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Specifications
This guide and other XP documentation refers to the XP's Layer-2 (L2), Layer-3 (L3), and
Layer-4 (L4) switching and routing. These layers are based on the International Standards
Organization (ISO) 7-layer reference model. Here is an example of that model. The XP
operates within the layers that are not shaded. Notice that Layer 2 is divided into an LLC
layer and a MAC layer. The XP operates at the MAC layer but not the LLC layer.
Layer 7
Layer 6
Layer 5
Layer 4
Layer 3
Layer 2
Layer 2
Layer 1
TCP/UDP Services
The following table lists some well-known TCP/UDP services provided by the XP.
TCP Port
23
4
Application
Presentation
Session
TCP/UDP - application
IP/IPX - routing
LLC
MAC -bridging
Physical Interfaces
UDP Port
Description
Telnet
161
SNMP
67
BOOTP/DHCP Relay Agent
520
Routed
Enterasys Xpedition 8000/8600 Getting Started Guide
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