Upgrade Guide for Cisco Unity Connection Release 8.x
Renaming Cisco Unity Connection 8.x Servers
Downloads: This chapterpdf (PDF - 178.0KB) | Feedback

Table of Contents

Renaming Cisco Unity Connection 8.x Servers

Task List for Renaming a Single 8.x Server Without a Unity Connection Cluster

Changing the Hostname of a Single 8.x Server Without a Unity Connection Cluster

Task List for Renaming the Publisher Server in a Unity Connection 8.x Cluster

Changing the Hostname of the Publisher Server in a Unity Connection 8.x Cluster

Task List for Renaming the Subscriber Server in a Unity Connection 8.x Cluster

Changing the Hostname of the Subscriber Server in a Unity Connection 8.x Cluster

Renaming a Unity Connection 8.x Site Gateway in a Cisco Voicemail Organization

Renaming Cisco Unity Connection 8.x Servers

This chapter contains the following sections:

We recommend not to use “ciscounity” keyword in the hostname of the publisher and subscriber in a cluster to avoid cluster installation issues.

Task List for Renaming a Single 8.x Server Without a Unity Connection Cluster

Revised April 16, 2010


Caution When Unity Connection is installed on a virtual machine, the MAC address is calculated based in part on the hostname and the SMTP domain. Changing the hostname or the SMTP domain also requires getting new Connection licenses that contain the new MAC address. For more information, see the “Managing Licenses in Cisco Unity Connection 8.x” chapter in the System Administration Guide for Cisco Unity Connection Release 8.x at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html.

1. If you created and installed an SSL certificate on the server that you are renaming : Create a new certificate signing request, and get a new signed certificate before you begin to rename the server.


Note If you do not get a new signed certificate before you rename the server, when you use web applications to access the Unity Connection server, a security alert displays and explains that there is a problem with the security certificate.


a. Run the CLI command set web-security to assign an alternate hostname to the server that you are renaming. For more information, see the applicable Command Line Interface Reference Guide for Cisco Unified Communications Solutions at http://www.cisco.com/en/US/products/ps6509/prod_maintenance_guides_list.html .

b. Create a certificate signing request. Then download the certificate signing request to the server on which you installed Microsoft Certificate Services or another application that issues certificates, or download the request to a server that you can use to send the certificate signing request to an external certification authority (CA). Do the “To Create and Download a Certificate Signing Request” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

c. If you are using Microsoft Certificate Services to export the root certificate and issue the server certificate, do the “To Export the Root Certificate and Issue the Server Certificate (Only When You Are Using Microsoft Certificate Services to Issue the Certificate)” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

If you are using another application to issue the certificate, see the documentation for the application for information on issuing certificates.

If you are using an external CA to issue the certificate, send the certificate signing request to the external CA. When the external CA returns the certificate, continue with Step 2.

2. If the server that you are renaming is a member server in a Unity Connection networking site (the server is not a site gateway): Remove the server from the site. See the “Removing a Location From a Cisco Unity Connection 8.x Site” section in the “Making Changes to the Networking Configuration in Cisco Unity Connection 8.x” chapter of the Networking Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/networking/guide/8xcucnetx.html .

3. Change the hostname of the server. See the “Changing the Hostname of a Single 8.x Server Without a Unity Connection Cluster” section.

4. If you created and installed an SSL certificate on the server that you are renaming : Upload the root certificate and the server certificate to the Unity Connection server. Do the “To Upload the Root and Server Certificates to the Cisco Unity Connection Server” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

5. If you created and installed an SSL certificate on the server that you are renaming : Restart the Unity Connection IMAP Server service so that Unity Connection and the IMAP email clients use the new SSL certificates. Do the “To Restart the Unity Connection IMAP Server Service” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

6. If the server was a member server in a Unity Connection networking site before you renamed the server : Re-add the server to the site. See the “Setting up a Cisco Unity Connection Site” section in the “Setting Up Networking Between Cisco Unity Connection 8.x Servers” chapter of the Networking Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/networking/guide/8xcucnetx.html .


