Date: Sun, 24 Jun 2018 20:30:47 -0400 From: Jim Pingle <lists@pingle.org> To: David Samms <2yt@gmx.com>, freebsd-stable@freebsd.org Subject: Re: 11.2-RC3 regression - networking igb driver Message-ID: <2c4e2c6c-ef7a-66a3-e21d-222026c9e88c@pingle.org> In-Reply-To: <2b154303-35f8-df8e-5d2f-ea93b8fdad1d@gmx.com> References: <2b154303-35f8-df8e-5d2f-ea93b8fdad1d@gmx.com>
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On 6/23/2018 1:27 PM, David Samms wrote: > There is a regression in 11.2-RC3 that effects the igb driver for Intels > C2000 SoC I354 Quad GbE Controller > > Supermicro A1SRi-2558F > http://www.supermicro.com/products/motherboard/Atom/X10/A1SRi-2558F.cfm > > This server has run 10.x and 11.x fine up till 11.2-RC3. > > PROBLEM: > with 11.2-RC3 the server boots and gets a network connection to the > cable modem, but the interface (igb0) resets every 4-8 second. The reset > time appears to be related to network load, but reset withing 10s with > next to no traffic. I did try swapping cables, but with no effect. With > each reset the interface successfully obtains an IP address via DHCP, > works for a few seconds and resets. > > Restoring the server to 11.1-RELEASE-p10 resolves the problem. > > Any suggestions? Does your DHCP server send you an MTU, perhaps? Before the interface resets, what does its MTU show? You might try creating a dhclient.conf that sets "supersede interface-mtu 0;" and see if that helps. The MTU from DHCP feature is new (see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206721 ) and e1000 interfaces will reset when applying the MTU. Jim P.
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