How to load balance on two different ISP connections using squid

load balancingsquid

I am trying to use two different isp connections to load balance the request. I have tried it with ip route:

ip route replace default scope global nexthop dev ppp0 weight 1 nexthop dev ppp1 weight 1

But it doesn't work well. Nearly all requests timed out.

I am using squid 2.7. Is there any other possibility to use that?

Best Answer

It would be easiest to tell squid to use http cache from both ISPs and round-robin between these HTTP caches.

But here's some stuff on source routing: http://linux-ip.net/html/adv-multi-internet.html

Use iptables -j MARK to mark the packets based on source address, then create a new routing table in /etc/iproutes/rt_tables and add a new rule ip rule add fwmark 4 table 4 priority 10000.

Original

From a command prompt:

sudo route add default gw i.p.add.ress eth1

Then, in /etc/network/interfaces, add this line:

up route add default gw i.p.add.ress eth1

Of course, replacing i.p.add.ress with the gateway's IP in both lines.

Edit for new question

If you need to delete a route, just change "add" to "del". Example:

(command) sudo route del default gw 128.0.x.x eth0
(/etc/network/interfaces) up route del default gw 128.0.x.x eth0

You can set a static route for the branch office through the route command as well

route add -net (network_id/prefix) GW (gateway) (interface)

Cisco – How to load balance two WAN connections

99% of load-balancing is knowing what you're trying to balance.

If you're trying to simply balance ANY and ALL IP-based traffic between two separate ISPs... you'll definitely need BGP or other similar border-routing protocol. But this will have to be negotiated with BOTH ISPs in order to make it happen.

If you're trying to load balance outbound traffic... many high-quality routers will allow you to do this with minimal effort. Without details of the kind of router... and it's capabilities... I can only guess.

If you're trying to load-balance inbound traffic... you're in for a fight. Quick & dirty DNS-based stratigies for distributing load (round-robin DNS... geographic-based DNS... etc..) are quite abundant... but they do not distribute load evenly. Other solutions are less-than glamorous... and most are dependent on having the IPs available from both ISPs.

Best Answer

Related Solutions

How to force Squid Proxy to use a specific gateway for internet access

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Cisco – How to load balance two WAN connections

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