Note Verify that replication between locations in the site has completed before continuing with the rest of the task list.


7. If Unity Connection is installed on a virtual machine: Get and install new licenses based on the new hostname. For more information, see the “Managing Licenses in Cisco Unity Connection 8.x” chapter in the System Administration Guide for Cisco Unity Connection Release 8.x at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

8. Back up the server by using the Disaster Recovery System. See the Disaster Recovery System Administration Guide for Cisco Unity Connection Release 8.x at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/drs_administration/guide/8xcucdrsag.html .

Changing the Hostname of a Single 8.x Server Without a Unity Connection Cluster

Revised December 10, 2013

To Change the Hostname of a Single 8.x Server Without a Unity Connection Cluster


Step 1 On a DNS server, change the DNS record of the Unity Connection server to the new hostname.

Step 2 Confirm that the DNS change propagates to the server. Sign in to the server by using an SSH application, and run the CLI command utils network host <hostname> .

Do not proceed if the new hostname does not resolve to the correct IP address.

Step 3 Optional: On the Unity Connection server, change the SMTP domain in Cisco Unity Connection Administration:

a. Expand System Settings > SMTP Configuration , and select Server .

b. Select Change SMTP Domain , and change the value of the SMTP Domain field.

c. Select Save .


Note Make sure Unity Connection is not in the same SMTP domain as the Exchange server that communicates with it.


Step 4 In Connection Administration, change the hostname of the server:

a. Expand System Settings , and select Cluster .

b. Select Find to display a list of servers.

c. Select the hostname of the server that you want to rename.

d. On the Server Configuration page, change the value of the Hostname/IP Address field to the new name.

e. Select Save .

Step 5 Optional: In Connection Administration, change the networking display name of the server:

a. Expand Networking , and select Locations .

b. Select the display name of the server that you want to rename.

c. On the Edit Location page, change the value of the Display Name field to the new name. (This field is for display purpose only and need not match the server hostname.)

d. Select Save .

Step 6 In Cisco Unified Operating System Administration, change the hostname of the server:

a. From the Settings menu, select IP > Ethernet .

b. Change the hostname of the Unity Connection server.

c. Select Save . The server automatically restarts.


 

Task List for Renaming the Publisher Server in a Unity Connection 8.x Cluster

Revised April 16, 2010


Caution When Unity Connection is installed on a virtual machine, the MAC address is calculated based in part on the hostname and the SMTP domain. Changing the hostname or the SMTP domain also requires getting new Connection licenses that contain the new MAC address. For more information, see the “Managing Licenses in Cisco Unity Connection 8.x” chapter in the System Administration Guide for Cisco Unity Connection Release 8.x at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html.

The following procedure uses the CLI command set web-security to specify the new server name as the alternate host name for the server. This allows you to continue using the original name for the server while you send the certificate signing request (which will contain both the current name and the new, alternate name) to a certificate authority and wait for the certificate to be returned. If you want to use SSL, and if you want to use the CLI command set web-security to specify a shared alternate name to the two servers in a cluster, you can omit Task 1.a., and you can do the remainder of Task 1.a. after you rename the server, in Task 3. (When the two servers have a shared alternate name, you can configure DNS to automatically reroute client requests to the other server when one server is unavailable.) However, until you install the new certificate, clients will receive certificate warnings because the name of the server does not match the name in the old SSL certificate.

1. If you created and installed an SSL certificate on the server that you are renaming : Create a new certificate signing request, and get a new signed certificate before you begin to rename the server.


