Date: Tue, 26 Feb 2008 16:43:55 +0900 From: Pyun YongHyeon <pyunyh@gmail.com> To: freebsd-net@freebsd.org Subject: Re: vlan issues with 7.0-RC3 Message-ID: <20080226074355.GD47750@cdnetworks.co.kr> In-Reply-To: <20080225091712.GM88015@hal.rescomp.berkeley.edu> References: <20080225091712.GM88015@hal.rescomp.berkeley.edu>
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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. -- Regards, Pyun YongHyeon
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