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Features
This section describes the following XP features:
•
Address-based and flow-based bridging
•
Port-based VLANs and protocol-based VLANs
•
IP and IPX routing
•
Layer-4 (application) switching
•
Security
•
Quality of Service (QoS)
•
Statistics
•
Management
Bridging
The XP provides the following types of wire-speed bridging:
•
Address-based bridging – The XP performs this type of bridging by looking up the
destination address in an L2 lookup table on the line card that receives the bridge
packet from the network. The L2 lookup table indicates the exit port(s) for the bridged
packet. If the packet is addressed to the XP's own MAC address, the packet is routed
rather than bridged.
•
Flow-based bridging – The XP performs this type of bridging by looking up an entry
in the L2 lookup table containing both the source and destination addresses of the
bridge packet.
Your choice of bridging method does not affect XP performance. However, address-based
bridging is more efficient because it requires fewer table entries while flow-based
bridging provides tighter management and control over bridged traffic.
The XP ports perform address-based bridging by default but can be configured to perform
flow-based bridging, instead of address-based bridging, on a per-port basis. A port cannot
be configured to perform both types of bridging at the same time.
Enterasys Xpedition 8000/8600 Getting Started Guide
Features
5
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