It wasn't clear from your first description that you're using WDS. Now what you said about the WDS setup of the 15 MikroTik routers that make up your campus wide network basically sounds OK (if they do WDS then indeed they need to 'see' each other, use the same channel etc.)
But what about the Linksys indoor APs? You still did not make it clear how they interact with your MikroTik network. Are the Linksys configured for WDS? If so, is the WDS link seen to be 'up' on both ends (MT, Linksys)? Is WDS your only way to interconnect accesspoints or do you also use wired LAN infrastructure?
sorry for the ambiguity.
for particular senero. both the linksys AP inside and the MT AP ouside both independently connect to the same switch from their ethernet interface as internet source. but they give internet to their wireless client on their wireless interfaces. as i said earlier they have the same config except that the linksys does not support wds. my observvation is this, immediately we put on the linksys AP inside, even the people outside that was browsing on MT AP will start getting limited connectivity.
the intention for puting the linksys AP in the first place is bcos signal from MT outside to offices inside the building was weak.
i read that max of 3 networks can exist in the same place without interference each in one of the non-overlapping channels.
what i want to understand is this
Does 3 networks mean 3 Access Points as a number?
that each of these 3 networks can contain several access points but with
the same ssid, freq and band.?
if my 2nd questions is yes, can the APs that make up one network be from different manufacturers?
thanks making things easier for me.