Cisco Cisco Expressway
Note that:
n
This parameter is a value communicated to Lync clients to affect its operation. To activate this change on a
Lync client, sign out, then sign back into the Lync client.
It may take a while for the parameter to be shared throughout the pool (up to an hour) so you may have to
wait a while before restarting the Lync clients for them take on the new value.
Lync client, sign out, then sign back into the Lync client.
It may take a while for the parameter to be shared throughout the pool (up to an hour) so you may have to
wait a while before restarting the Lync clients for them take on the new value.
n
If the Microsoft Interoperability option key is installed and the connection between the Expressway and
Lync Server is TLS, then the default setting of the command set-CsMediaConfiguration –EncryptionLevel
RequireEncryption may be used. However, be aware that if RequireEncryption is set on Lync, either all
video endpoints must support encryption or the Expressway's Media encryption policy for the relevant
zones and subzones must be set to Force encrypted. Otherwise, calls will fail – consider using
SupportEncryption instead.
Lync Server is TLS, then the default setting of the command set-CsMediaConfiguration –EncryptionLevel
RequireEncryption may be used. However, be aware that if RequireEncryption is set on Lync, either all
video endpoints must support encryption or the Expressway's Media encryption policy for the relevant
zones and subzones must be set to Force encrypted. Otherwise, calls will fail – consider using
SupportEncryption instead.
“Lync gateway” Expressway configuration (part 2)
This comprises the following steps:
1. Configure the B2BUA on the “Lync gateway” Expressway.
2. Set up a search rule to route calls to the Lync domain to Lync.
3. If required, set up search rules to route calls to any other domains supported on Lync (but not in the video
network) to Lync.
Configure the B2BUA on the “Lync gateway” Expressway
When configuring the B2BUA, two of the fields to configure are the destination address and destination port
for the B2BUA to send signaling to in the Lync environment. The values that need to be entered depend on
the structure of the Lync environment:
for the B2BUA to send signaling to in the Lync environment. The values that need to be entered depend on
the structure of the Lync environment:
If the Lync environment…
Configure the signaling destination address
and port to be that of the…
and port to be that of the…
is fronted by a Hardware Load Balancer in front of Lync
Directors
Directors
Hardware Load Balancer
is fronted by a Lync Director or Director pool
Lync Director (pool)
has no Lync Director but a Hardware Load Balancer in
front of Front End Processors
front of Front End Processors
Hardware Load Balancer
is a single FEP
FEP
1. Go to
Applications > B2BUA > Microsoft Lync > Configuration
.
2. Configure the fields as follows:
Microsoft Lync B2BUA
Enabled
Lync signaling destination address
IP address or FQDN of device specified above, for example
dirpool.ciscotp.com
dirpool.ciscotp.com
Lync signaling destination port
IP port used by device specified above – typically 5061
Lync signaling transport
TLS
Microsoft Lync and Cisco Expressway Deployment Guide (X8.1)
Page 32 of 63
Enabling endpoints registered on the video network to call clients registered on Lync