Meraki

80211WiGuy · ‎Jan 29 2020

Thanks, 95 stuck in my mind as something familiar. -95dBm is the starting point for the RX-SOP slider in an RF Profile. I'm guessing -95dBm is also Meraki's min receive sensitivity.

80211WiGuy · ‎Jan 14 2019

I'm with you, not sure either. I just did a test and "Any" seems to include ICMP as it's allowing it on explicit allows but denying it on my 10.0.0.0/8 deny. I think I might have gotten mixed up on my original statement, I thought ICMP TTL Exceeded was coming back from the transit links but it seems to have stopped now. I must have made a mistake my original ACL.

80211WiGuy · ‎Jan 14 2019

My drop down list only offers TCP, UDP, ANY (ICMP is not listed)

80211WiGuy · ‎Jan 14 2019

Thank you, I totally forgot about that! Am I right to assume that the ACLs only work against TCP/UDP and not ICMP or other L4 protocols? Also, I was trying to prevent IPv6 on the network but IPv4 stopped working when I tried a "Deny IPv6 any any any any" rule. Is this something I should dig into with TAC?

80211WiGuy · ‎Jan 14 2019

Soooo while trying to restrict all clients on my campus network to access for the internet only, I did something dangerous and created an ACL that should have broken OSPF Routing on my network. Deny IPv4 Any 10.0.0.0/8 Any 10.0.0.0/8 Any Any In theory, this should block all private addresses (I'm only using 10.0.0.0/8) from talking to each other across VLANs. But then I realised, my transit links should have stopped being able to send/receive OSPF hello messages due to this, but they're still up. In addition, clients are still able to see each hop along a traceroute. In theory the ICMP TTL Exceeded messages should have been dropped also. Are there some additional nuances to how ACLs work which might not have been documented?

80211WiGuy · ‎Aug 13 2018

Could be mounting height and/or heat. Heat actually raises the RF noise floor in 2.4 and 5GHz, the AP might be rated to operate at higher temps, but no AP can operate well at high temps - it turns into an RF physics problem. The long dipole type antennas commonly used on outdoor APs typically squish the signal into a flatter pancake than most. Outdoor APs are also commonly placed too high for their attached antennas. Its possible that your AP may be high up enough that your missing the main coverage lobe from the antenna, giving the birds great signal but not the users down below.

80211WiGuy · ‎Aug 13 2018

I think RX-SOP actively drops connected clients at the the set threshold and will still back off the channel if energy detect is triggered. It's more useful for high density environments and forces clients to move to the next available AP. I don't think it will improve this situation.

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Re: Measuring Signal Strength: RSSI and dbm

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