Note If you do not get a new signed certificate before you rename the server, when you use web applications to access the Unity Connection server, a security alert displays and explains that there is a problem with the security certificate.


a. Run the CLI command set web-security and, for the alternatehostname parameter, specify the new name for the server. For more information, see the applicable Command Line Interface Reference Guide for Cisco Unified Communications Solutions at http://www.cisco.com/en/US/products/ps6509/prod_maintenance_guides_list.html .

b. Create a certificate signing request. Then download the certificate signing request to the server on which you installed Microsoft Certificate Services or another application that issues certificates, or download the request to a server that you can use to send the certificate signing request to an external certification authority (CA). Do the “To Create and Download a Certificate Signing Request” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

c. If you are using Microsoft Certificate Services to export the root certificate and issue the server certificate, do the “To Export the Root Certificate and Issue the Server Certificate (Only When You Are Using Microsoft Certificate Services to Issue the Certificate)” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

If you are using another application to issue the certificate, see the documentation for the application for information on issuing certificates.

If you are using an external CA to issue the certificate, send the certificate signing request to the external CA. When the external CA returns the certificate, continue with Step 2.

2. If the server that you are renaming is a member server in a Unity Connection networking site (the server is not a site gateway): Remove the server from the site. See the “Removing a Location From a Cisco Unity Connection 8.x Site” section in the “Making Changes to the Networking Configuration in Cisco Unity Connection8.x” chapter of the Networking Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/networking/guide/8xcucnetx.html .


Caution Re-adding a server to a site can be a time-consuming process. Ensure that you thoroughly understand the work required to re-add a server to a site before you begin this procedure.

3. Change the hostname of the server. See the “Changing the Hostname of the Publisher Server in a Unity Connection 8.x Cluster” section.

4. If you created and installed an SSL certificate on the server that you are renaming : Upload the root certificate and the server certificate to the Unity Connection server. Do the “To Upload the Root and Server Certificates to the Cisco Unity Connection Server” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

5. If you created and installed an SSL certificate on the server that you are renaming : Restart the Unity Connection IMAP Server service so that Unity Connection and the IMAP email clients use the new SSL certificates. Do the “To Restart the Unity Connection IMAP Server Service” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

6. If the server was a member server in a Unity Connection networking site before you renamed the server : Re-add the server to the site. See the “Setting up a Cisco Unity Connection Site” section in the “Setting Up Networking Between Cisco Unity Connection 8.x Servers” chapter of the Networking Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/networking/guide/8xcucnetx.html .

7. If Unity Connection is installed on a virtual machine: Get and install new licenses based on the new hostname. For more information, see the “Managing Licenses in Cisco Unity Connection 8.x” chapter in the System Administration Guide for Cisco Unity Connection Release 8.x at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

8. Back up the server by using the Disaster Recovery System. See the Disaster Recovery System Administration Guide for Cisco Unity Connection Release 8.x at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/drs_administration/guide/8xcucdrsag.html .

Changing the Hostname of the Publisher Server in a Unity Connection 8.x Cluster

Revised November 26, 2013

To Change the Hostname of the Publisher Server in a Unity Connection 8.x Cluster


Step 1 On a DNS server, change the DNS record of the publisher server to the new hostname.

Step 2 Confirm that the DNS change propagates to the publisher server. Sign in to the publisher server by using an SSH application, and run the CLI command utils network host <hostname> .

Do not proceed if the new hostname does not resolve to the correct IP address.

Step 3 Repeat Step 2 on the subscriber server.

Step 4 Optional: On the publisher server, change the SMTP domain in Cisco Unity Connection Administration (this change is automatically replicated to the subscriber server):

a. Expand System Settings > SMTP Configuration , and select Server .

b. Select Change SMTP Domain , and change the value of the SMTP Domain field.

c. Select Save .


Note Make sure Unity Connection is not in the same SMTP domain as the Exchange server that communicates with it.


Step 5 On the publisher server, change the hostname of the publisher server in Connection Administration:

a. Expand System Settings , and select Cluster .

b. Select Find to display a list of servers.

c. Select the hostname of the server that you want to rename.

d. On the Server Configuration page, change the value of the Hostname/IP Address field to the new name.

e. Select Save .

Step 6 Optional: On the publisher server, change the networking display name of the server in Connection Administration:

a. Expand Networking , and select Locations .

b. Select the display name of the server that you want to rename.

c. On the Edit Location page, change the value of the Display Name field to the new name. (This field is for display purpose only and need not match the server hostname.)

d. Select Save .

