334001-335000/334340.eps/_jcr_content/renditions/334340.jpg
Some links below that helped me with the stack build from start to finish were -
https://supportforums.cisco.com/discussion/11924636/3850-stack-ios-upgrade
https://supportforums.cisco.com/document/12067331/3850-switch-ios-xe-upgrade-detailed-standalone
For the power - this was a great help - as you might not even realise that the stack ports are in a shutdown state.
http://www.ccierants.com/2011/08/configuring-stack-power-what-they-dont.html
04-08-2015 08:00 AM
thanks for your time and guidance, it is appreciated.
And at the end, did you keep your 2 power-stack ( one with switch 1,2,3 and one with switch 4 and 5 ) ?
Regards.
David
04-08-2015 09:07 AM
Hi David,
I did try to achieve this but that was after I had everything powered up / plugged in and had left site. I now believe that for the stack groups - you need to plan the power stack cabling between the switches so they connect up relevant to how you want to share the power. I just connected the power cabling in the same design as the stackwise and then tried to do the power groups remotely but the results I am getting are very strange and not what I was expecting.
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: