Hot answers tagged

9

It definitely matters: 'Omni' refers to the symmetry in the plane perpendicular to the axis of the antenna; That is, the torus around the antenna axis. But 'omni' antennas are VERY sensitive to variation from the vertical. If you're aiming down into an open area (to the left, as suggested by the photo,) then ok, tip them as is shown. But generally, you ...


8

This is how you would set up dual-band 2.4Ghz / 5Ghz on a Cisco autonomous AP for Open auth... Basically just associate the SSID with Dot11Radio0 and Dot11Radio1; Substitute these WPA PSK configs if you want WPA PSK. I can add PEAP or other EAP methods after I get home, but I haven't got access to my EAP notes right now. ! version 15.2 no service pad ...


5

Many Cisco devices include the fsck command to check the file system with. If you run this command on the flash, it will attempt to fix file system errors for you. These were my results: ap#fsck flash: Fsck operation may take a while. Continue? [confirm] flashfs[3]: WARNING - Unable to allocate backup blocks. Please free some space on the flash file system. ...


5

We solved this with new cable runs using STP instead of UTP. No more issues with POE to the APs. First time we've needed STP and we can't find anything that would cause the interference with the run.


5

Yes, it would be beneficial if you are angling the AP correctly (second AP would be up and to the right), even with the antennas on the other AP being vertical. If you angle this the wrong way (second AP is up and to the left), then you will be making things worse. This type of antenna produces a signal pattern in a toroid or doughnut shape (with the ...


3

I have to disagree with TAC on this one. Running those low speeds is really not a good idea. I wouldn't run anything lower than 12 unless you absolutely need 11b. If you have interference, the only way you're going to find it is with some sort of sniffer or spectrum analyzer. Maybe you can borrow one? Try turning off your WLAN and see what other wifi ...


3

I cannot tell you exactly what is happening without looking at the configs of the Switches and the WLC you have as I can think of a number of possibilities. For me, it'd be helpful to have that information but more so, the things that you've done. Basically, what are the items you've tried thus far? SW-A: 10.133.55.1 <---TRUNK---> SW-B: 10.133.55.2 WLC-...


3

This will theoretically help. Your question seems to break down to: "Does it make sense to aim omnidirectional antennas?" Since 'omnidirectional' dipoles are actually directional with a toroidal radiation pattern, the radiation from your angled antennas will be strongest along the plane perpendicular to the antenna. The fact that the other antenna is ...


3

I see you put the tag of aironet, so that I assume you are using Cisco WLC. I used to manage this kind of WLC HA and I can be sure that both WLCs share the same IP address (here is 1.1.1.1) as long as you configured them properly. Cisco also states this in their Cisco WLC Configuration Guide: Information About High Availability ... The ...


2

Here is what I have gleaned from the Cisco support pages. Status 71: Reset to update radio status on WLC. Also usually done upon AP joining the WLC after boot up. Cisco Support Community - %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to down


2

As Ricky Beam answered in the comments, this appears to be a bug with firmware c1140-k9w7-mx.153-3.JBB1 and is resolved in at least firmware c1140-k9w7-mx.153-3.JC. The other issue I was experiencing with watchdog timeouts appear to be caused by a hardware failure.


2

It sounds like you've done all the right things: Move to 5 GHz where clients allow Disable slow speeds Limit xmit power The basic problem is you're working in a crowded RF environment and there's not a lot you can do. It's rush hour on the freeway, and no matter how powerful a car you have, you can only go as fast as the flow of traffic. Until you can ...


2

Without knowing what model the switches are, what is the default MTU on the interfaces? Often they default to 1500, and with the addition of the vlan tag you may be surpassing that. This could certainly manifest itself in the manner you described. A ping from one of the clients at increasing packet sizes will tell you (it would likely last reply at 1496). ...


2

Have you considered placing your wlc in a different location instead of off of the router in the router. From most of my experience with environments I've worked in we have always placed are wireless LAN controllers off of switches. Spaced evenly throughout your network environment comma it would make much more sense from a traffic flow standpoint. It seems ...


2

If the AP is trying to do a discovery of a controller, then it is NOT an autonomous access point.


1

The redundancy management address is only pingable if the controller is configured in SSO mode.


1

If you want to do a quick and dirty hack, just loop back the VLANs into each other on a switch. Just add two untagged/access ports in VLAN10, and one for VLAN20 and VLAN30, and just patch the ports together. Very ugly, extremely sketchy, but it will work as long as you don't have Spanning Tree enabled (and it will work even then if you put BPDU filtering ...


1

EDIT: As per Ron's comment, if you can't get the licensed IOS from Cisco than you don't have the correct licensing required to upgrade.


1

Try: broadcast-key vlan 1 change 60 for each of the vlans. (Seen here: http://www.blueboxmoon.com/wordpress/?p=832). I've got similar issues also with cisco access points in standalone mode. Update: With: Cisco IOS Software, C3500 Software (AP3G1-K9W7-M), Version 15.3(3)JAB, RELEASE SOFTWARE (fc1) Things seem to be much better. I also have: dot11 ...


1

Try changing the operator in the freeradius config to "=~" : ospite-5vh Cisco-AVPair =~ "ssid=Interactive_Ospiti"


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