I am trying to troublshoot an issue.
I have an IBM notbook attached to a 1242AG AP on WLC1.
I have a Cisco 7925G phone connected to the same AP. Both devices are next to each other.
Both connected to different WLANs, Data and voice respectivley.
Data runs G only.
Voice runs A only.
No rates below 12Mbps are enabled.
Is it normal to see the phone with a much worse RSSI and SNR than the data device because of the high freq?
(thus noise is -98)
(thus noise is -93)
I can see from this, that the noise is OK, but RSSI is the problem.
Also, can anyone tell me how often when you do a show client detail <mac>, these values update? Is it every 5 minutes? Is it configurable?
Many thx indeed,
Given that the phone is on 802.11a, the results you show are not unexpected. 802.11a does not propagate as far as 802.11g (assuming the same EIRP and radiation pattern for both radios at the AP). What other AP's do you have using 802.11a on the same channel? That could also be part of your noise problem.
Are you getting RSSI values from the CLI, or from the devices? There is no standard for calculating RSSI, so comparing the RSSI reported by different devices is not apples-to-apples. Comparing it at the controller might be OK, but I don't know if the controller is reporting an RSSI that it calculates, or if it simply displays what it is receiving from the devices. I believe the controller is simply displaying what RSSI value the ap receives from the devices, so using "show client detail" from the CLI would also not be apples-to-apples when comparing two different devices.
Also - the laptop probably has a better antenna (probably actually two antennas in the display panel) than the 7925 has.