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Re: problems with direct routing and ARP

To: Donald Ball <balld@xxxxxxxxxxxxxxx>
Subject: Re: problems with direct routing and ARP
Cc: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
From: Julian Anastasov <uli@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 20 Apr 2000 13:12:17 +0300 (EEST)
        Hello,

On Thu, 20 Apr 2000, Donald Ball wrote:

> Hi guys. I'm having trouble getting my direct routing LVS cluster up and
> running. Per the instructions on
> 
> http://linuxvirtualserver.org/arp.html
> 
> and this message
> 
> http://marc.theaimsgroup.com/?l=linux-virtual-server&m=95533730908496&w=2
> 
> I issued the following commands on one of my real servers:
> 
> echo "1" >/proc/sys/net/ipv4/conf/all/hidden
> echo "1" >/proc/sys/net/ipv4/conf/lo/hidden
> ifconfig lo:0 206.66.49.220 mtu 150

        You forgot to netmask 255.255.255.255. The packets are
treated as source martians because the whole network is treated as local.

> 
> where 206.66.49.220 is one of the public ip addresses that the cluster is
> serving. Sadly, now the real server cannot communicate with the
> 206.66.49.0 network anymore. Actually, that's a lie - ICMP pings work
> great, UDP name services don't work at all, telnet closes immediately.
> Tcpdump seems to indicate that the real server is attempting to use the lo
> interface to communicate with the 206.66.49.0 network, even though the
> route command clearly shows that it should go over eth0:
> 
> [root@johnny /root]# route
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> johnny-internal *               255.255.255.255 UH    0      0        0 eth1
> 206.66.49.219   *               255.255.255.255 UH    0      0        0 eth0
> 206.66.49.0     *               255.255.255.0   U     0      0        0 eth0
> 192.168.1.0     *               255.255.255.0   U     0      0        0 eth1
> 127.0.0.0       *               255.0.0.0       U     0      0        0 lo
> default         206.66.49.1     0.0.0.0         UG    0      0        0 eth0
> 
> I'm confused. Can someone point me in the right direction here? Thanks.
> 
> - donald
> 
> 
> 


Regards

--
Julian Anastasov <uli@xxxxxxxxxxxxxxxxxxxxxx>



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