Shared Port Adapters - Cisco CRS-1 - Carrier Routing System Router Hardware Installation Manual

Introduction to SIPs and SPAs

Shared Port Adapters

The following list describes some of the general characteristics of a SPA:
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Figure 1-1
Single-height SPA
Figure 1-2
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Cisco CRS-1 Carrier Routing System SIP and SPA Hardware Installation Guide
1-2
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 and the SPA size.
SPAs are available in the following sizes, as shown in
Single-height SPA—Inserts into one SIP subslot.
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– Double-height SPA—Inserts into two single, vertically aligned SIP subslots.
Single-Height and Double-Height SPA Sizes
Front of SIP
Double-height SPA
Subslot Numbering for SPAs
Each SPA provides a certain number of connectors, or ports, that are the interfaces to one or more
networks. These interfaces can be individually configured using the Cisco IOS XR software
command-line interface (CLI).
Chapter 1
Figure 1-1 and
Single-height SPA
SIP and SPA Product Overview
Figure 1-2:
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