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[DragonFlyBSD - Bug #2292] re interface with jumbo frames (mtu larger than 1500) hangs after some traffic


From: Stefan Krüger via Redmine <bugtracker-admin@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 27 Jan 2012 01:04:09 -0800

Issue #2292 has been reported by Stefan Krüger.

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Bug #2292: re interface with jumbo frames (mtu larger than 1500) hangs after some traffic
http://bugs.dragonflybsd.org/issues/2292

Author: Stefan Krüger
Status: New
Priority: Normal
Assignee: 
Category: 
Target version: 


How to reproduce:
ifconfig re0 mtu 4088
cd /usr; make pkgsrc-create
wait a bit
re0 completely hangs; no ping; nothing when tcpdumping; nothing dmesg either

doing a
ifconfig re0 mtu 1500
gets it back to life though...

uname:
DragonFly v3.1.0.47.ge2743-DEVELOPMENT #0: Tue Jan 24 09:47:50 UTC 2012
    root@pkgbox64.dragonflybsd.org:/usr/obj/usr/src/sys/X86_64_GENERIC

dmesg:
re0: <RealTek 8111/8168 PCIe Gigabit Ethernet> port 0xe800-0xe8ff mem 0xfbffc000-0xfbffffff,0xfbffb000-0xfbffbfff irq 36 at device 0.0 on pci5
re0: Hardware rev. 0x2c000000; MAC ver. 0x2e; PCI-E 125MHz
miibus0: <MII bus> on re0
rgephy0: <8211B/RTL8169S/8110S media interface> on miibus0
rgephy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto


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