Date: Tue, 07 Dec 2021 10:07:50 +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-Kcw17skn7D@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-260260-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260260 --- Comment #2 from Zhenlei Huang <zlei.huang@gmail.com> --- So it is weird. If VLANMTU is disabled on parent interface, MTU of VLAN interface will be limited off by 4 automatically. The MTU of vlans should be 8996 in your case. Try the following steps: 1. Disabling all vlan hardware offloading features in rc.conf: ifconfig_igb0="mtu 9000 -vlanmtu -vlanhwtag -vlanhwfilter -vlanhwtso -vlanhwcsum up" ifconfig_igb1="mtu 9000 -vlanmtu -vlanhwtag -vlanhwfilter -vlanhwtso -vlanhwcsum up" 2. reboot For the 2nd step, you could also destroy cloned interfaces and restart netif service. # ifconfig vlan0 destroy # ifconfig vlan1 destroy # ifconfig ... destroy # ifconfig lagg0 destroy # service netif restart -- You are receiving this mail because: You are the assignee for the bug.home | help
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