Date: Fri, 29 Feb 2008 15:03:53 +0900 From: Pyun YongHyeon <pyunyh@gmail.com> To: freebsd-net@freebsd.org Subject: Re: vlan issues with 7.0-RC3 Message-ID: <20080229060353.GC60623@cdnetworks.co.kr> In-Reply-To: <20080228023840.GR58253@hal.rescomp.berkeley.edu> References: <20080225091712.GM88015@hal.rescomp.berkeley.edu> <20080226074355.GD47750@cdnetworks.co.kr> <20080228023840.GR58253@hal.rescomp.berkeley.edu>
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On Wed, Feb 27, 2008 at 06:38:40PM -0800, Christopher Cowart wrote: > On Tue, Feb 26, 2008 at 04:43:55PM +0900, Pyun YongHyeon wrote: > >On Mon, Feb 25, 2008 at 01:17:12AM -0800, Christopher Cowart wrote: > >> Hello, > >> > >> I have a mac mini running 7.0-RC3, which I'm trying to turn it into a > >> router. I have a Linksys SRW2008 "fully managed" (via an IE only web > >> interface, ick) switch. > >> > >> Switch: > >> Port 1 - Trunk vlans 10,60,98 - FreeBSD Box > >> Port 7 - Access vlan 98 - Existing LAN (192.168.1.0/24) > >> > >> OpenWRT (192.168.1.1): > >> WRT54G box on the Existing LAN > >> > >> FreeBSD Box: > >> ifconfig msk0 up > >> ifconfig vlan98 create vlan 98 vlandev msk0 inet 192.168.1.67/24 > >> > >> With this configuration, I can ping hosts on the other lan segment (Port > >> 7). Arp and icmp seem to be quite happy. Unfortunately, I'm not having > >> any luck with tcp and udp. Any attempt to ssh to OpenWRT or dig > >> @OpenWRT hangs indefinitely. If I do a tcpdump, I see the SYN or A? > >> leaving and absolutely no response returning. If I run a tcpdump on > >> OpenWRT, I see no incoming traffic. > >> > >> When I try to connect *to* the FreeBSD box from the other lan segment, I > >> continue to have problems. tcpdump shows the SYNs arriving via vlan98 > >> and the FreeBSD box responding with SYN-ACK. OpenWRT receives the SYNACK. > >> > >> I disabled ipfw just to be sure (sysctl -w net.inet.ip.fw.enable=0), but > >> it had no effect on the problem. If I connect the FreeBSD box to a vlan > >> 98 access port and assign the address to msk0, my connectivity problems > >> go away. This leads me to believe that the firewall on OpenWRT is not > >> the problem and the problem is related to vlans. > >> > >> Thinking it was a problem with the not-so-cheap Linksys POS (bitterness > >> about the IE web interface again), I plugged my MacBook (running > >> Leopard, not FreeBSD) into the trunk port. Running the ifconfig commands > >> above (s/msk0/en0/), I got up and running without any problems. This > >> causes me to suspect the FreeBSD box. > >> > >> Does anyone have any idea what's going on here? Any suggestions for > >> further troubleshooting? > >> > > > > Try disabling hardware features one by one in msk(4) and see how > > it goes. > > o Disable TSO. > > o Disable Tx checksum offload. > > o Disable VLAN hardware tagging. > > Works great after `sudo ifconfig msk0 -txcsum'. > > Is this a known bug, or should I file a PR? Let me know if there are any > other details I can provide to help somebody squash it. > Would you capture broken TCP/UDP frames with tcpdump on receiving side and show it to me? -- Regards, Pyun YongHyeon
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