New Xiaomi router AC2100

For Developers
1503

This topic was intended for adding support for this specific device.
Since official 21.02.0 images are available now, I will set a timer for this topic to close.

Why?

Because specific problems for this device with official releases are better handled in separate topics, in order to make finding relevant information easier. Who is going to read the previous 1400-something postings, if he has a specific problem with 21.02.0 and wifi?

Therefore: Please open new topics for any open issues with this device.

Thanks! :slight_smile:

6 Likes
1504

I found my configuration problem in 21.02.0.

  • All my wired connections did not have internet.
  • All wireless connections had internet.
    I forgot to indicate the gateway in the LAN interface.

But I did not understand why in wifi the internet connection worked ...
My provider modem is 192.168.1.1.
My AC2100 is 192.168.1.10 client AND DHCP server for all 192.168.2.x interfaces

1505

that's interesting, would you share your configuration, so I could check for differences?

1506

Mine is in dumb AP mode.

/etc/config/network


config interface 'loopback'
	option device 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config globals 'globals'
	option packet_steering '1'
	option ula_prefix 'fdb5:7095:d7f2::/48'

config device
	option name 'br-lan'
	option type 'bridge'
	list ports 'lan1'
	list ports 'lan2'
	list ports 'lan3'
	list ports 'wan'

config interface 'lan'
	option device 'br-lan'
	option proto 'static'
	option ipaddr '192.168.100.106'
	option netmask '255.255.255.0'
	option ip6assign '60'
	option gateway '192.168.100.1'
	list dns '192.168.100.1'
	option broadcast '192.168.100.255'

config interface 'lan6'
	option proto 'dhcpv6'
	option reqprefix 'no'
	option device '@lan'

/etc/config/wireless

config wifi-device 'radio0'
	option type 'mac80211'
	option channel '11'
	option hwmode '11g'
	option path '1e140000.pcie/pci0000:00/0000:00:01.0/0000:02:00.0'
	option htmode 'HT20'
	option cell_density '0'

config wifi-iface 'default_radio0'
	option device 'radio0'
	option network 'lan'
	option mode 'ap'
	option ssid 'User'
	option encryption 'psk2'
	option key 'password'

config wifi-device 'radio1'
	option type 'mac80211'
	option channel '36'
	option hwmode '11a'
	option path '1e140000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0'
	option htmode 'VHT80'
	option cell_density '0'

config wifi-iface 'default_radio1'
	option device 'radio1'
	option network 'lan'
	option mode 'ap'
	option ssid 'User5g'
	option encryption 'psk2'
	option key 'password'
1507

Did anyone notice worse 5ghz performance in 21.02 release compared to scp07s' 19.07 builds?
Transfer speeds from router to client are reduced to ~300 mbit from ~480 mbit on 19.07. Client to router seem to be fine.

1508

Do 21.0x.x official images fix random wifi disconnections for everyone here?
Every day or two, WAN is still connected but no packets seem to pass through it, not even to connect to LuCI and restart it remotely, I have to manually unplug and replug the router.

I'm wondering if this stable improves it compared to OpenWrt 19.07.4 r11208-ce6496d796 I'm currently in.

1509

I had some stability and range problems with wifi in 21.02 as reported. The range wasn't the main issue, it was the stability. I can retry with master if there are reports of improvements (can't be messing with my main router all the time ).

1510

This topic was automatically closed 2 days after the last reply. New replies are no longer allowed.

1512

Hey guys, looking at picking up one of these routers pretty soon. How has anyone found the long term stability? Any issues to report? Also how has 5Ghz Wi-Fi performance been?

1513

Hello @stephendt,
I have been using the Redmi AC2100 for a couple of months now, running OpenWRT 21.02.1. The Wifi is very stable on both 2.4 as well as 5 GHz. No issues so far.

1 Like
1514

That's awesome to hear. Look forward to trying it out.

1515

I find that I can't use 160MHz width on 5GHz because WiFi-speeds drop to a quarter of what they should be, even if it's on an entirely empty channel. At 80MHz I get around 500Mbps. Otherwise the router works fine, but it's kind of a bummer not being able to use 160MHz width with devices that can make use of it.

1516

This is an AC device, I didn't think they could do 160mhz channels? I thought this was an AX feature. Unless I am mistaken?

1517

You can use 160MHz-channels with 802.11ac.

1518

After more investigation, you are indeed correct, but sadly this is not permitted in my region :slight_smile:

What region are you in? I think there may be some issues with it spanning accross DFS channels.

1519

Finland.

I wouldn't know. It's the only 160MHz capable router I've ever had.

1520

Ah, yes I believe that Europen Wi-Fi channels have some power / DFS restrictions here, and when you're doing 160mhz channels it probably has a bit of a fit, depending on the channel. I'm no expert though.

1521

Question for anyone using this router - is it possible to increase the power of Ch149 5Ghz to 30dbm, or is 26dbm the max for this router? I have an Archer C7 that can do 30dbm and I am wondering if this is a hardware or firmware limitation. My region (Australia) permits this.

1522

Hello.

i'm using white AC2100 with scp07 19.07.7 build and want to upgrade to 21.02.3.

can i just backup , sysupgrade to 21.02.3 then restore ?

best regards