Table Of Contents
Getting Started with the VG248
Accessing Configuration Options
Committing the Changes to the Static IP Settings
Setting DSCP Quality of Service Values
Setting the HTTP Server Auto-Refresh
Configuring the Login Password
Configuring the Enable Password
Configuring Contact Information
Configuring Trap Receiver Stations
Getting Started with the VG248
Before you can configure the telephony features on the VG248 to interact with the analog phones, you must first configure the basic network, SNMP, and password settings. These settings enable the VG248 to connect to the IP network and help you manage the device.
These sections provide details about configuring these settings on the VG248:
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Accessing Configuration Options
Accessing Configuration Options
You can access the VG248 configuration options, after the device has started up, using a console terminal connected to the RJ-45 console port or through a Telnet session.
Using the Console Port
You might want to use the console port to connect to the VG248 when you initially install the device. This enables you to observe the initial startup procedure and manually assign an IP address and host name if you are not using DHCP.
Procedure
To access the VG248 through the console RJ-45 port, perform these steps.
Using Telnet
To access the VG248 through a Telnet session, you must know its IP address or host name. By default, the device uses DHCP. If you want to assign a specific IP address or host name, you must first configure the network settings using the console port before connecting through a Telnet session.
Procedure
To access the VG248 from a remote host with Telnet, perform these steps:
Displaying the Main Menu
After connecting to the VG248 through the console port or a Telnet session, the main menu appears (see Figure 2-1). Follow these guidelines to navigate the menus:
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Figure 2-1 VG248 Main Menu
Restarting the VG248
Although not required for configuration, you should restart the VG248 after upgrading or downgrading the software.
Procedure
To restart the VG248, perform these steps:
Step 1
Step 2
Configuring Network Settings
You must configure the network settings on the VG248 to connect it to the IP network.
These sections describe the configurable network settings on the VG248:
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Setting the Host Name
The host name identifies each VG248 on your TCP/IP network, enabling you to access the device using this name rather than the IP address. By default, this value is set to be the same as the device name registered in the Cisco CallManager database. This device name is a unique character string generated based on the MAC address for the VG248 (see the "Adding the VG248 to Cisco CallManager" section on page 5-1).
Procedure
To set the host name, perform these steps:
Step 1
Step 2
Step 3
Step 4
Configuring Ethernet
The VG248 fully supports 10/100 Mbps half- and full-duplex Ethernet. If you choose auto-negotiation, the VG248 automatically negotiates the speed and duplex mode with the switch to which it is attached; this is the default setting. The switch port used by the VG248 should also be set to auto-negotiation.
Procedure
Follow these steps to configure the VG248 as your network requires:
Step 1
Step 2
Step 3
Step 4
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Using DHCP
If you are using Dynamic Host Configuration Protocol (DHCP) in your network, the VG248 automatically obtains an IP address when you connect it to the network. Although the VG248 uses DHCP by default, you can disable DHCP and manually assign an IP address to the VG248.
Before You Begin
If you do not use DHCP, you must enter the additional network settings. See the "Assigning a Static IP Address" section for details:
Procedure
To use DHCP, perform these steps:
Step 1
Step 2
Step 3
Step 4
Renewing IP Address from DHCP
You might need to renew the IP address automatically assigned to the VG248. For example, if you have changed the physical location of the VG248 from one subnet to another or if you need assistance troubleshooting a connectivity problem.
Procedure
To renew an IP address assigned by DHCP, follow these steps:
Step 1
Step 2
Step 3
Assigning a Static IP Address
Rather than using DHCP to obtain an IP address, you can assign a static IP address to the VG248. You can also change any of these settings even if you are using DHCP in your network. To assign a static IP address, you must manually assign several network settings described in these sections:
Setting the IP Address
The IP address identifies each VG248 on your TCP/IP network. You must enter the IP address if you are not using DHCP. The VG248 automatically obtains an IP address if you are using DHCP.
Before You Begin
An asterisk (*) appears next to any setting that you have changed until you commit the changes. See the"Committing the Changes to the Static IP Settings" section for details.
Procedure
To assign an IP address, perform these steps:
Step 1
Step 2
Step 3
Step 4
Step 5
Setting the Subnet Mask
You must enter the subnet mask if you are not using DHCP. The VG248 automatically obtains a subnet mask if you are using DHCP.
Before You Begin
An asterisk (*) appears next to any setting that you have changed until you commit the changes. See the"Committing the Changes to the Static IP Settings" section for details.
Procedure
To set the subnet mask, perform these steps:
Step 1
Step 2
Step 3
Step 4
Step 5
Setting the Default Router
You must enter the default router if you are not using DHCP. The VG248 automatically obtains a default router if you are using DHCP.
Before You Begin
An asterisk (*) appears next to any setting that you have changed until you commit the changes. See the"Committing the Changes to the Static IP Settings" section for details.
Procedure
To set the default router, perform these steps:
Step 1
Step 2
Step 3
Step 4
Step 5
Setting the DNS Server
Domain Name System (DNS) allows users to specify remote computers by host names. The VG248 uses DNS to resolve the host name of TFTP servers and Cisco CallManager systems when the system is configured to use names rather than IP addresses.
Before You Begin
An asterisk (*) appears next to any setting that you have changed until you commit the changes. See the"Committing the Changes to the Static IP Settings" section for details.
Procedure
To set the DNS server, perform these steps:
Step 1
Step 2
Step 3
Step 4
Step 5
Tips
Setting the Domain Name
The domain name is the name of the Domain Name System (DNS) domain in which the VG248 is located.
