Re: Bizarre Networking Problem
On Thu, 20 Feb 2003 at 7:20pm Bill Moran wrote: Perhaps some output form 'netstat -rn' and 'ifconfig' might provoke some more useful answers. Well the problem is solved, but I am not happy about the solution as it makes absolutely no sense to me. xl0: flags=8943UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST mtu 1500 options=3rxcsum,txcsum inet 192.246.38.10 netmask 0xff00 broadcast 255.255.255.0 inet 208.23.240.10 netmask 0xff00 broadcast 208.23.240.255 ether 00:04:75:b0:24:12 media: Ethernet autoselect (100baseTX full-duplex) status: active The above was the ifconfig when I had the problem. Notice the broadcast addresses. The commands that brought up the interface at boot are: /sbin/ifconfig xl0 192.246.38.10 netmask 255.255.255.0 /sbin/ifconfig xl0 alias 208.23.240.10 netmask 255.255.255.0 (note that the netmask really is not required as those IP's are from traditional class C, but I like to always be specific so I don't forget one when I'm working in 'A' or 'B' space.) So those commands give two different kinds of broadcast addresses and to my way of thinking, the second one (on the 208...) is correct. But if I alias the interface like so: ifconfig inet 208.23.240.10 netmask 0xff00 broadcast 255.255.255.0 The sluggishness on the 208 net goes away. I don't understand it, but it works. I don't like stuff this, it creeps me out. -- Joseph F. Noonan Rigaku/MSC Inc. [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Bizarre Networking Problem
I have a really weird networking issue on my firewall box. The machine in question has an ethernet facing a cisco facing the Internet and an ethernet facing the LAN plugged into a 3com 100Mbit switch. My LAN has all of the servers and most of the workstations sitting in the /24 that I've had for 10 years. Some of the newer workstations are now sitting on a /24 that I got from one of my providers when I filled up the old space. On xl0, the LAN ether, I simply added one of the new /24's to the interface with an ifconfig -alias and thought everything was good. And it was for users that only use the LAN for e-mail and www. But when I added some users that started messing around with 25MB pppts or 100MB .docs, the performance became pathetic, like in the single or low double digit kbps. The very same computer, can download a 100MB file from the 'net over a T1 faster than it can get a 50MB file off of my Samba based BSD file server. If I change the machines IP to one in the old /24 everything is fine again. Now it gets really weird. Today, one of my associates was investigating this problem and doing the experiments that document the above facts on two different machine. He called me and told me what he found. I logged into the firewall and started running tcpdump against the one address and also looking at the firewall logs to make sure I wasn't firewalling my own network. A few minutes later one of the users afflicted by this issue called to thank me for fixing the problem. I said eh? I haven't done anything other than look at the problem and I'm stumped. He says whatever, works great now! My associate confirmed this on another machine. Well, it is true, I *did* do something: I put xl0 into promiscuous mode. But why oh why is that fixing what should not even be a problem to begin with? Any klews cheerfully accepted (including hitting me with a clue-by-4 if I'm missing something obvious). -- Joseph F. Noonan Rigaku/MSC Inc. [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Re: download freebsd
On Thu, 20 Feb 2003 at 2:22pm Jeff Jirsa wrote: Dominique Mabileau [EMAIL PROTECTED] wrote: Hello, My screen get frozen every time I click on the link to download FreeBsd (French, German, ...). I'm using Windows2000/IE6. Can you help me ? Use the standard windows ftp client. From the command line, just type 'ftp'. Unless they've changed it very recently, that will not help because the cmd line ftp from M$ doesn't have passive mode. In IE you need to go into Tools -- Internet Options -- Browsing and check the box that says something like Use Passive mode FTP for compat with some firewalls. (Why in Dog's name this is not the default in 2003 is known only to the wizards of Redmond...) To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
