I have two campus building which have the distance in between 100 meter, if i want to connect both buildings network with Bridge network ( Prefer Wired network) , which type of equipment i should use ?

I am getting this issue , when try to build etherchannel trunk in between this unit C4510 with the other C4506Physically can see that the slot 2 shows red light.  I had tried reinsert the line card of slot 2 still show same error below when show log,...

I have 2 units core swicth C4510R+E SUP7-E  need to connect together for redundant purpose , i bought also 4X 10GE uplinks for each core switches .May i know how i shall connect both core switches together using my spec Catalyst 4500 E-Series 12-Port...