Re: route to/from xover box
Sorry i didn't send my anser to the maillist but i suggested to use proxyarp with ip_forwarding and made a small example. ( i think its the fasted way to solve this problem. Greatings, Robbert Helling Citeren Tarragon Allen [EMAIL PROTECTED]: On Fri, 25 Apr 2003 01:04 am, Mark Constable wrote: Not strictly Debian related but the boxes in question are deb powered. I have just been given a /28 (16 node) subnet and until I get a switch in place I have a short xover eth cable between two boxes. I thought I could get away with a couple of static routes in the mean time but the upstream default gateway on the first box keeps arping for the IP on the 2nd box... subnet is x.x.x.144/28 ... x.x.x.145 - eth0:x.x.x.146 eth1:x.x.x.147 -xover- eth0:x.x.x.158 Any suggestions as to how x.x.x.158 can see the outside world ? Well, the gateway is ARPing for x.158 because it thinks it's on the same network, which it isn't. Three suggestions : 1) reconfigure the gateway with a static route to x.158 through x.147. 2) configure ethernet bridging on x.147 through to x.158. 3) use a different subnet for the x.158 box. Of course this will require the gateway to be reconfigured as well. Depending on what the x.158 machine needs to do, it might be easier to give it a private IP address and NAT it through the x.147 machine instead. t -- GPG : http://n12turbo.com/tarragon/public.key -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] __ http://www.wanadoo.nl/
route to/from xover box
Not strictly Debian related but the boxes in question are deb powered. I have just been given a /28 (16 node) subnet and until I get a switch in place I have a short xover eth cable between two boxes. I thought I could get away with a couple of static routes in the mean time but the upstream default gateway on the first box keeps arping for the IP on the 2nd box... subnet is x.x.x.144/28 ... x.x.x.145 - eth0:x.x.x.146 eth1:x.x.x.147 -xover- eth0:x.x.x.158 Any suggestions as to how x.x.x.158 can see the outside world ? --markc
Re: route to/from xover box
On Fri, 25 Apr 2003 01:48 am, you wrote: Proxy ARP on the .146/.147 box for .158? I would have thought so too but all my attempts at arp'ing just get errors like... (including a lot of attempted variations).. # arp -i eth1 -s x.x.x.158 00:20:ED:47:B3:21 netmask 255.255.255.240 SIOCSARP: Invalid argument No combination of static routes has worked so far either. I usually work with full c-classes and switches so am on unfamiliar territory. Should I look at bridging the interfaces ? ... perhaps snat ? x.x.x.145 - eth0:x.x.x.146 eth1:x.x.x.147 -xover- eth0:x.x.x.158 --markc
Re: route to/from xover box
Hi Mark, I'm not sure I understand your setup. Is the x.x.x.145 machine your router or your ISP's? What do the routing tables look like for each machine you control? From my experience, an upstream connection is usually placed on a bridge network such as a /30. You may want to try something like transparent bridging... http://www.linux.org/docs/ldp/howto/mini/Bridge/index.html If I were you, I'd expediate that switch. Unless you're going to do some sort of firewall or proxy, a $20 hub will get you by and would make life a lot simpler. -eric Not strictly Debian related but the boxes in question are deb powered. I have just been given a /28 (16 node) subnet and until I get a switch in place I have a short xover eth cable between two boxes. I thought I could get away with a couple of static routes in the mean time but the upstream default gateway on the first box keeps arping for the IP on the 2nd box... subnet is x.x.x.144/28 ... x.x.x.145 - eth0:x.x.x.146 eth1:x.x.x.147 -xover- eth0:x.x.x.158 Any suggestions as to how x.x.x.158 can see the outside world ? --markc -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] * Eric Cunningham Network Administrator Beccel Systems http://www.beccel.com *
Re: route to/from xover box
On Fri, 25 Apr 2003 01:04 am, Mark Constable wrote: Not strictly Debian related but the boxes in question are deb powered. I have just been given a /28 (16 node) subnet and until I get a switch in place I have a short xover eth cable between two boxes. I thought I could get away with a couple of static routes in the mean time but the upstream default gateway on the first box keeps arping for the IP on the 2nd box... subnet is x.x.x.144/28 ... x.x.x.145 - eth0:x.x.x.146 eth1:x.x.x.147 -xover- eth0:x.x.x.158 Any suggestions as to how x.x.x.158 can see the outside world ? Well, the gateway is ARPing for x.158 because it thinks it's on the same network, which it isn't. Three suggestions : 1) reconfigure the gateway with a static route to x.158 through x.147. 2) configure ethernet bridging on x.147 through to x.158. 3) use a different subnet for the x.158 box. Of course this will require the gateway to be reconfigured as well. Depending on what the x.158 machine needs to do, it might be easier to give it a private IP address and NAT it through the x.147 machine instead. t -- GPG : http://n12turbo.com/tarragon/public.key
Re: route to/from xover box (SOLVED)
I have been allocated a x.x.x.144/28 (16 node) subnet .145 is the upstream gateway, .146/.147 is eth0/eth1 on box1 there is a short xover cable between eth1 on box1 and box2 .158 is eth0 on box2 x.x.x.145 - eth0:x.x.x.146 eth1:x.x.x.147 -xover- eth0:x.x.x.158 On box1 (.146/.147) I have a static route... route add x.x.x.158 gw x.x.x.147 On box2 (.158) I did... echo 1 /proc/sys/net/ipv4/conf/eth0/proxy_arp arp -s x.x.x.158 x:x:x:x:x:x pub Thanks to all for your helpful suggestions, and this link... http://www.sjdjweis.com/linux/proxyarp/ --markc
