DNS

DNS Issue any help would be great.

I have 2 domains one called abc.local the other xyz.local.

From abc.local i can ping xyz.local by name like ping abc.local, but when i try to ping from xyz.local to abc.local it wont ping it times out but i can ping by ip address.

I beleive this is given me problems setting up my trust between the two domains.

I am new to DNS so any help would be great to get this working.