Before You Begin
An asterisk (*) appears next to any setting that you have changed until you commit the changes. See the"Committing the Changes to the Static IP Settings" section for details.
Procedure
To set the domain name, perform these steps:
Step 1
Step 2
Step 3
Step 4
Step 5
Committing the Changes to the Static IP Settings
After making any changes to the static IP settings, you must commit the changes to apply them. Keep in mind that depending on the changes made, you might lose connectivity to the IP network.
Tip
Procedure
Follow these steps to accept the changes you've made:
Step 1
Step 2
Step 3
Step 4
Enabling CDP
The VG248 can advertise itself to other network devices using Cisco Discovery Protocol (CDP). Many network management applications require that CDP is enabled.
Procedure
To enable CDP, perform these steps:
Step 1
Step 2
Step 3
Step 4
Setting DSCP Quality of Service Values
Differentiated Services Code Point (DSCP) is an IETF standard that uses six bits in the IPv4 header's Type of Service (ToS) field to specify the class of service for each packet. You can modify the assigned DSCP Quality of Service (QoS) value for certain types of traffic. This enables you to give priority to media traffic over control traffic.
Procedure
To enable modify the DSCP QoS values, perform these steps:
Step 1
Step 2
Step 3
Step 4
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Step 5
Step 6
Disabling the HTTP Server
HTTP access to the VG248 is enabled by default. To enhance security, you may wish to disable HTTP access to the VG248.
Procedure
To disable HTTP access to the VG248, perform these steps:
Step 1
Step 2
Step 3
Step 4
Setting the HTTP Server Auto-Refresh
You can set the HTTP server to automatically refresh, at a specified interval, the web pages that show VG248 port status information. The refresh features allows you to view the VG248 port status during the defined interval without having to continually press the browser's refresh button. Web pages that are refreshed are Home; Configuration Status - Network and System; Port Status; Statistics - Network; Statistics - Voicemail; Environment; and Event Log.
You set the HTTP auto-refresh by specifying in the HTTP server interval field the number of seconds between the automatic refresh of the web pages. If you do not want the HTTP server to refresh the web pages, leave the HTTP server interval field set to disabled, the default.
Procedure
To enable HTTP auto-refresh on the VG248, perform these steps:
Step 1
Step 2
Step 3
Step 4
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Step 5
Configuring Passwords
The VG248 ships without a set or enabled password. You should enable passwords to prevent unauthorized access to and control of the VG248. The VG248 does not support or use user names.
Caution
Once you set a password, however, the VG248 requires that you use it, whether you are accessing the device using the console port, telnet, HTTP, or FTP. When using the HTTP, you are required to enter the login password if one is set; you cannot modify any settings when accessing the VG248 using HTTP. When accessing the VG248 using FTP, the FTP server adopts the highest level of security currently set. For example, if you have set both a login and enable password, you must use the enable password to use FTP.
Configuring the Login Password
The login password enables you or other users to view the current status of the VG248.
Procedure
To configure the login password, perform these steps:
Step 1
Step 2
Step 3
Step 4
Configuring the Enable Password
The enable password allows you to view current settings and make changes to the VG248. Once set, you must use the enable password to make changes to the VG248.
Procedure
To configure the enable password, perform these steps:
Step 1
Step 2
Step 3
Step 4
Configuring SNMP Settings
The VG248 supports Simple Network Management Protocol (SNMP) by supporting standard MIBs. Modify the SNMP settings as appropriate for your network management needs. You need to configure the SNMP settings if you want to manage the VG248 remotely.
Setting Community Strings
The community string settings enable network management systems to access the VG248 for remote management.
You can configure a read-only password, which restricts access to the device, allowing users to view information but not to make changes. You can also configure a read-write community string, which allows users to make changes to the device remotely.
By default, the read-only community string is set to
public, which provides read-only access. If you do not set these community strings on the VG248, you cannot manage the device remotely using the Simple Network Management Protocol (SNMP).Procedure
To set the community strings, perform these steps:
Step 1
Step 2
Step 3
Step 4
Step 5
Configuring Contact Information
You can enter the contact name of the person responsible for the VG248 and the location of the VG248 on your campus.
Configuring Contact Name
The contact name on the VG248 corresponds to the sysContact variable defined in RFC 1213.
Procedure
To add a contact name indicating the person responsible for the VG248, perform these steps:
Step 1
Step 2
Step 3
Step 4
Configuring System Name
The system name on the VG248 corresponds to the sysName variable defined in RFC 1213.
Procedure
To specify the system name of the VG248 to the network management system perform these steps:
Step 1
Step 2
Step 3
Step 4
Configuring Location
The location on the VG248 corresponds to the sysLocation variable defined in RFC 1213.
Procedure
To add the location of the VG248 in your network or on your site, perform these steps:
Step 1
Step 2
Step 3
Step 4
Configuring Trap Settings
You can configure the VG248 to notify up to four network management systems when certain significant system events occur. You can also specify the IP address for the network management system that is acting as a trap receiver. See the "Understanding Trap Support" section on page 1-25 for information about supported trap types.
Enabling Authentication Traps
Procedure
To enable authentication traps, perform these steps:
Step 1
Step 2
Step 3
Step 4
Configuring Trap Receiver Stations
Procedure
To set up to four trap receiver stations, perform these steps:
Step 1
Step 2
Step 3
Step 4
