Load Balancing between two cisco router

yusufdeen

Junior Member
Dec 24, 2013
4
0
0
Hello Friends,
Please advise me,We are using two Cisco Routers with F5 Load balancer,

Router A (Cisco 2811) has one ISP configured
Router B (Cisco 3825) has the other ISP configured

ISP on Router A has 5 Mbps Bandwidth

ISP on Router B has 10 Mbps Bandwidth

My Doubt is if one of the link is down,F5 is load balanced but the packet is go to both downed and working interface( Fast ethernet or Gigabit ethernet) it becomes slow down the internet.How to stop the packet travel to downed ISP router ?

Additional information

We are using a Default routing protocol (ip route 0.0.0.0 0.0.0.0 other wan intf ip )
F5 load balancer model F5 BIG IP

Here i have attached my N/w diagram for ur reference Link (https://drive.google.com/file/d/0B9RtL4rQyVBTV1RTd2ZaeGtOX2c/edit?usp=sharing)..........

Can someone solve my question.............please

 

hextet

Member
Dec 30, 2013
34
0
0
From my current Cisco training I think you are looking at this the wrong way. Default routes are static routes and can't be used for load balancing as far as I know. Lets say you have a router with two ways to get to a network, and both ways have the same metric. Load balancing means that the routing protocol you have in place is able to seperate the amount of packets being sent to the destination in half. One half goes one way, and the other half goes another way. RIPv2 has equal cost load balancing, and EIGRP has unequal cost load balancing. A default route is not a routing protocol, it goes under teh category of static routes. Also default routes aren't used right away, if you have no other routes towards the destination in your routing table, than the default is used and the packets are setn to the gateway of last resort. So due to this, if you are using a routing protocol, you should perhaps get rid of your default routes as that could just be complicating things, or you could create a floating static route which will be used in the event of the link goign down, that points towards the link that is up and working, I hope that makes sense!