Date: Wed, 08 Oct 2014 11:59:17 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 194238] New: Ping attempted with MTU 9000 transmits fragmented packets of size 1500 Message-ID: <bug-194238-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194238 Bug ID: 194238 Summary: Ping attempted with MTU 9000 transmits fragmented packets of size 1500 Product: Base System Version: 10.0-RELEASE Hardware: amd64 OS: Any Status: Needs Triage Severity: Affects Many People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: praveenchoudary.gokina@emulex.com Setup Details: Machine1: OS: FreeBSD 10.0 We are using below Emulex skyhawk adapter. oce3@pci0:4:0:3: class=0x020000 card=0xe8fe10df chip=0x072010df rev=0x10 hdr=0x00 vendor = 'Emulex Corporation' device = 'OneConnect NIC (Skyhawk)' class = network subclass = ethernet bar [10] = type Prefetchable Memory, range 64, base 0xfa700000, size 16384, enabled bar [18] = type Prefetchable Memory, range 64, base 0xfa620000, size 131072, enabled bar [20] = type Prefetchable Memory, range 64, base 0xfa600000, size 131072, enabled Machine2: OS: FreeBSD 10.0 We are using below Emulex skyhawk adapter. oce1@pci0:5:0:1: class=0x020000 card=0xe80010df chip=0x072010df rev=0x10 hdr=0x00 vendor = 'Emulex Corporation' device = 'OneConnect NIC (Skyhawk)' class = network subclass = ethernet bar [10] = type Prefetchable Memory, range 64, base 0xfa780000, size 16384, enabled bar [18] = type Prefetchable Memory, range 64, base 0xfa720000, size 131072, enabled bar [20] = type Prefetchable Memory, range 64, base 0xfa700000, size 131072, enabled Both the adapters are connected directly without switch. Both the interfaces are configured with mtu=9000 When we send jumbo frames from machine1 to machine2, packets are getting fragmented to 1500bytes. To reproduce, we can use "ping -s 9000 <peer ipaddr> " on Machine1. tcpdump on Machine1 shows packets of length 1500 bytes. We are observing this behavior even with other adapters like Intel igb0@pci0:2:0:0: class=0x020000 card=0x152115d9 chip=0x15218086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = 'I350 Gigabit Network Connection' class = network subclass = ethernet bar [10] = type Memory, range 32, base 0xfbc20000, size 131072, enabled bar [18] = type I/O Port, range 32, base 0xe020, size 32, enabled bar [1c] = type Memory, range 32, base 0xfbc44000, size 16384, enabled -- You are receiving this mail because: You are the assignee for the bug.
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