![]() ![]() If the parent does not detect the radar, it remains on the channel and is not visible for the MAP that did detect it. ![]() The previous channel is marked as not usable for 30 minutes. Then, the MAP starts to scan channels for a suitable new parent to associate again to the mesh network. If a mesh access point (MAP) sees the radar on the current channel, it goes silent for one minute. This depends on where the radar is detected and on the state of “full sector DFS mode” configuration setting (in case it is disabled): ![]() The effects of radar signal over a wireless mesh network with 802.11a backhaul can be different. This is dictated by Federal Communications Commission (FCC) and European Telecommunications Standards Institute (ETSI) standards, and is established to allow the sharing of the 5 GHz spectrum between wireless LAN (WLAN) and military or weather radars that use the same frequencies. If during operation, an access point (AP) detects a radar event over the Radio Frequency (RF) channel that the network backhaul uses, it must immediately change to another available RF channel. It is important to validate the presence of radar on any wireless mesh deployment. The objective is to provide a mechanism to check for possible radar signals that can affect a wireless mesh network that uses 802.11a as backhaul links. It covers both 15 mesh access point families. One based on 4.0.217.200 image, the other using newer functionality on the mesh released, in particular 4.1.192.17M. This document offers two methods to scan for radar signals across 802.11a outdoor channels before deployment of mesh networks. ![]()
0 Comments
Leave a Reply. |