2 Uplinks for load balancing... Please help
I have struggled this for a few days, but still no result.
Currently we have
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uplink A : 192.192.1.0/24
gateway A : 192.192.1.1
Server 1 IP: 192.192.1.5
Server 2 IP: 192.192.1.7
3 connections to the hubs:
eth0 of server 1 to hubs
eth0 of server 2 to hubs
uplink A to hubs
Target
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We would like to have a 2nd uplink from different ISP for load balancing,
and build a server 3 (running Linux) as a gateway as below
Assume
2nd uplink is -
uplink B : 169.169.1.208/255
gateway B : 169.169.1.209
Server 1 IP: 192.192.1.5
Server 2 IP: 192.192.1.7
and Server 3 contains 3 NIC which -
Server 3 eth0 connected to uplink A
Server 3 eth1 connected to uplink B
Server 3 eth2 connected to the hub
3 connections to the hubs:
eth0 of server 1 to hubs
eth0 of server 2 to hubs
eth2 of server 3 to hubs
and can server 3 acts as a gateway, which can
1. for packet destination is US from the hub (i.e. server 1 and 2), then use uplink A. Otherwise use uplink B.
2. Provide some traffic monitoring and control.
Can a Linux gateway server support above requirement?
I tried to setup those routing, ip_forward, in server 3 and server 3 can go to internet, ftp, ping server 1 and 2.
However, server 1 and 2 can ping server 3, but they failed to connect to Internet.
Please see the attachment for details.
If so, any hint(s) or reference document?
Many Many Thanks.
George
