Hi. I have an active-backup bonded connection on a 5.1.6 kernel where the slaves are an Ethernet interface and a wifi interface. The goal is to have network transparent (i.e. same and IP address on both interfaces) interface which takes advantage of high-speed and low-latency when it can be physically plugged into the wired network but have portability when unplugged through WiFi.
It all works, mostly. :-/
I find that even when the primary interface, being the Ethernet
interface is plugged in and active, the bonded interface will drop
packets periodically.
If I down the bonded interface and plumb the Ethernet interface
directly, not as a slave of the bonded interface, no such packet
dropping occurs.
My measure of packet dropping, is by observing the output of "sudo ping
-f <ip_address>. In less than a few minutes even, on the bonded
interface, even with the Ethernet interface as the active slave, I will
have a long string of dots indicating pings that were never
replied. On the unbonded Ethernet interface, no dots, even when
measured over many days.
My bonding config:
$ cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: enp0s31f6 (primary_reselect always)
Currently Active Slave: enp0s31f6
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: enp0s31f6
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 0c:54:15:4a:b2:0d
Slave queue ID: 0
Slave Interface: wlp2s0
MII Status: up
Speed: Unknown
Duplex: Unknown
Link Failure Count: 1
Permanent HW addr: 0c:54:15:4a:b2:0d
Slave queue ID: 0
Current interface config/stats:
$ ifconfig bond0
bond0: flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST> mtu 1500
inet 10.75.22.245 netmask 255.255.255.0 broadcast 10.75.22.255
inet6 fe80::ee66:b8c9:d55:a28f prefixlen 64 scopeid 0x20<link>
inet6 2001:123:ab:123:d36d:5e5d:acc8:e9bc prefixlen 64 scopeid
0x0<global>
ether 0c:54:15:4a:b2:0d txqueuelen 1000 (Ethernet)
RX packets 1596206 bytes 165221404 (157.5 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1590552 bytes 162689350 (155.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Devices:
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (2) I219-LM
(rev 31)
02:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
Happy to provide any other useful information.
Any ideas why the dropping, only when using the bonded interface?
Cheers,
b.
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