Load Sharing VPLS end

[Julian_Eble]

Hello Community,

I'm having headache about the load-balance on Aggreation Ports.

Our scenery is a MPLS network who the end point are connected by Juniper Routers.
These connections are 10G (20g agg) and have one VLAN VPLS tagged end-by-end.
The traffic doesn't get balanced even when I change the hash-algorithm and the balance type.

Is there any problem using VPLS and LACP?
Extreme introduced the load-sharing VPLS but I think that useful just for the trunk LACP/MPLS, isn't?

Thanks,
Julian Eble

[Klaus_Schneider]

Hello Joe.

It is really the case of hash algorithm? Because on our case(Douglas) the traffic comes from only one of the interfaces and on the other comes nothing.

[Colatuno__Joe]

Hey Julian and Douglas,

I am curious if you have tested with other algorithms beside L3_L4? What are the results with just static L2 algorithm? On the x460 you can also create a custom hash algorithm and change the addressed based algorithm from default xor to crc-16.The xor hash algorithm guarantees that the same egress port is selected for traffic distribution based on a pair of IP addresses, Layer4 ports, or both, regardless of which is the source and which is the destination. Possibly switching this to crc-16 could help you out

Below is the command:

configure sharing addressed-based custom hash-algorithm

configure sharing address-based custom ipv4

Again, the best algorithm for the most even distribution really depends on the traffic. This is why I recommend mirroring the traffic egressing the switch to gain a better understanding source > destination traffic we are dealing with.

I also wanted to show you an example of how different types of traffic can affect which ports traffic takes. Here is a good example on our Knowledge base of multicast traffic not being shared across a lag.

Have a look and let us know if you have any questions

http://gtacknowledge.extremenetworks.com/articles/Solution/Multicast-traffic-to-be-shared-properly-o...

[Douglas_Machado]

See topology below:

As julian said, there's no MPLS configured between the switch B and the router or whatever other equipment in other side.

[Douglas_Machado]

Here follows the configuration, that works and that not works, in this sequence:

show sharing Load Sharing Monitor
Config Current Agg Ld Share Ld Share Agg Link Link Up
Master Master Control Algorithm Group Mbr State Transitions
==============================================================================
2 2 Static L3_L4 2 Y A 1
L3_L4 3 Y A 1
L3_L4 4 Y A 1
L3_L4 5 Y A 1
==============================================================================

System Type: X460-24x
Current State: OPERATIONAL
Image Selected: primary
Image Booted: primary
Primary ver: 15.6.1.4

#############################################################

27 27 Static L3_L4 27 Y A 0 L3_L4 28 Y A 0
==============================================================================

System Type: X460-24x
Current State: OPERATIONAL
Image Selected: primary
Image Booted: primary
Primary ver: 15.6.1.4

[Douglas_Machado]

And in other running case, it works normally, with same configuration. In this case without a router, because that I am delivering the VPLS circuit to my customer.