Cisco WS-C2950SX-48-SI Configuration Manual page 68

Understanding How Gigabit Ethernet Works
• WS-X4418-GB
This 1000BASE-X 18-port module provides 2 dedicated uplink module ports (GBIC) and
16 oversubscribed ports (possible blocking).
• WS-X4424-GB-RJ45
This 10/100/100BASE-TX module provides 24 oversubscribed ports (possible blocking).
• WS-X4448-GB-RJ24
This 10/100/100BASE-TX module provides 48 oversubscribed ports (possible blocking).
WS-X4448-LX
•
This Gigabit Ethernet optical line terminator module provides 48 oversubscribed ports (possible
blocking).
On all modules, each uplink module port has 1-Gbps dedicated bandwidth. These ports typically connect
to the network backbone.
Table 5-4
Table 5-4
Module
WS-X4412-2GB-T
WS-X4418-GB
On all modules, the oversubscribed ports are segmented into groups of four ports each. Each group of
four ports shares 1 Gbps of bandwidth. The average bandwidth that clients and servers need to connect
to ports in the same group should not exceed 1 Gbps.
Table 5-5
Table 5-5
1, 2, 3, 4
Table 5-6
Table 5-6
Uplink Port 1
Table 5-7
Table 5-7
1, 2, 3, 4
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide
5-4
lists the uplink module port IDs for each module.
Uplink Port Module IDs for Gigabit Ethernet Modules
Port ID
13 14
1 2
shows how the oversubscribed ports are grouped for module WS-4412-2GB-TX.
Oversubscribed Port Groupings for Module WS-4412-2GB-TX
5, 6, 7, 8 9, 10, 11, 12
shows how the oversubscribed ports are grouped for module WS-4418-2GB.
Oversubscribed Port Groupings for Module WS-4418-2GB
Uplink Port 2 3, 5, 7, 9
shows how the oversubscribed ports are grouped for module WS-X4424-GB-RJ45.
Oversubscribed Port Groupings for Module WS-X4424-GB-RJ45
5, 6, 7, 8 9, 10, 11, 12
Chapter 5 Configuring Gigabit Ethernet Switching
Uplink Ports
(13, 14)
4, 6, 8, 10 11, 13, 15, 17
13, 14, 15, 16 17, 18, 19, 20
—
Release 8.1
12, 14, 16, 18
21, 22, 23, 24
78-15486-01