Configuring the router
Router interface concepts
The router in the Avaya G450 Media Gateway includes the following interface categories:
Physical
●
Layer 2 virtual
●
Layer 3 routing
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Physical router interfaces
The following are the physical interfaces of the G450 router:
WAN Interfaces. When you add a WAN media module to the Avaya G450 Media
●
Gateway, the media module provides a WAN interface. You can add one of the following
types of WAN media modules:
- The Avaya MM340 media module provides an E1/T1 WAN interface
- The Avaya MM342 media module provides a USP WAN interface
FastEthernet Interface. The
●
G450 provide a FastEthernet interface. This interface is an autosensing 10/100 Mbps Fast
Ethernet port. It can be used to connect to a LAN, an external firewall, an external Virtual
Private Network (VPN), or a DeMilitarized Zone (DMZ). This interface can also be used as
a WAN interface when configured for PPPoE. For more information, see
PPPoE
Switching Interface. An internal 100 Mbps connection to the G450 internal switch
●
provides a switching interface. The switching interface supports VLANs. By default, the
switching interface is associated with the first VLAN (Vlan 1).
When you configure the G450 without an external VPN or firewall, Vlan 1 is used to
connect the internal G450 router to the internal G450 switch. If an external firewall or VPN
is connected to the Fast Ethernet port, it is important to disable Vlan 1 to prevent a direct
flow of packets from the WAN to the LAN.
Layer 2 virtual interfaces
Loopback. The Loopback interface is a virtual Layer 2 interface over which loopback IP
●
addresses are configured. The Loopback interface represents the router by an IP address
that is always available, a feature necessary mainly for network troubleshooting.
Since the Loopback interface is not connected to any physical interface, an entry in the
routing table can not have the Loopback interface's subnet as its next hop.
444 Administration for the Avaya G450 Media Gateway
on page 259.
Fast Ethernet ports on the front panel of the
10/2 and 10/4
Configuring