# Layer 2 (L2) Switch (CXi II, MXe III, and AX only)

## Purpose

NOTE: The Layer 2 (L2) Switch form is not applicable to MiVoice Business for Industry Standard Servers (ISS).

The Layer 2 (L2) Switch form is used to program global settings and to configure the Ethernet ports for the Layer 2 switch. This form is used for the CXi II, MXe III, and AX controllers.

On the CXi II the first 16 L2 ports are the powered 10/100 Base-T/TX LAN ports, and the 17th port is the unpowered 10/100/1GB Base-T LAN port. The powered ports on the CXi II are designed for connection of IP phones but can also support PCs. The unpowered port is designed for connection to another Layer 2 switch which can be used to boost the total number of connected IP phones to 64. The unpowered port can also support an IP phone or PC. The "Tag VLAN 1 on Trunk Ports" setting is used to enable 802.1p/ Q VLAN tagging for VLAN 1 on this port.

The MXe III has two 10/100/1GB Base-T LAN ports; the AX has two 10/100 Base-T LAN ports. On these controllers, these ports are unpowered. These ports are used to connect to access L2 switches, which in turn are used to connect IP phones. The "Tag VLAN 1 on Trunk Ports" setting is used to enable 802.1p/ Q VLAN tagging for VLAN 1 on these ports.

NOTE: For information on how to configure a Layer 2 (L2) switch, see Chapter 2 Initial Setup > Establish Communication with Controller > Configure the Layer 2 Switch in the MiVoice Business Technician's Handbook document.

Use this form when performing the following tasks:

- Set Up Your System

## Field Descriptions

Parameter | Description | Default Value
Layer 2 (L2) Switch
Voice VLAN ID | System-generated, protected field. Shows voice VLAN ID from the System IP Properties form. |
Tag VLAN 1 on Trunk Ports | Select Enabled to enable 802.1p/ Q VLAN tagging for VLAN 1 on the 10/100/1GB Base-T LAN port). Enable this parameter only if a VLAN-capable expansion switch is connected to the port. NOTES This field applies to untagged and VLAN 1 tagged packets only; voice VLAN tagging is always preserved. Normally, only one VLAN is required, the default VLAN 1, which carries both voice and data traffic. Optionally, the system can be programmed to support a Voice VLAN in addition to the default VLAN. Voice packets from MiVoice IP Phones can belong to either the default VLAN or the Voice VLAN. | Disabled (all VLAN tags are removed before being forwarded by the switch).
IGMP Snooping | Select Disabled to disable the IGMP Snooping functionality. IGMP Snooping allows the switch to automatically pass multicast packets to devices that have joined multicast groups. Without this capability, the switch must forward multicast packets to all ports which results in unnecessary overhead traffic on those non-member ports. NOTE: IGMP Snooping interferes with the port-mirroring (sniffer) feature. If IGMP Snooping is enabled and port mirroring is subsequently enabled, IGMP will be automatically disabled while port mirroring is in use. When port mirroring is disabled, IGMP will be re-enabled. | Enabled
Data VLAN Id (CXi II only) | System-generated, protected field. Shows the data VLAN ID from the System IP Properties form. |
L2 Ports
Port | System-generated, protected field. Indicates the number of the port. The default database has two entries for the MXe III. The first 16 entries for the CXi II are for the powered 10/100Base-T/TX LAN ports. The 17th entry for the CXi II and the two for the MXe III are for the unpowered 10/100/1GB Base-T LAN ports. |
State | Select Disabled to disable the port. | Enabled
Speed | Select the operating speed of the port. Options include Auto (auto-negotiate), 10 Mb, and 100 Mb. For 1000 Mb (Gigabit) speed operation on the 10/100/1GB Base-T LAN port), set the speed to Auto, and it will auto-negotiate for the gigabit speed. Manually select a speed only if auto-negotiation fails. | Auto
Duplex Mode | Select the duplex mode of the port. Alternative to the default setting, you can select "Full DX" (simultaneous transmission in both directions) or "Half DX" (transmission in both directions, but only in one direction at a time). Manually select the duplex mode only if auto-negotiation fails. | Auto. (Duplex mode is negotiated between the two end points automatically.)
Flow Control | Select the flow control mode of the port. The default is "Auto"; the port will attempt to negotiate flow control with the other end. Alternatively, you can select "Enabled" (forces the port to use flow control) or "Disabled" (disables flow control on the port). Manually select flow control only if auto-negotiation fails. |
Power over Ethernet | Applies to CXi II only. Select Disabled to disable Power over Ethernet (PoE) for the port. PoE can be left enabled even if the connected device does not require PoE support. NOTES This setting is not applicable to port 17. There is a slight delay before configuration updates take effect within the IP Network forms. | Auto. (Enabled for ports 1-16).
Voice VLAN | Select whether the port is a member of the Voice VLAN configured in the System IP Properties form by choosing one of the following options: Tagged: Tag frames on egress Untagged: Untag frames on egress No: Not a member of this VLAN. NOTE: On ingress, any untagged frames are assigned to the designated untagged VLAN (if one is specified in the System IP Properties form). | Tagged
Data VLAN ID CXi II only) | As per the Voice VLAN ID field but applies to the CXi II Data VLAN. | Tagged