Intelligent Load Balancing

[mbasalp]

Hi;

I have a topology with the following scenerio:

Link-1 4Mbps VoIP only

R1------------------------------------R2

|

|

|

R3------------------------------------R4

Link-2 16Mbps Data only

I always use Link-1 to be carried voice traffic only. If Link-1 goes down , VoIP traffic is passed through Link 2 by configuring a static routing with a higher metric.

But sometimes Link1 is being saturated due to high traffic and VoIP users begin to face delay,jitter problems etc.

Is there a way to allocate specific bandwidth, in this case for example 3600 Kpbs for the inbound and outbound of R1's serial interface. And if the VoIP traffic exceeds the value of 3600Kpbs, the traffic would be re-routed to pass through R3 by configuring a policy ?

Thanks in advance

mali

[mbasalp]

no idea? While i was looking for the solution, i have found mpls TE fast reroute feauture. But i am not sure whether it solves my problem or not...

thanks in advance

mali

[mnordhoff]

Some thoughts or possible options...

1. Use a hardware load balancer to load balance the paths based on ratio (i.e. send 4 sessions down link 2 for every 1 session sent down link 1).

2. Use a routing protocol like EIGRP or OSPF that supports load balancing across multiple paths.

3. Use policy routing in conjunction with a police statement to "tag" incoming traffic with one value if the current traffic level is less than 3.6Mbps and a second value if the current traffic level is more than 3.6Mbps. Then use an outbound policy route to route the traffic to either link based on the packet "tag".

Just a few suggestions off the top of my head...