Date: Tue, 07 Dec 2021 06:29:01 +0000
From: bugzilla-noreply@freebsd.org
To: bugs@FreeBSD.org
Subject: [Bug 260260] igb(4) I35{0,4} parrent <--> vlan jumbo frame mtu mismatch
Message-ID: <bug-260260-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D260260 Bug ID: 260260 Summary: igb(4) I35{0,4} parrent <--> vlan jumbo frame mtu mismatch Product: Base System Version: 13.0-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: zarychtam@plan-b.pwste.edu.pl The vlan(4) children of LACP lagg(4) consistent of two ibg(4) I350 or I354 = have to use reduced MTU size to work. To reproduce: ifconfig_igb0=3D"mtu 9000 up" ifconfig_igb1=3D"mtu 9000 up" ifconfig_lagg0=3D"laggproto lacp laggport igb0 laggport igb1 -lacp_strict" vlans_lagg0=3D"vlan0 vlan1 ..." ifconfig_vlan0=3D"inet x.x.x.x/y" # iperf3 -R -c y.y.y.y Connecting to host y.y.y.y, port 5201 Reverse mode, remote host y.y.y.y is sending [ 5] local x.x.x.x port 52750 connected to y.y.y.y port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.02 sec 0.00 Bytes 0.00 bits/sec [ 5] 1.02-2.02 sec 0.00 Bytes 0.00 bits/sec [ 5] 2.02-3.02 sec 0.00 Bytes 0.00 bits/sec [ 5] 3.02-3.55 sec 0.00 Bytes 0.00 bits/sec #ifconfig vlan0 mtu 8996 # iperf3 -R -c y.y.y.y Connecting to host y.y.y.y, port 5201 Reverse mode, remote host y.y.y.y is sending [ 5] local x.x.x.x port 49056 connected to y.y.y.y port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 118 MBytes 989 Mbits/sec [ 5] 1.00-2.00 sec 118 MBytes 990 Mbits/sec [ 5] 2.00-3.00 sec 118 MBytes 990 Mbits/sec [ 5] 3.00-3.69 sec 81.8 MBytes 989 Mbits/sec There is no problem with sending jumbo frames, only receiving them is broke= n. It is not hardware limitation, since bumping MTU on parents also solves the issue and the configuration below is working fine: ifconfig_igb0=3D"mtu 9004 up" ifconfig_igb1=3D"mtu 9004 up" ifconfig_lagg0=3D"laggproto lacp laggport igb0 laggport igb1 -lacp_strict" vlans_lagg0=3D"vlan0 vlan1 ..." ifconfig_vlan0=3D"inet x.x.x.x/y mtu 9000" The issue looks like either ibg(4) or maybe only I35{0,4} specific. I have = more machines with em(4) running similar setups, but only a few of them, those w= ith ibg(4) I35{0,4} NICs seem to be affected. Moreover, they all worked fine wh= ile running either 11.4-STABLE or even 12.1-STABLE at the beginning of 2021. --=20 You are receiving this mail because: You are the assignee for the bug.=
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