Hello everyone, first post here.
I have several 5508 WLAN controllers with nearly 1000 connected Cisco 3602i and 3702i APs. These APs are being powered by Juniper EX3300 and EX2200 switches.
Software Versions:
Juniper - Issue experienced while running 12.3R6.6, 12.3R9.4, 12.3R10.2, 13.2X50-D15.3, 14.1X53-D26.2
Cisco 5508 - Running 7.6.110.0 (we have an update to 8.1 scheduled)
The first problem that I'm seeing is that the APs don't appear to be drawing enough power from my switches. I'm using 3702i APs in my test setup, but the 3602i APs are exhibiting similar behavior. This can also be replicated on Juniper EX2200 switches.
See the below output of "show poe interface" command on my test EX3300 with nothing but two 3702i APs connected to it:
This is the same power draw that I am seeing on all 3702i APs on all Juniper EX3300/2200 switches.
In the above screenshot, note that:
- ge-0/0/0 is a 3702i with no module installed
- ge-0/0/1 is a 3702i with a WSSI module installed
- CDP is disabled and we are using LLDP for power negotiation (as Juniper doesn't support CDP)
- Manually setting Maximum power to 30 Watts produces the same power draw results.
It is my understanding that a fully functional 3702i should be drawing at least:
- 16.8 Watts with no module
- 18 Watts with module
The second problem that I'm seeing is that the Cisco 5508 is not showing me the power draw of the APs like I have seen in some screenshots from other posts. I'm guessing this issue is related to the outdated firmware on the 5508 controller.
This is what I'm seeing:
This is what I should be seeing:
So my questions are as follows:
1) Are there any troubleshooting steps that can be taken on the controller or APs (software version upgrade to 8.1 aside)? I'd be happy to provide a packet capture or console output from one of the 3702i APs if that would help in diagnosing this.
2) I can see that the APs are drawing 6.2 to 8.6 Watts on the switch. How can I see if they are disabling radios due to low power (ie, running in 4x4:3 or 3x3:3 MIMO)?
And before anyone says it, yes I realize that this could be a Juniper issue. I will be pursuing it with them as well. My hope is that ya'll can help me at least with troubleshooting Cisco side of things.
