Wan Optimization Support

Technical => Troubleshooting => Topic started by: Sasha on March 19, 2014, 11:21:47 AM

Title: No traffic optimization
Post by: Sasha on March 19, 2014, 11:21:47 AM
Hello Wanos installed on 2 server mode core and edge. Prescribed traffic policy for each subnet. When testing, it became clear that traffic is sent without optimization. thanks in advance
Title: Re: No traffic optimization
Post by: Sasha on March 19, 2014, 11:50:26 AM
Please specify the types of traffic that's just better compressed.
Title: Re: No traffic optimization
Post by: Wanos on March 19, 2014, 12:37:17 PM
Hi Sasha,

Thanks for the feedback. Some traffic might still pass-through without optimization. Is the firewall dropping the traffic without optimization or is the firewall dropping the optimized traffic?
Title: Re: No traffic optimization
Post by: Wanos on March 19, 2014, 12:41:15 PM
There are two best case scenarios:

1) Best for compression is say a 10MB .txt/.doc/.xls with basically repetitive strings e.g. all 0's or 1's or some pattern that repeats. In this case it is possible to show a very good result like 90% reduction

2) Best for deduplication is when the same file is sent a second time. E.g take a 10MB .zip file and send over the WAN. The first copy should be near WAN speed since it is already compressed. The second copy should give you 4-10x speed throughput.
Title: Re: No traffic optimization
Post by: Sasha on March 20, 2014, 03:50:54 AM
After several tests downloaded file format 2 XLS-39MB and ZIP-39MB two protocols FTP, SMB. The result showed no improvement in network performance. Why does not the optimization? These same files are copied twice.
Title: Re: No traffic optimization
Post by: Sasha on March 20, 2014, 03:56:55 AM
Firewall removes traffic, which falls under the traffic policy. Once changed the firewall settings traffic passes, but no optimization. The files are copied over the network with the same speed as without WANOS. thanks in advance
Title: Re: No traffic optimization
Post by: Wanos on March 21, 2014, 07:26:11 PM
Hi Sasha,

Ok, thank you for the feedback. How Wanos works is by reducing traffic sent between the Core and Edge devices. Reducing the traffic normally translates to a speed increase. In your case you did the test multiple times with FTP. Since the firewall dropped traffic once optimization was enabled it is relatively safe to assume the setup is configured correctly (but there might be something if we look into the detail).

Under the following condition optimization will provide no reduction or acceleration:

Under the following conditions optimization will provide traffic reduction but not necessarily throughput acceleration:

To give you an accurate reason for why you are not seeing acceleration we can look at the following:

Free traffic and lan0 vs wan0 statistics:
1) The results either tell us traffic is being reduced over the WAN or
2) Traffic is not being reduced so we need to go back to the configuration, network layout and protocols to see whats going on

WAN speed, Core - FTP Server network speed and latency between the Core and the FTP server
1) We might find WAN speed is too high for the hardware
2) WAN speed is more or less the same as the Core LAN - FTP Server link
3) Core LAN - FTP Server link is held back by high latency
4) Test with WAN Simulation enabled
Title: Re: No traffic optimization
Post by: Sasha on March 26, 2014, 05:10:27 AM
Here are the stats of our network traffic. Also, a network diagram with all speed. FTP server in the local network. The weakest link in the network is an internet connection at the branch at 4 mb / s. What can we do more? thank you
Title: Re: No traffic optimization
Post by: Wanos on March 26, 2014, 06:08:03 PM
Hi Sasha,

Ok, that topology looks really good. 4Mbps should be within the capabilities of a P4 and higher CPU. I don't think this is where the problem is since the free traffic graphs shows little or no optimization, which confirms what you are seeing with your tests.

I think we should double check the config. The two things that I can think of that could cause all traffic to be by-passed is if:
1) 'Core mode' is not enabled on the Core
2) A new traffic policy for optimized traffic is configured but not applied

I have attached the Core policy which looks perfect to me. Is this still correct? If possible restart the Wanos service to make 100% sure this policy is being implemented.


Title: Re: No traffic optimization
Post by: Sasha on March 31, 2014, 10:54:18 AM
Thanks for the help, optimization started working. That's just wanted to clarify, optimization works in both directions? As with the Core to Edge and in the opposite direction with the Edge to Core? thanks in advance
Title: Re: No traffic optimization
Post by: ahenning on March 31, 2014, 06:49:33 PM
Hi Sasha,

Ok, great to hear that. Yes, optimization is enabled in both directions on both Edges and Cores by default. The configuration of the resources is optimized to provide the best Core -> Edge optimization, but it is still possible to do 10X between fully meshed Edges.

The reason behind this is since the majority of network users receive more traffic from a central point than they normally send between each other. This allows for a very small Edge device but also ensures the majority of the resources are applied to the source of the network problem.