We have added two R6 server into cluster.Only one server is sending SMTP messages to the internet.The cluster communicates for cluster replication and for probes on the dedicated private LAN which uses a cross GigaBit Ethernet connction.The problem is when the cluster is up and running the outgoing SMTP messages are accumulated on the mail.box returning the error message “Unable to connect to SMTP host *****.com server not responding check the DNS configuration” but the DNS resolver works nicely when you enter the NSLOOKUP command on the command line…how can I solve this…
Subject: R6 Cluster stops DNS querries
Got the same thing. It occurs because you have to setup the CLUSTER TCP PORT to be use in priority on normal TCPIP PORT for the cluster to use it for replication.but by doing this, all TCP protocols are binded on this port (ldap, smtp, pop, …)
Solution :
Put in your notes.ini on your 2 servers, a line SMTPNotesPort= port name
this will do it (see in Admin help : Binding an Internet service to an IP address)
Note that http has to binded in the server conf. document, as well as notes RPC (tcp 1352)
Subject: RE: R6 Cluster stops DNS querries
I just had the exact same problem, but in my case, I alsredy had the INI settings Patrick suggested.
My issue was in Windows 2000 itself…the “binding order” of the two NICs was such that the first card in the list was the one on the private LAN (crossover cable) and, being the first in the list, was the one that Windows was using for DNS.
To fix it, go to the Network properties where you see your two cards, click on the Advanced menu, choose Advanced Settings, and change the priority so that your public LAN card is the first NIC in the binding list.
The other thing I did, is turn off NETBIOS on the private NIC.
Hope that helps!