Hi. I’m trying to set up wireless repeater between RB751U-2HnD and RB751G-2HnD.
I have used the “setup repeater” button in wireless settings. All is fine, I can connect to repeater. I test like this:
PC1–cable–MIKROTIK1–wifi–MIKROTIK2–wifi–PC2
Both mikrotiks are running v6.38.3, but I had the same situation with 6.35. PC2 is using 802.11N with 2 streams and 40mhz channel.
The problem: using iperf and downloading on PC2 I get occasional dropouts. Here is the picture from MIKROTIK1:
They are not periodic, but they usually last ~5sec.
The funny thing is that if PC2 is connected to MIKROTIK1 (i.e. not using repeater), I get the same picture. And if I look at MIKROTIK2 at the same time, I see some minor “broadcast” traffic going on at ~100kbps, and that traffic is also interrupted at the same time when dropouts happen. It seems that MIKROTIK2 in repeater mode is causing some interference.
If I turn off MIKROTIK2, I get nice constant traffic:
I have tested some smartphones instead of PC2, the result is the same.
MIKROTIK1 config:
/interface wireless> print
Flags: X - disabled, R - running
0 R name="wlan1" mtu=1500 l2mtu=1600 mac-address=D4:CA:6D:6A:6C:D1 arp=enabled interface-type=Atheros AR92xx mode=ap-bridge ssid="net2" frequency=2437 band=2ghz-b/g/n channel-width=20/40mhz-eC
scan-list=default wireless-protocol=802.11 antenna-mode=ant-a vlan-mode=no-tag vlan-id=1 wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no bridge-mode=enabled default-authentication=yes
default-forwarding=yes default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no security-profile=default compression=no
MIKROTIK2 config:
[admin@MikroTik] > interface wireless print
Flags: X - disabled, R - running
0 R name="wlan1" mtu=1500 l2mtu=1600 mac-address=D4:CA:6D:68:80:65 arp=enabled interface-type=Atheros AR92xx mode=station-bridge
ssid="net2" frequency=2437 band=2ghz-b/g/n channel-width=20/40mhz-eC scan-list=default wireless-protocol=any
antenna-mode=ant-a vlan-mode=no-tag vlan-id=1 wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no bridge-mode=enabled
default-authentication=yes default-forwarding=yes default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no
security-profile=wlan1-net2-repeater compression=no
1 name="wlan2" mtu=1500 l2mtu=1600 mac-address=D6:CA:6D:68:80:65 arp=enabled interface-type=virtual master-interface=wlan1
mode=ap-bridge ssid="net3" vlan-mode=no-tag vlan-id=1 wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no
bridge-mode=enabled default-authentication=yes default-forwarding=yes default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no
security-profile=wlan1-net2-repeater
I have enabled debug wireless logs on both devices, but there is nothing logged during dropouts.
EDIT: both mikrotiks are set to 17dbm. I tried to lower mikrotik2 to 8dbm, but did not help. Routers are separated by ~10m, two concrete walls.