CHAPTER
3-1
Cisco 7304 Router Modular Services Card and Shared Port Adapter Hardware Installation Guide
OL-4681-01
3
Overview: Cisco 7304 Router Shared Port
Adapters
This chapter describes the shared port adapters (SPAs) that are supported on the Cisco 7304 router and
contains the following sections:
• SPA Summary, page 3-1
• Bandwidth Oversubscription, page 3-2
• FastEthernet SPA Overview, page 3-2
• GigabitEthernet SPA Overview, page 3-5
• OC-3 POS SPA Overview, page 3-10
• OC-12 POS SPA Overview, page 3-13
• T3/E3 Serial SPA Overview, page 3-16
SPA Summary
Summary descriptions of the SPAs that are supported on the Cisco 7304 router are shown in Table 3-1.
Table 3-1 SPA Summary for Cisco 7304 Routers
SPA Product Number Description
Number
of Ports
Minimum Cisco IOS
Release
FastEthernet SPA SPA-4FE-7304 4-port 10/100
FastEthernet SPA
4 Release 12.2(20)S2
GigabitEthernet
SPA
SPA-2GE-7304 2-port 10/100/1000
GigabitEthernet SPA
2 Release 12.2(20)S2
OC-3 SPA SPA-2XOC3-POS 2-Port OC-3c/STM-1
POS SPA
2 Release 12.2(25)S3
OC-3 SPA SPA-4XOC3-POS 4-Port OC-3c/STM-1
POS SPA
4 Release 12.2(25)S3
OC-12 SPA SPA-1OC12-POS 1-Port OC-12c/STM-4
POS SPA
1 Release 12.2(25)S3
T3/E3 Serial SPA SPA-2XT3/E3 2-Port T3/E3 Serial SPA 2 Release 12.2(25)S3
T3/E3 Serial SPA SPA-4XT3/E3 4-Port T3/E3 Serial SPA 4 Release 12.2(25)S3