Step 7 On the subscriber server, change the name by which the subscriber server knows the publisher server:

a. In Cisco Unified Operating System Administration, from the Settings menu, select IP > Publisher .

b. Change the hostname of the publisher server.

c. Select Save .

Sign in to the subscriber server by using an SSH application, and run the CLI command utils system restart to restart the server.

Step 8 On the publisher server, change the name of the publisher server in Cisco Unified Operating System Administration.

a. From the Settings menu, select IP > Ethernet .

b. Change the hostname of the publisher server.

c. Select Save . The publisher server automatically restarts.

d. Wait for the publisher server to finish restarting. When you can sign in to Connection Administration on the publisher server, continue with Step 9.

Step 9 Sign in to the subscriber server by using an SSH application, and run the CLI command utils system restart to restart the server.

Step 10 Wait for the subscriber server to finish restarting. When you can sign in to Connection Administration on the subscriber server, continue with Step 11.

Step 11 On the publisher server, run the CLI command utils dbreplication reset all to reset replication.


Note On all the publisher and subscriber servers, run the CLI command utils dbreplication stop before running the utils dbreplication reset all command. For more information, see the applicable secion in the Command Line Interface Reference Guide for Cisco Unified Communications Solutions guide: http://www.cisco.com/en/US/products/ps6509/prod_maintenance_guides_list.html.


Step 12 Wait until the replication reset process is complete. To determine when the process is completed:

a. Sign in to Real-Time Monitoring Tool (RTMT) by connecting to the publisher server.

b. On the System menu, select Performance > Open Performance Monitoring .

c. In the right pane, expand Number of Replicates Created and State of Replication , then double-click Replicate_State .

d. In the Object Instances dialog box, select ReplicateCount and select Add .

e. Wait until the value reaches 2.0 .

For more information on possible values and their meaning, right-click Replicate_State , and select Counter Description .

f. On the File menu, select Exit to exit RTMT.

Step 13 Sign in to the publisher server by using an SSH application, and run the CLI command utils system restart to restart the server.

This command causes the Unity Connection cluster servers to change server status so the publisher server has the Secondary status and the subscriber server has the Primary status.

Step 14 Run the CLI command utils cuc cluster makeprimary <name_of_publisher_server> to change the publisher server to Primary status.


 

Task List for Renaming the Subscriber Server in a Unity Connection 8.x Cluster

Revised April 16, 2010


Caution When Unity Connection is installed on a virtual machine, the MAC address is calculated based in part on the hostname and the SMTP domain. Changing the hostname or the SMTP domain also requires getting new Connection licenses that contain the new MAC address. For more information, see the “Managing Licenses in Cisco Unity Connection 8.x” chapter in the System Administration Guide for Cisco Unity Connection Release 8.x at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html.

The following procedure uses the CLI command set web-security to specify the new server name as the alternate host name for the server. This allows you to continue using the original name for the server while you send the certificate signing request (which will contain both the current name and the new, alternate name) to a certificate authority and wait for the certificate to be returned. If you want to use SSL, and if you want to use the CLI command set web-security to specify a shared alternate name to the two servers in a cluster, you can omit Task 1.a., and you can do the remainder of Task 1.a. after you rename the server, in Task 2. (When the two servers have a shared alternate name, you can configure DNS to automatically reroute client requests to the other server when one server is unavailable.) However, until you install the new certificate, clients will receive certificate warnings because the name of the server does not match the name in the old SSL certificate.

1. If you created and installed an SSL certificate on the server that you are renaming : Create a new certificate signing request, and get a new signed certificate before you begin to rename the server.


