Date: Fri, 19 May 2000 09:49:24 -0500 From: "Travis Leuthauser" <travis@winconx.com> To: "David Miller" <dmiller@search.sparks.net> Cc: <freebsd-questions@freebsd.org> Subject: Re: Multiple NIC's Message-ID: <007c01bfc1a1$6cc97260$20503cd0@travis> References: <Pine.BSF.4.21.0005182128150.27249-100000@search.sparks.net>
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No, they are on the same segment. I'm fighting a performance issue with my news server. For the size of server that I'm building the recommended specs call for multiple NICs. That's the reason I tried adding one to see if that would solve my performance problem. I think I have the problem isolated, but I was really curious about the second NIC. I'm using DNews for my nntp software. I've had no complaints with it. It's worked wonderful for us. What I may do then as the server grows is subnet off separate networks to allow for multiple NICs if it's absolutely necessary. For the time being, I've downed the second NIC. Travis ----- Original Message ----- From: "David Miller" <dmiller@search.sparks.net> To: "Travis Leuthauser" <travis@winconx.com> Cc: <freebsd-questions@freebsd.org> Sent: Thursday, May 18, 2000 8:40 PM Subject: Re: Multiple NIC's > On Thu, 18 May 2000, Travis Leuthauser wrote: > > > I am in the process of building a high volume news server. One NIC will be > > used for our incoming news feed, one for our users to read from, and > > ultimately I will add a third which will be used to feed other news servers. > > Are these on seperate network segments? Any reasonable NIC will saturate > a 100 Mbit ethernet these days, so there's no real performance penalty for > using one card for all three functions if they're on the same wire. > > If they are seperate segments, the more common way to use NIC's is to put > them on seperate networks by subnetting. > > If you're using INN I can't believe you'd be saturating one card, let > alone two, with anything like a normal PC. There are just way too many > disk IO's to handle that much network traffic. > > Out of curiosity, because I'm always looking for a better nnrp server, > what are you using for news software? Not that this has anything to do > with the arp errors. > > Back to your original message: > > > /kernel: arp: xxx.xxx.xxx.12 is on lo0 but got reply from (MAC address > > of xl0) on xl1 > > /kernel: arp: xxx.xxx.xxx.32 is on xl0 but got reply from > > (MAC address of win. 98 box @ .32) on xl1 > > > Should I configure the second NIC with a /32 subnet add just add an > > explicit route? > > The problem is that freebsd is going to expect the NIC's to be on seperate > networks, and to see packets from a particular network only coming in that > specific card. So if both cards are on the same network, and it sound > like they're on the same ethenet segment, you're going to get these. If > it's working you can probably learn to ignore the messages, but I'd just > go with a single card unless all the boxes you described are on different > networks. Then I'd subnet the network so as to isolate traffic properly. > > --- David > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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