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Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide
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Chapter 1 SIP and SPA Product Overview
Introduction to SIPs and SPAs
SPA Services Cards
The following list describes some of the general characteristics of an SSC:
•
An SSC is a carrier card that inserts into a router slot like a line card. It provides no network
connectivity.
•
An SSC provides one or more subslots, which are used to house one or more SPAs. The supported
SPAs do not provide interface ports for network connectivity, but provide certain services.
•
During normal operation the SSC should reside in the router fully populated either with functional
SPAs in all subslots, or with a blank filler plate (SPA-BLANK=) inserted in all empty subslots.
•
SSCs support online insertion and removal (OIR) with SPAs inserted in their subslots. SPAs also
support OIR and can be inserted or removed independently from the SSC.
•
Cisco IOS Release 12.2(33) SRE adds support for Route Switch Processor 720 10GE to the Cisco
7600 SSC-400.
Shared Port Adapters
The following list describes some of the general characteristics of a SPA:
•
A SPA is a modular type of port adapter that inserts into a subslot of a compatible SIP carrier card
to provide network connectivity and increased interface port density. A SIP can hold one or more
SPAs, depending on the SIP type.
•
Some SPAs provide services rather than network connectivity, and insert into subslots of compatible
SSCs. For example, the IPSec VPN SPA provides services such as IP Security (IPSec)
encryption/decryption, generic routing encapsulation (GRE), and Internet Key Exchange (IKE) key
generation.
•
SPAs are available in the following sizes, as shown in
Figure 1-1
and
Figure 1-2
:
–
Single-height SPA—Inserts into one SIP subslot.
–
Double-height SPA—Inserts into two single, vertically aligned SIP subslots.
Figure 1-1
Single-Height and Double-Height SPA Sizes
Single-height SPA
Double-height SPA
Front of SIP
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