·
An A record matching
your Enterprise
pool’s FQDN in the internal DNS to the virtual IP
address of load balancer (or IP address of the
Enterprise
Edition Server if you have a single server pool)
·
An A record that
matches the virtual IP address of the load balancer (or
the IP address of the
Enterprise
Edition Server if you have a single server pool) to the
host name in the internal URL for Web Conferencing
functionality. This A record is required only if during
setup the URL host name is changed from the default (the Enterprise pool FQDN).
·
An
external A record that matches the IP address of the
reverse proxy in the perimeter network to the host name
in the external URL for Web Conferencing functionality
(as described in
Microsoft Office
Communications Server 2007 Edge Server Deployment Guide)
·
A DNS SRV record for each SIP domain that is served by an
Enterprise pool
·
An A record for each
SIP domain that is served by an Enterprise pool
|
Required SRV record to enable automatic
configuration |
Create _sipinternaltls._tcp.domain
srv record with port 5061 and host offering this service
as "poolname or the standard edition server name".
|
Order of the client DNS queries |
·
_sipinternaltls._tcp.domain
- for internal TLS
connections
·
_sipinternal._tcp.domain
- for internal TCP
connections (performed only if
TCP is allowed)
·
_sip._tls.domain - for
external
TLS connections
·
_sip._tcp.domain - for
external
TCP connections
If the first
query succeeds, the client uses that first record and
does not continue querying for any other SRV records.
After the
SRV
record is queried, a query is performed for the DNS A
record for the hostname returned by the
SRV record. If no records are found
during the DNS SRV
query, the client performs an explicit lookup of
sip.domain. If the explicit lookup does not produce
results, the client performs a lookup for
sipinternal.domain. If the client does not find
sipinternal.domain, it performs a lookup for
sipexternal.domain.
|
How to create a DNS SRV record |
Open the DNS management console.
In the console tree for your SIP
domain (If it doesn't exist, create it), expand
Forward Lookup Zones,
and then right-click the SIP domain in which your
Office Communications Server will be installed.
Click Other
New Records.
In Select a
resource record type, click
Service Location (SRV),
and then click Create
Record.
Click
Service, and then type
_sipinternaltls.
Click
Protocol, and then type
_tcp.
Click Port
Number, and then type
5061.
Click Host
offering this service, and then type the
FQDN of the pool.
Click OK.
Click Done.
|
How to create a DNS A record |
Open the DNS management console.
In the console tree for your
domain, expand Forward Lookup
Zones, and then right-click the domain in
which your Office Communications Server will be
installed.
Click New
Host (A).
Click Name
(uses parent domain name if blank), and
then type the name of the pool.
Click IP
Address, and then enter the
VIP of the load balancer. If you will deploy only
one Enterprise Edition Server connected to the
back-end without a load balancer, type the IP
address of the Enterprise Edition Server. (A load
balancer is required if you deploy more than one
Enterprise Edition Server in a pool).Click
Add Host, and then
click OK.
When you are finished creating
all the A records that you need, click
Done.
|
Verify the creation of a DNS SRV record |
1.
Log on to a client
computer in the domain.
2.
Open the Command
prompt.
3.
Type
nslookup, and then press ENTER.
4.
Type
set type=srv, and then press ENTER.
5.
Type
_sipinternaltls._tcp.example.com, and then press
ENTER. The output displayed for the
TLS record
is as follows:
Server: <dns
server>.corp.example.com
Address: <IP
address of DNS server>
Non-authoritative answer:
_sipinternaltls._tcp.example.com
SRV service location:
priority = 0
weight = 0
port = 5061
svr
hostname = poolname.example.com
poolname.example.com internet address = <virtual
IP Address of the load balancer> or <IP address of a
single Enterprise Edition Server for pools with only one
Enterprise Edition Server>
6.
When you are finished,
type exit.
|
Verify you can ping the enterprise pool name |
1.
On a client computer in
the domain, click Start, click
Run, type
cmd, and then press ENTER.
2.
Type
ping <FQDN of the pool>, and then press ENTER.
3.
Verify that you receive
a response similar to the following, where the IP
address returned is the IP address of the load balancer
for your Enterprise pool or, in the
case of an
Enterprise
pool with a single Enterprise Edition Server, the IP
address of the Enterprise Edition Server.
Reply from
172.27.176.117: bytes=32 time<1ms TTL=127
Reply from
172.27.176.117: bytes=32 time<1ms TTL=127
Reply from
172.27.176.117: bytes=32 time<1ms TTL=127
Reply from
172.27.176.117: bytes=32 time<1ms TTL=127
