[j-nsp] Load Balancing with LSPs

[luis barrios]

Thanks for your answer...
The P router is M10i ( 8.2 R2.4) , the PE router is m7i ( 7.3R1.5)Im working
with real traffic and there are a lot of application using the links.  And
the behavior of the hash mechanism could be the reason of what im seeing ..
do you know how can i test change the behavior of the algorithm, thanks ..

thanks Ariff

luis



2008/11/17 Ariff Premji <premji at speakeasy.net>

> 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
>> _______________________________________________
>> juniper-nsp mailing list juniper-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/juniper-nsp
>>
>
>