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Cisco Dual Wan Rv042 Not Optimizing Internet Speed


We have two WAN, Airtel(Primary-8mbps) and BSNL(secondary-6mbps) connected to Internet and DMZ port of Cisco Rv042.

I have checked the speed of both WAN by connecting each router separately to a laptop. The Cisco Dual wan is supposed to optimize the speed to around 13 to 14 mbps but instead the dual wan is giving me a speed of 4 to 6 mbps. If i remove Airtel from Dual wan i am getting the speed of BSNL which is 6 mbps and if i remove BSNL then i get the speed of Airtel which is 8mbps but if i connect both to Dual Wan then speed decreases 4-6 mbps.

I had configured this Dual Wan in September,2015. It had been optimizing the speed to 12-13 mbps but from last Feb i am facing this issue. No one have access to this router except me and i have not done any changes since last September.

What might have happened ? Can anyone help please ?

Please let me know.



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