Replacing 8g Brocade SAN Switch with 16G which has ISL connection

Hi Support,

we have 2 Data centers(DC1 and DC2) the ISL is connected between DC1(16G-SAN Switch) << to>> DC2 (8G-SAN Switch), now i want to replace 8G Switch with 16G.

ON DC2 8G SAN Switch got another 2 Switches connected (via ISL). The same setup at Fabric A and Fabric B.

i am planning to add 16G SAN Switch at Fabric B first, if i replace 8g with 16G will it effect other 2 SAN Switches connected? 

may i know the best practice to do this?