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Chapter 1 Overview
2 Cajun P333T User’s Guide
Layer 2 Features
Auto-Negotiation
Every 10/100 port on the Cajun P330 supports Auto-Negotiation which
automatically detects and supports the operating mode and speed of a connected
device. Auto-negotiation is also supported on the Gigabit Ethernet ports for flow
control mode only.
This means that you can simply connect the Cajun P330 to Ethernet or Fast
Ethernet equipment at full or half duplex without configuration.
Congestion Control
Congestion control is a key element of maintaining network efficiency as it
prevents resource overload.
The Lucent Cajun P330 supports congestion control on all Ethernet ports, using the
following:
• Back Pressure in half duplex mode
• IEEE 802.3x Flow Control in full duplex mode
VLANs
The Cajun P330 VLANs are fully IEEE 802.1Q compliant and can handle up to 3k
tagged VLANs.
Special VLAN (Virtual Sideband) for management provides physical security for key
applications.
Link Aggregation Group (LAG)
LAG provides increased bandwidth and redundancy for critical high-bandwidth
applications such as inter-stack links and connections to servers. You can aggregate
the bandwidth of up to eight 10/100Base-Tx ports, two 100Base-FX or 1000Base-X
ports.
Load sharing ensures that if one of the port connections fails, the other connections
will assume the load seamlessly. Load balancing guarantees that the traffic load at
any level will be evenly divided among all the LAG links.
LAG and Port Redundancy
Redundancy can be implemented between any two ports in the same stack. You
can also assign redundancy between any two LAGs in the stack or between a LAG
and a port.