Media Modules; Layer 3 And Layer 2 Fast Ethernet Modules - Lucent Technologies Cajun P220 Operation Manual

Cajun P550 Switch Overview
Figure 1-2 illustrates a conceptual diagram of the Layer 3 supervisor module's functions.

Media Modules

All Layer 2 and Layer 3 media modules have full non-blocking performance.
Bridging and routing are performed on the input side of each media module.
Each media module features:
IEEE 802.3z full-duplex flow control - This allows the switch ports to send a
pause command before input buffers overflow. Half-duplex ports support active
backpressure (jamming).
VLAN trunking or non-tagged access modes - This allows the switch ports to
interoperate with popular tagged trunking schemes used by large networking
vendors.
Priority Queuing and Class of Service - These features allow you to prioritize
traffic between particular stations or sets of stations to support jitter-sensitive
applications. Supported class of service types: 3Com PACE CoS, IEEE 802.1p CoS.

Layer 3 and Layer 2 Fast Ethernet Modules

The Layer 2 (L2) and Layer 3 (L3) Fast Ethernet modules include:
20-Port 10/100Base-TX Ethernet Module (L2 support), with 20 RJ-45 Ports -
10/100, HDX/FDX
10-Port 100Base-FX Ethernet Module (L2 support), with 10 Fast Ethernet Ports -
Fiber, 1300 nM, HDX/FDX
1-4
Figure 1-2. Layer 3 Supervisor Module Conceptual Operation
Wirespeed Routing
High- in Hardware
Speed
Software-based
Access
To /
High-speed
From
CPU
Switch
Fabric
Routing Table and
Cache Management
Multilayer Supervisor Conceptual Diagram
Manage-
ment
Routing
Inter-
System
faces
management
Cajun P550/P220 Switch Operation Guide