[LARTC] 2 ISP connection sharing problem

[Jorge Evangelista]

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 at gmail.com> 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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>


-- 
"The network is the computer"