Cisco Cisco Unity Express for SRE

The MGF feature is only available for the following modules:

Cisco SRE ISM

Cisco SRE SM

Cisco Enhanced EtherSwitch Service Module (Cisco SM-ES and Cisco SM-ES-D)

If Cisco EtherSwitch HWIC and Cisco EtherSwitch Network Module are not present in the system, 
no HIMI or VLAN connect is available for Cisco Enhanced EtherSwitch Service Module and SRE. 
You cannot use HIMI or VLAN connect with any Cisco EtherSwitch Service Module module in the 
system.

The maximum number of VLANs is 64, not including the native VLAN.

SMs can only use VLAN 1 as the native VLAN. This native restriction does not apply to 
Cisco Enhanced EtherSwitch Service Modules.

PVDMs cannot communicate with other modules even if they are on the same VLAN. 
Cisco Enhanced EtherSwitch Service Module and Cisco Gigabit EtherSwitch EHWIC ports can 
communicate without external cabling. Only Cisco 1941s support WLAN.

The service-module mgf commands are visible only when the Linux application supports the MGF 
feature. See your Linux application documentation to determine MGF support.

Creating VLANs and storing them in the VLAN database is the same as having a legacy switch 
module like the Cisco EtherSwitch HWIC and/or Cisco EtherSwitch Network Module. 

If your router is running an earlier release of Cisco IOS than Cisco IOS Release 15.2(1)T, 
Online Insertion and Removal (OIR) is not supported by the MGF feature on Cisco SRE  SM, 
Cisco SRE ISM, or Cisco Enhanced EtherSwitch Service Modules. When using one of these earlier 
releases of Cisco IOS, you must reload the router after OIR.

This deployment scenario in which the router has only Cisco SRE SM, Cisco SRE ISM, and/or 
Cisco Enhanced EtherSwitch Service Modules is the most common.

The native VLAN is configured when the SRE MGF port is configured as trunk. The default native 
VLAN is VLAN 1. All VLAN configuration is performed on interface SM slot/1. Multiple IP addresses 
must be assigned to each VLAN. 

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