Date: Sat, 12 May 2007 10:41:04 -0700 (PDT) From: Craig Russell <crussell_1969@yahoo.com> To: freebsd <freebsd-questions@freebsd.org> Subject: Wierd Network problem Message-ID: <20070512174104.74533.qmail@web51601.mail.re2.yahoo.com>
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I have a dell poweredge 6650 installed with freebsd 6.1 and on the local router, everything works great (ie, a computer on a different subnet off the same router can access it fine) but coming from outside of the network access is incredibly slow. My first thought was that it must be a routing issue, but I have two other freebsd 6.1 servers on that same subnet and I can access them fine from outside. I dug a little further and compared the servers that are working with those that are not and these are the differences that I have found. On the servers that are working (dell poweredge 2450's) the interface is an fxp0 and here is the output of ifconfig: fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 options=8<VLAN_MTU> inet6 fe80::2b0:d0ff:fee1:f66a%fxp0 prefixlen 64 scopeid 0x1 inet 64.25.218.2 netmask 0xffffff80 broadcast 64.25.218.127 ether 00:b0:d0:e1:f6:6a media: Ethernet autoselect (100baseTX <full-duplex>) status: active on the server that is not working: bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 options=1b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING> inet6 fe80::211:43ff:fedc:9aa2%bge0 prefixlen 64 scopeid 0x1 inet 64.25.218.10 netmask 0xffffff80 broadcast 64.25.218.127 ether 00:11:43:dc:9a:a2 media: Ethernet autoselect (100baseTX <full-duplex>) status: active The first thing that i noticed is that on the option line there is quite a bit of difference between the two. So using the command line ifconfig tool I removed RXCSUM, TXCSUM from the bge0 interface. Voila! Speed increased and the server was actually accessible from off net. Unfortunately, as soon as I tried to access any other port, the interface crashes. Eventually the watchdog picks up on that and restarts the interface. But the problem is completely repeatable. The server that I am having problems with is running cpanel 10.9; the two that are working are running the dns-only version of cpanel. I am not picking up any errors in the logs. This could be related to cpanel, or not, I'm not really sure, although it shouldn't be. The other unique thing about the setup, that very well may be affecting is that the router in question has two subnets configured on the internal port. There is a nat'd subnet for our local users and there is the public subnet that these servers sit on. The final resting place for all three is in a datacenter that isn't built yet, so rather than reconfigure everything once that was done I simply routed the final subnet to our office and set it up their. The router is a mikrotik RB112 board which only has one ethernet port so I couldn't dedicate a port for the new subnet. As I said, my first thought was that the problem was in the router, but the other two servers are running fine. Any suggestions? Thank you, Craig Russell
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