Arch Linux

Moviuro

Member

Registered: 2012-06-03

Posts: 68

WiFi interface in bond receiving packets when primary is connected

Hi,

In addition to my previous issue with bonds, my two archlinux machines are experiencing the same unexpected behavior: packet loss when pinging from my router to the archlinux boxes.

mode -> active-backup or 1

Active-backup policy: Only one slave in the bond is active. A different slave becomes active if, and only if, the active slave fails. The bond's MAC address is externally visible on only one port (network adapter) to avoid confusing the switch. [...]

root@toxoplasmosis / # ip a
4: enp4s0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master bond0 state UP group default qlen 1000
    link/ether 8a:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff permaddr 70:...
5: wlp5s0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc noqueue master bond0 state UP group default qlen 1000
    link/ether 8a:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff permaddr 34:...
7: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 8a:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.111/24 metric 1024 brd 192.168.1.255 scope global dynamic bond0
       valid_lft 25777sec preferred_lft 25777sec
    [ipv6 setup... NYOB]

I unplug then plug my ethernet cable back in, wait a few minutes.

Ethernet Channel Bonding Driver: v6.2.11-1-clear

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: enp4s0 (primary_reselect always)
Currently Active Slave: enp4s0
MII Status: up  
MII Polling Interval (ms): 100 
Up Delay (ms): 0
Down Delay (ms): 0
Peer Notification Delay (ms): 0

[...]

root@toxoplasmosis / # tcpdump -nei wlp5s0 icmp # should be empty, right?
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on wlp5s0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
11:10:02.926061 98:xx:xx:xx:xx:xx > 8a:yy:yy:yy:yy:yy, ethertype IPv4 (0x0800), length 66: 185.XX.XX.XX.443 > 192.168.1.111.39328: Flags [.], ack 9215, win 503, options [nop,nop,TS val 3124802758 ecr 4247132757], length 0 # HTTPS traffic I guess?
11:10:02.926480 98:xx:xx:xx:xx:xx > 8a:yy:yy:yy:yy:yy, ethertype IPv4 (0x0800), length 570: AA.AA.AA.AA.51820 > 192.168.1.111.60927: UDP, length 528 # Wireguard VPN
11:10:04.635794 98:xx:xx:xx:xx:xx > 8a:yy:yy:yy:yy:yy, ethertype IPv4 (0x0800), length 330: AA.AA.AA.AA.51820 > 192.168.1.111.60927: UDP, length 288
11:10:10.946487 d0:xx:xx:xx:xx:xx > 8a:yy:yy:yy:yy:yy, ethertype IPv4 (0x0800), length 70: 192.168.1.21.42123 > 192.168.1.111.3478: UDP, length 28 # Ubiquiti devices at home connecting to the aur/unifi software
[...]
11:14:05.489611 98:xx:xx:xx:xx > 8a:yy:yy:yy:yy, ethertype IPv4 (0x0800), length 98: 192.168.1.1 > 192.168.1.111: ICMP echo request, id 15601, seq 923, length 64 # lost (?) ping from router to my machine

My home network works as follows:

192.168.1/24
router .1 --- USW-24-PoE .30 --- U6 Lite .21 (WAP)
                   \ 1Gbps eth        / WiFi6 chan40
                    ` my machine .111 

What would cause this issue and how can I fix it?

---

bspwm, BTRFS over LUKS
Archlinux a lot, FreeBSD more and more...
Murphy's rule: The day you need a backup, you tell yourself you should have created some.