Ip Interface Configuration Commands - Avaya G350 Administration

•
Switching Interface — An internal 100Mbps connection to the G350 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 G350 without an external VPN or firewall, Vlan 1 is used to connect the
internal G350 router to the internal G350 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.
•
GRE tunnel — A GRE tunnel is a virtual point-to-point link between two routers at two ends of
an Internet cloud. GRE tunneling encapsulates packets and sends them over a GRE tunnel. At the
end of the GRE tunnel, the encapsulation is removed and the packet is sent to its destination in the
network at the far end of the GRE tunnel. For more information, see
on page 139.
Layer 2 logical interfaces
•
VLAN (on the Switching Interface) — The G350 switch can have multiple VLANs defined
within its switching fabric. The G350 router supports up to eight VLANs that can be configured
over its internal switching interface connection.
•
Serial Interface — A serial interface is a virtual interface that is created over a portion of an
E1/T1 or USP port. Serial interfaces support PPP and frame relay encapsulation protocols. For
more information about configuring serial interfaces for a WAN, see
on page 74.
NOTE:
One or more IP interfaces can be defined over each serial, Fast Ethernet, switching, and
Loopback interface.

IP Interface configuration commands

To configure an interface:
1
To create an interface, type the
create. Some types of interfaces require an identifier as a parameter. Other types of interfaces
require the interface's module and port number as a parameter. For example:
interface vlan 1
interface serial 2/1
2
Use the
to the interface. Use the
Use the following commands to configure the interface parameters. For more information about these
commands, see Avaya G350 Media Gateway CLI Reference, 555-245-202.
Administration of the Avaya G350 Media Gateway
June 2004
interface
command, followed by an IP address and subnet mask, to assign an IP address
ip address
form of this command to delete the IP interface.
no
command, followed by the type of interface you want to
Configuring the router
Configuring interfaces
Configuring GRE tunneling
Initial WAN configuration
135