Note If you do not get a new signed certificate before you rename the server, when you use web applications to access the Unity Connection server, a security alert displays and explains that there is a problem with the security certificate.


a. Run the CLI command set web-security and, for the alternatehostname parameter, specify the new name for the server. For more information, see the applicable Command Line Interface Reference Guide for Cisco Unified Communications Solutions at http://www.cisco.com/en/US/products/ps6509/prod_maintenance_guides_list.html .

b. Create a certificate signing request. Then download the certificate signing request to the server on which you installed Microsoft Certificate Services or another application that issues certificates, or download the request to a server that you can use to send the certificate signing request to an external certification authority (CA). Do the “To Create and Download a Certificate Signing Request” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

c. If you are using Microsoft Certificate Services to export the root certificate and issue the server certificate, do the “To Export the Root Certificate and Issue the Server Certificate (Only When You Are Using Microsoft Certificate Services to Issue the Certificate)” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

If you are using another application to issue the certificate, see the documentation for the application for information on issuing certificates.

If you are using an external CA to issue the certificate, send the certificate signing request to the external CA.

2. Change the hostname of the server. See the “Changing the Hostname of the Subscriber Server in a Unity Connection 8.x Cluster” section.

3. If you created and installed an SSL certificate on the server that you are renaming : Upload the root certificate and the server certificate to the Unity Connection server. Do the “To Upload the Root and Server Certificates to the Cisco Unity Connection Server” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

4. If you created and installed an SSL certificate on the server that you are renaming : Restart the Unity Connection IMAP Server service so that Unity Connection and the IMAP email clients use the new SSL certificates. Do the “To Restart the Unity Connection IMAP Server Service” procedure in the “Creating and Installing an SSL Server Certificate” subsection in the “Securing Cisco PCA and IMAP Email Client Access to Cisco Unity Connection” section in the “Configuring SSL in Cisco Unity Connection 8.x” chapter of the System Administration Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

5. If Unity Connection is installed on a virtual machine: Get and install new licenses based on the new hostname. For more information, see the “Managing Licenses in Cisco Unity Connection 8.x” chapter in the System Administration Guide for Cisco Unity Connection Release 8.x at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/administration/guide/8xcucsagx.html .

6. Back up the server by using the Disaster Recovery System. See the Disaster Recovery System Administration Guide for Cisco Unity Connection Release 8.x at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/drs_administration/guide/8xcucdrsag.html .

Changing the Hostname of the Subscriber Server in a Unity Connection 8.x Cluster

To Change the Hostname of the Subscriber Server in a Unity Connection 8.x Cluster


Step 1 On a DNS server, change the DNS record of the subscriber server to the new hostname.

Step 2 Confirm that the DNS change propagates to the publisher server. Sign in to the publisher server by using an SSH application, and run the CLI command utils network host <hostname> .

Do not proceed if the new hostname does not resolve to the correct IP address.

Step 3 Repeat Step 2 on the subscriber server.

Step 4 On the publisher server, change the name by which the publisher server knows the subscriber server:

a. In Cisco Unity Connection Administration, expand System Settings , and select Cluster .

b. Select Find to display a list of servers.

c. Select the hostname of the subscriber server.

d. On the Server Configuration page, change the value of the Hostname/IP Address field to the new name.

Step 5 On the subscriber server, change the name of the subscriber server in Cisco Unified Operating System Administration.

a. From the Settings menu, select IP > Ethernet .

b. Change the hostname of the subscriber server.

c. Select Save . The subscriber server automatically restarts.

Step 6 Sign in to the publisher server by using an SSH application, and run the CLI command utils system restart to restart the server.

Step 7 On the publisher server, run the CLI command utils dbreplication reset all to reset replication.

Step 8 Sign in to the publisher server by using an SSH application, and run the CLI command utils system restart to restart the server a second time.


 

Renaming a Unity Connection 8.x Site Gateway in a Cisco Voicemail Organization

For information on replacing a Unity Connection site gateway when Connection networking is configured, see the “Making Changes to a Unity Connection Site Gateway” section in the “Making Changes to the Networking Configuration in Cisco Unity Connection 8.x” chapter of the Networking Guide for Cisco Unity Connection at http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/networking/guide/8xcucnetx.html .