Odd A record in our hosts zone file

[Bruce Johnson]

I ran across these A records in one of our zone files:

;EXCHANGE STUFF
mail            1m      IN      A       xxx.xxx.xxx.52; dhbex1
mail            1m      IN      A       xxx.xxx.xxx.54; dhbex2

I can see that this is a cheap load-balancing for our exchange OWA servers, but what is the ‘1m’ notation? I haven’t been able to find that in my searching of the manual.

(We’re adding new servers and I need to make sure our DNS is properly set for them.)

-- 
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs