Date: Tue, 15 Oct 2024 00:47:21 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 282095] enic breaks when changing MTU on interfaces with fib other than 0 Message-ID: <bug-282095-227@https.bugs.freebsd.org/bugzilla/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D282095 Bug ID: 282095 Summary: enic breaks when changing MTU on interfaces with fib other than 0 Product: Base System Version: 14.1-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: freebsd-bugzilla@thismonkey.com I'm running a Cisco UCS C220M4 with an MLOM card (2 x 10Gb). I wanted to t= est the enic driver for throughput, so I plugged a DAC cable between the ports, installed a fresh version of 14.1-RELEASE and ran the following: sysctl net.fibs=3D3 ifconfig enic0 inet 172.12.1.1/24 fib 1 ifconfig enic1 inet 172.12.2.1/24 fib 2 route add 172.12.2.0/24 -iface enic0 -fib 1 route add 172.12.1.0/24 -iface enic1 -fib 2 I could then ping/iper3 between the interfaces no problem (with setfib 1 ..= .) As soon as I alter the MTU of either interface to 9000 bytes, I can no long= er ping, all IP breaks. PS. The reason I wanted to bump the MTU was I could only get ~3.7Gb/s of UDP across the interfaces: [ 5] 0.00-10.00 sec 4.27 GBytes 3.67 Gbits/sec 0.001 ms 1142296/428= 0693 (27%) receiver You can see 27% from the sender's side was dropped. Packets were 1460 byte= s. --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-282095-227>