Alcatel-Lucent OmniAccess 5740 - Configure Logical Interface

Configure
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OmniAccess 5740 Unified Services Gateway Web GUI Users Guide
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ONFIGURE LOGICAL INTERFACE
Follow the procedure below to configure logical interfaces.
You can configure Virtual LAN, Tunnel (GRE/IPSec), Loopback, MLPPP and
MLFR interfaces.
Step 1: Click Add Logical Interface on the Interfaces page. A drop-down list
lists the logical interfaces that can be configured: Virtual LAN/GRE Tunnel/
Loopback. Choose the required option.
A
DD VIRTUAL LAN (VLAN)
You can configure VLAN on L2GE Switch ports. L2GE card has 8 Switch Ports
and VLAN on L2 ports can be configured for three modes of operation.
• Access - This is the default mode. Used to connect end stations (LAN devices) to
switch ports. Each access port can belong to only 1 VLAN. This port can send and
receive untagged packets.
• Trunk - A trunk port sends and receives only tagged packets. It interconnects one
OmniAccess 5740 USG (as a switch) to another OmniAccess 5740 USG (as a
router). VLAN information is exchanged between them.
• Hybrid - Used to connect to both VLAN-aware (tagged) devices as well as VLAN
unaware (untagged) devices.
Some points to note:
• By default, all the L2 Switch Ports are in Access mode and they are a part of
VLAN 1 (already configured in the device).
• If a VLAN is configured on a particular L2 card, it cannot be configured on another
card.
• VLAN can be configured for a L2 card and not across L2 cards (i.e, if your device
has more than one L2 card). For routing across VLANs or between traffic on the
L2 card, IRB (Integrated Routing and Bridging) is to be used. This enables L2 port
capable of taking part in both bridging and routing at the same time.
IRB allows multiple router interfaces to be in a common VLAN, with routing
across such VLAN's.
• A given VLAN interface for IRB can be used only on the 8 ports of the same L2-
GE card.
• If IRB is not enabled for a VLAN interface, policies cannot be configured.
• When no VLANs are configured on the L2 ports, all ports of the switch belong to
one broadcast domain. All the L2 ports participate in pure bridging.