---------- Forwarded message ----------
From: "Jorge Evangelista" < netsecuredata@xxxxxxxxx>
To: lartc@xxxxxxxxxxxxxxx
Date: Sat, 1 Sep 2007 18:33:35 -0500
Subject: Re: 2 ISP connection sharing problem
Hi,
You should change your last rule for some as it:
ip route add equalize default nexthop via 192.168.1.1 dev eth0
nexthop via 201.81.219.1 dev eth2
It works fine for load balancing, but when a failure occurrs on one
line, whats happen? if one line is down the change it is too slow, and
the cache for the route is still there and when I want this Host again
the old route is through from the "down" line.
I have a script which runs via ping and cron when next hop is down,
the box linux will change to use one line.
On 9/1/07, Arman <arman.anwar@xxxxxxxxx> wrote:
> Hi all,
>
> I have a similar question like many asked before I know but Please
> help as i cant figure out where the problem is and how should I tackle.
>
> I have 2 ISP connections. I want to share the bandwidth from both. I have
> copied the script from many places and created my own after changes. Problem
> is that only one connection is utilized at a time. Not both working. ratio
> of consuming bandwisth between then is around 1:30.
>
> both connections are from dhcp that is dynamic. configuration from 1 ISP
> remains same and from 1 changes.
>
> EXTERNAL_IP_2=" 201.81.219.95"
> EXTERNAL_NETWORK_2=" 201.81.219.0"
> EXTERNAL_GATEWAY_IP_2=" 201.81.219.1"
>
> echo 200 T1 >> /etc/iproute2/rt_tables
> echo 201 T2 >> /etc/iproute2/rt_tables
>
> ip route add 192.168.1.0 dev eth1 src 192.168.1.2 table T1
> ip route add default via 192.168.1.1 table T1
> ip route add $EXTERNAL_NETWORK_2 dev eth2 src $EXTERNAL_IP_2 table T2
> ip route add default via $EXTERNAL_GATEWAY_IP_2 table T2
>
> ip route add 192.168.3.0 dev eth0 table T1
> ip route add 192.168.1.0 dev eth1 table T1
> ip route add 127.0.0.0/8 dev lo table T1
> ip route add 192.168.3.0 dev eth0 table T2
> ip route add $EXTERNAL_NETWORK_2 dev eth2 table T2
> ip route add 127.0.0.0/8 dev lo table T2
>
> ip route add 192.168.1.0 dev eth1 src 192.168.1.2
> ip route add $EXTERNAL_NETWORK_2 dev eth2 src $EXTERNAL_IP_2
>
> ip route add default via $EXTERNAL_GATEWAY_IP_2
>
> ip rule add from 192.168.1.2 table T1
> ip rule add from $EXTERNAL_IP_2 table T2
>
> ip route add default scope global nexthop via 192.168.1.1 dev eth1 weight 1
> nexthop via $EXTERNAL_GATEWAY_IP_2 dev eth2 weight 2
>
>
> route command output is
>
> Destination Gateway Genmask Flags Metric Ref
> Use Iface
> 192.168.1.0 * 255.255.255.255 UH 0 0
> 0 eth1
> 192.168.3.0 * 255.255.255.0 U 0
> 0 0 eth0
> 192.168.1.0 * 255.255.255.0 U 0
> 0 0 eth1
> 201.81.219.0 * 255.255.255.0 U 0
> 0 0 eth2
> default 201.81.219.1 0.0.0.0 UG 0
> 0 0 eth2
>
> Problem is that the interface which is set gateway is used only. The other
> one remains idle.
>
> --
> Regards,
> Arman
>
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