/LDAPv3/127.0.01 changed to /LDAPv3/10.70.1.135

Yesterday when I left, I was able to do this:

dscl /LDAPv3/127.0.0.1 list /Users

Now I get this:

list: Invalid Path

So I took a look with dscl and I see that the path has changed from /LDAPv3/127.0.0.1 to /LDAPv3/10.70.1.135 (this is the IP of the server). The only thing that has changed between then and now is that one of our DNS servers did not have a PTR record for the server, so I added it. This was one of the DNS servers in /etc/resolv.conf.

I am horrified and mystified. No one can log in. Has anyone else ever seen this before? Any ideas as to what causes it? More importantly, how to fix things such that it NEVER happens again?

Thank you,

Erin