[j-nsp] Load Balancing with LSPs

[Ariff Premji]

Luis,
A couple of questions.

1. What is the hw platform?
2. Is there enough variance in the traffic itself?  The reason being  
that the algorithm is based on a hash mechanism that ensures that  
packets belonging to the same flow always ride the same path.  So if  
there isnt enough variance in the 5 tuples (sometimes can be increased  
or decreased on the newer platforms), then you will see this sticky  
behavior.  A ping will not be a good test. This usually  happens when  
a NAT box or proxy-server are in the mix since the IPs of several  
devices can be hidden by the NAT/proxy-servers.

-Ariff
On Nov 17, 2008, at 2:37 PM, luis barrios wrote:

> Hello .. I have a  PE router conected to a P router with E1s  
> interfaces.
> I
> built 3 LSPs  and each LSP with the respective path, each Path is  
> taking
> one
> E1. Actually when i see the routing table i see that the routes has 3
> posible next hops and they are the 3 LSPs .    I have configured in  
> the
> routing table load balancing per packet but it doesnt work well,  
> Almost
> all
> traffic is taking only one E1.
>
> label-switched-path Pop1-NodoJDC_1 {
>    to X.X.X.X;
>    primary Path-Pop1-NodoJDC_1;
>    no-cspf;
>
> label-switched-path Pop1-NodoJDC_2 {
>    to X.X.X.X;
>    primary Path-Pop1-NodoJDC_2;
>    no-cspf;
>
> label-switched-path Pop1-NodoJDC_2 {
>    to X.X.X.X;
>    primary Path-Pop1-NodoJDC_3;
>    no-cspf;
>
>
> path Path-Pop1-NodoJDC_1 {
>    YY.YY.YY.A strict;
>
> }
>
> path Path-Pop1-NodoJDC_2 {
>    YY.YY.YY.B strict;
>
> }
> path Path-Pop1-NodoJDC_3 {
>    YY.YY.YY.C strict;
>
> }
>
>
> forwarding-table {
>    export Load-Balancing;
> }
>
> lbarrios at XX# top show policy-options policy-statement Load-Balancing
> then {
>    load-balance per-packet;
> }
>
>
> the route is
> X.X.X.X/32  *[RSVP/7] 1d 08:23:15, metric 50
>                      via e1-0/1/1.0, label-switched-path Pop1- 
> NodoJDC_1
>                      via e1-0/1/0.0, label-switched-path Pop1- 
> NodoJDC_2
>> via e1-0/1/2.0, label-switched-path Pop1-NodoJDC_3
>
>
>
>
> I have configure VRFs and in the route table of each VRF i see the
> routes
> with the 3 LSPs, but i dont know why the traffic is taking allmost  
> only
> one
> E1s
>
> Thanks for your help , i appreciate it so much.
>
> luis
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