WiFi connection flicker

■概要

稀にWiFiのコネクションが1分程度ダウンする場合がある。

調査してみた。

■無線のコネクションがダウンしない時

APのIP :

APのログ:

Oct 12 00:00:22 [SYSTEM]: WLAN[2.4G],AutoChannel change to 7

Oct 12 00:00:02 [SYSTEM]: WLAN[2.4G], Channel = AutoSelect

Oct 12 00:00:02 [SYSTEM]: WLAN[2.4G], CountryRegion = 0

Oct 12 00:00:02 [SYSTEM]: SCHEDULE, LED Off

Oct 11 23:59:21 [SYSTEM]: WLAN[2.4G],AutoChannel change to 7

Oct 11 23:59:01 [SYSTEM]: WLAN[2.4G], Channel = AutoSelect

Oct 11 23:59:01 [SYSTEM]: WLAN[2.4G], CountryRegion = 0

Oct 11 23:59:01 [SYSTEM]: SCHEDULE, LED On

■無線のコネクションがダウンする時

APのIP:

APのログ:

Oct 12 01:19:51 [SYSTEM]: HTTP, start

Oct 12 01:19:51 [SYSTEM]: HTTP, Stopping

Oct 12 01:19:25 [SYSTEM]: WLAN[2.4G],AutoChannel change to 7

Oct 12 01:19:23 [SYSTEM]: DDNS, update.iobb.net says that your IP address has not changed since the last update

Oct 12 01:19:23 [SYSTEM]: DDNS, ez-ipupdate started for interface br0 host xxx.iobb.net using server update.iobb.net and service iobb

Oct 12 01:19:11 [SYSTEM]: WLAN[5G],AutoChannel change to 44

Oct 12 01:19:07 [SYSTEM]: WLAN[5G],Available Channel: [36, 40, 44, 48]

Oct 12 01:19:04 [SYSTEM]: WLAN[2.4G], Channel = AutoSelect

Oct 12 01:19:04 [SYSTEM]: WLAN[2.4G], CountryRegion = 0

Oct 12 01:19:04 [SYSTEM]: SCHEDULE, LED Off

Oct 12 01:19:04 [SYSTEM]: WLAN[2.4G], Channel = AutoSelect

Oct 12 01:19:04 [SYSTEM]: WLAN[2.4G], CountryRegion = 0

Oct 12 01:19:04 [SYSTEM]: SCHEDULE, LED On

Oct 12 01:19:04 [SYSTEM]: NTP, Local time=2014/10/12 01:19:04

Oct 12 01:19:04 [SYSTEM]: NTP, Daylight saving status: Disable

Oct 12 01:19:04 [SYSTEM]: NTP, Time zone = +9.0 Osaka, Sapporo, Tokyo

Oct 12 01:19:02 [SYSTEM]: HTTP, start

Oct 12 01:19:02 [SYSTEM]: HTTP, Stopping

Oct 12 01:19:02 [SYSTEM]: NTP, start NTP Client

Oct 12 01:19:02 [SYSTEM]: WLAN[2.4G], Channel = AutoSelect

Oct 12 01:19:02 [SYSTEM]: WLAN[2.4G], CountryRegion = 0

Oct 12 01:19:02 [SYSTEM]: WLAN[5G], Channel = AutoSelect

Oct 12 01:19:02 [SYSTEM]: WLAN[5G], CountryRegion = 0

Oct 12 01:19:01 [SYSTEM]: WAN, stop Hardware NAT

Oct 12 01:19:01 [SYSTEM]: NET, Firewall Disabled

Oct 12 01:19:01 [SYSTEM]: NET, NAT Disabled

Oct 12 01:19:00 [SYSTEM]: NET, stop Firewall

Oct 12 01:19:00 [SYSTEM]: NET, stop NAT

Oct 12 01:19:00 [SYSTEM]: LAN, New IP = 192.168.0.100

Oct 12 01:19:00 [SYSTEM]: WLAN, start LLTD

Oct 12 01:18:59 [SYSTEM]: WLAN, LLTD Stopping

Oct 12 01:18:59 [SYSTEM]: HTTP, start

Oct 12 01:18:59 [SYSTEM]: HTTP, Stopping

Oct 12 01:18:59 [SYSTEM]: NET, Firewall Disabled

Oct 12 01:18:59 [SYSTEM]: NET, NAT Disabled

Oct 12 01:18:59 [SYSTEM]: NET, stop Firewall

Oct 12 01:18:59 [SYSTEM]: NET, stop NAT

Oct 12 01:18:59 [SYSTEM]: NTP, start NTP Client

Oct 12 01:18:58 [SYSTEM]: WLAN[2.4G], Channel = AutoSelect

Oct 12 01:18:58 [SYSTEM]: WLAN[2.4G], CountryRegion = 0

Oct 12 01:18:58 [SYSTEM]: WLAN[5G], Channel = AutoSelect

Oct 12 01:18:58 [SYSTEM]: WLAN[5G], CountryRegion = 0

Oct 12 01:18:56 [SYSTEM]: WAN, stop Hardware NAT

Oct 12 01:18:55 [SYSTEM]: LAN, start

Oct 12 01:18:55 [SYSTEM]: LAN, Stopping

やはり、DHCPの設定を変えると事象が発生するようになった。

この時、何が起きているのか？

■ルータのDHCPの状況

ルータのリース時間の更新時刻だった。