Running Version 2.14.1.lenovo2 on RHEL 7.4.
I have the following "external" network defined:

Object name: DLS
    domain=domain.net
    gateway=192.168.100.254
    mask=255.255.255.0
    mgtifname=eno1
    nameservers=192.168.100.1
    net=192.168.100.0

site.forwarders = 192.168.100.1
site.domain=cluster.domain.net

resolv.conf has the MN as the nameserver:

domain cluster.domain.net
search cluster.comain.net domain.net
nameserver 172.23.100.10

... And for the most part, everything works except reverse lookup for IPs not 
managed by this DNS server:

host mn01
mn01.cluster.domain.net has address 172.23.100.10
host 172.23.100.11
11.100.23.172.in-addr.arpa domain name pointer n01.cluster.domain.net.

host compnode01.domain.net
compnode01.domain.net has address of 192.168.100.11

host 192.168.100.10
host 192.168.100.10.in-addr-arpa. not found: 3(NXDOMAIN)

host 192.168.100.10 192.168.100.1
Using domain server:
Name: 192.168.100.1
Address: 192.168.100.1#53
Aliases:

192.168.100.10.in-addr.arpa domain name pointer mgt01.domain.net

So, if I give it the remote DNS server, the reverse lookup works. Using the 
xCAT MN, reverse lookup only works for internal IPs.

Regards,
Christian Caruthers
Lenovo Professional Services
Mobile: 757-289-9872

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