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Hi, 
 
I am in the process of setting up Cisco 3850-24T-S and 3850XS-S, I'm trying to stack them together but its taken so long time to boot!.................console cable is in and its currently stuck at: 
 
%STACKMGR-1-STACK_LINK_CHANGE: Stack port 1 on switch 2 is up 
 
When it does get past the above I see this: 
 
sysmgr_death_reason_failure_signal 
 
and the switches just loop....... 
 
If I remove the stack cables and reboot the switches they both boot perfectly fine as standalone switches, as soon as I try and stack them the switches reboots and just does the above. 
 
Firmware installed on switches 
 
WS-C3850-24XS &nbsp; &nbsp; 03.07.04E &nbsp; &nbsp; &nbsp; &nbsp; cat3k_caa-universalk9 
WS-C3850-24T &nbsp; &nbsp; &nbsp; 03.07.03E &nbsp; &nbsp; &nbsp; &nbsp; cat3k_caa-universalk9
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Hi,

I am in the process of setting up Cisco 3850-24T-S and 3850XS-S, I'm trying to stack them together but its taken so long time to boot!.................console cable is in and its currently stuck at:

%STACKMGR-1-STACK_LINK_CHANGE: Stack port 1 on switch 2 is up

When it does get past the above I see this:

sysmgr_death_reason_failure_signal

and the switches just loop.......

If I remove the stack cables and reboot the switches they both boot perfectly fine as standalone switches, as soon as I try and stack them the switches reboots and just does the above.

Firmware installed on switches

WS-C3850-24XS     03.07.04E         cat3k_caa-universalk9
WS-C3850-24T       03.07.03E         cat3k_caa-universalk9

Cisco 3850-24T-S and 3850XS-S Stacking

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).