Layer 2 Switching Configuration
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OmniAccess 5740 Unified Services Gateway CLI Configuration Guide
Alcatel-Lucent
ALCATEL-LUCENT SPECIFIC OVERVIEW ON SWITCHING
The schematic below is the L2-GE Front Panel view of the RJ-45 connector.
Figure 7: L2-GE Front Panel View of the RJ-45 Connector
• Each L2 card consist of eight ports.
• L2 interface can be configured for four modes of operation, namely:
i. Pure bridging mode - Packets are bridged across other switchports of pure
bridging mode based on the mac-address table, without considering the
VLAN tag information.
ii. Access - Used to connect end stations (LAN devices) to switch ports. Each
access port can belong to a VLAN. This port can send and receive untagged
packets.
iii. Trunk - A trunk port sends and receives only tagged packets.
iv. Hybrid - These ports are used to connect both VLAN-aware (tagged) devices
as well as VLAN-unaware (untagged) devices.
• The default VLAN-id is VLAN-1.
• Supports software bridging, VLAN can be configured on any number of line cards.
• If VLAN spreads across the line cards, line rate switching can not be achieved.
• All interfaces are by default in the “shutdown” mode. You have to administratively
bring them up by using the command “no shutdown”.
• Native VLANs are applicable only for hybrid modes.
• The mode of the interface can be set by using the command “switchport mode
trunk / hybrid”. If this command is not issued and if the interface is configured
with access VLAN configuration, then the interface will be set to “access mode”.
• If an interface has both access and trunk configuration, the interface can be set to
trunk mode by using the command “switchport mode trunk”.
• Similarly, if an interface has both access and hybrid configuration, the interface
can be set to hybrid mode by issuing the command “switchport mode hybrid”.
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