AltocumulusGTM and BIND sub-domain delegation - BIND/MX Record Question
Hi,
This question is really geared more towards my BIND server configuration than the GTM itself, but I'm hoping someone else here has some experience and can help.
In short, I am deploying GTM at two data centers. At each data center, we manage our external DNS with a BIND server (BIND 9.3.6-P1 running on RedHat-9.3.6-4.P1.el5). I want to delegate a sub-domain to GTM ("out.domain.com" in this case).
My problem is when I first configured the zone file on the BIND servers to delegate the sub-domain out.domain.com to GTM, I found that everything worked as expected, except that MX records would fail to answer (see "Configuration that Breaks MX Records" code section below). After some time, I decided to move the two new lines I added for out.domain.com, after the MX record lines, and then everything started working again (see "Configuration the Works for Everything" code section below).
Configuration that Breaks MX Records:
$TTL 1h
@ IN SOA domain.com. hostmaster.domain.com. (
2013120306 ; Serial
8H ; Refresh
2H ; Retry
1W ; Expire
1D ) ; Minimum TTL
IN NS ns1.domain.com.
IN NS ns2.domain.com.
out IN NS site-a-f5.domain.com.
out IN NS site-b-f5.domain.com.
IN MX 0 domain.com.mxlogic.net.
IN MX 1 domain.com.mxlogicmx.net.
; -------- END Routers/Remote Access/Name Servers (2-10) --------
ns1 IN A 1.1.1.1
ns2 IN A 2.2.2.2
site-a-f5 IN A 8.8.8.8
site-b-f5 IN A 9.9.9.9
; -------- F5 GTM --------
gtmtest IN CNAME gtmtest.out.domain.com. Configuration the Works for Everything:
$TTL 1h
@ IN SOA domain.com. hostmaster.domain.com. (
2013120306 ; Serial
8H ; Refresh
2H ; Retry
1W ; Expire
1D ) ; Minimum TTL
IN NS ns1.domain.com.
IN NS ns2.domain.com.
IN MX 0 domain.com.mxlogic.net.
IN MX 1 domain.com.mxlogicmx.net.
out IN NS site-a-f5.domain.com.
out IN NS site-b-f5.domain.com.
; -------- END Routers/Remote Access/Name Servers (2-10) --------
ns1 IN A 1.1.1.1
ns2 IN A 2.2.2.2
site-a-f5 IN A 8.8.8.8
site-b-f5 IN A 9.9.9.9
; -------- F5 GTM --------
gtmtest IN CNAME gtmtest.out.domain.com. Has anyone experienced this, or can anyone confirm whether or not I should be concerned? It seems odd that the order of the configuration matters for this, but then again, I'm not a BIND expert.
Thanks in advance for any input on the matter, Zac
