Novell GROUPWISE 7 - MULTI-SYSTEM ADMINISTRATION, Manual

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Using Dynamic Internet Links 19
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Host Name (column 1): Use the host name assigned to the MTA’s server. In the above example,
corp, gwdev, and gwsupport are the host names assigned to three MTA servers.
Class (column 2): Use IN to represent the Internet.
Type (column 3): Use A to specify an address record.
IP Address (column 4): Use the IP address assigned to the MTA’s server.
2.4.2 Creating the Service ("SRV") or Text ("TXT") Record
You can use either service records or text records to map your Internet domain names to MTAs. The
following text shows sample "SRV" and "TXT" records:
;
; Service ("SRV") records
;
gwmtp.tcp.novell.com 172800 IN SRV 1 0 7100 corp.serv.novl
gwmtp.tcp.groupwise
IN SRV 1 1 7100 corp.serv.novl
gwmtp.tcp.groupwise IN SRV 1 2 7100 gwdev.serv.novl
gwmtp.tcp.support 172800 IN SRV 1 0 7100 gwsup.serv.novl
gwmtp.tcp.support 172800 IN SRV 2 0 7100 corp.serv.novl
;
; Text ("TXT") records
;
gwmtp.tcp.novell.com 172800 IN TXT "1 0 7100 corp.serv.novl"
gwmtp.tcp.groupwise
IN TXT "1 1 7100 corp.serv.novl"
gwmtp.tcp.groupwise IN TXT "1 2 7100 gwdev.serv.novl"
gwmtp.tcp.support 172800 IN TXT "1 0 7100 gwsup.serv.novl"
gwmtp.tcp.support 172800 IN TXT "2 0 7100 corp.serv.novl"
Service.Protocol.Name (column 1): The service must be specified as
gwmtp
. The protocol must
be specified as
tcp
. The name corresponds to the Internet domain name you want associated with
the MTA. In the above sample, novell.com, groupwise.novell.com, and support.novell.com are the
Internet domain names defined in GroupWise.
Time to Live (column 2): TTL (time to live) is the amount of time the record is cached in memory
so it doesn’t need to be looked up again. TTL is specified in seconds. In the above sample, 172800
represents 2 days. If you don’t specify a TTL, the record is not cached.
Class (column 3): Enter
IN
to represent the Internet.
Type (column 4): Enter
SRV
to specify a service record. Enter
TXT
to specify a text record.
Priority (column 5): If an Internet domain name is associated with two different MTAs, the host
with the lowest value is always contacted first. For example, a host with priority 1 is contacted
before a host with priority 2. If two records with the same Internet domain name have the same
priority, the weight number is used. In the above example, the two groupwise.novell.com records
have the same priority, so the weight would be used.
Weight (column 6): The weight number specifies how to allocate connections among hosts with
equal priorities. In the groupwise.novell.com record above, the
corp.serv.novl
host and the
gwdev.serv.novl
host have equal priorities, but the
corp.serv.novl
host has a weight of 1
and the
gwdev.serv.novl
host has a weight of 2. This means that 1 out of 3 times the