How to Merge 2 different Bandwidth Together radio 1 and radio 2

[saahiprahi]

Site 1 Radio bandwidth - 30 Mbps ( switch 1) IP address 192.168.1.2
Site 2 Radio bandwidth - 30 Mbps ( switch 2) IP address 192.168.1.200

In between Site 1 to Site 2 Radio are having a distance of 5 km

Customer distance is 2 km from Site 1 radio location and requesting for 60 Mbps bandwidth

customer is having 1 L2 switch

How to merge both radio bandwidth together and provide 60 Mbps output to customer

[balaji.bandi]

This was not clear, both the links are p2p and same location termination on Layer 2 switch, then you can do port bundling,

if not, you need use different IGP to Load-balance the traffic (that means sharing both the links at the same time)

worth adding a diagram for us to review and suggest. and tell us what equipment have both the side

[saahiprahi]

Both the link are not on the same location 

[saahiprahi]

Two radio links , each with a bandwidth of 30 Mbps, are available between two sites separated by a distance of 5 km.

what is the best solution to combine the bandwidth of both radio links to provide 60 Mbps output

[balaji.bandi]

How can you get aggregated bandwidth if they are not terminating at the same Location?

[Leo Laohoo]

What AP and antennas are installed in them?

What band is used as a backhaul?

[Joseph W. Doherty]

Yours is an "it depends" kind of answer.

As initially described by @balaji.bandi if you have two independent L2 radio paths, or two independent L3 radio paths, L2 bundling or L3 load sharing might be used.  However, there are equipment and topology requirements for both.  Also, by default, a single flow could only use a single path, and multiple flows usually will not use the two paths equally, especially in short term usage. L3 may offer great load balancing, but with pitfalls.

Other options might include a hardware mux to use the two paths aggregate bandwidth, or, possibly depending on if a single radio, per site, is being used, it might be able to form larger bandwidth channels by using a larger continuous slice of physical radio bandwidth.

To provide more specific options you need to provide more specific information about your current environment and what you desire.