Chapter 1 Sip And Spa Product Overview; Introduction To Sips And Spas - Cisco ASR 1000 Series 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
Figure 1-2
Caution SIP subslot 0 is not available on the Cisco ASR 1002 Router as that is the slot occupied by the integrated
Route Processor with native Gigabit Ethernet ports.
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Cisco ASR 1000 Series Aggregation Services Routers 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.
Some SPAs provide services rather than network connectivity, and can be inserted into the subslots
of a compatible SIP, for example, the Cisco WebEx Node for ASR 1000 Series that provides WebEx
meeting services, and the DSP SPA that provides voice transcoding and transrating capabilities.
SPAs are available in the following sizes, as shown in
– Single-height SPA—Inserts into one SIP subslot.
– Double-height SPA—Inserts into two single, vertically aligned SIP subslots.
Single-Height and Double-Height SPA Sizes
Front of SIP
Single-height SPA
Double-height SPA
Horizontal and Vertical Chassis Slot Orientation for SPAs
Front of SIP, horizontal chassis slots
SPA 0
SPA 2
SPA 0
Double-height SPA
SPA 0
SPA 2 Double-height SPA
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 command-line
interface (CLI).
SPA 1
SPA 3
SPA 1
SPA 3
SPA 1
Chapter 1 SIP and SPA Product Overview
Figure 1-1 and Figure 1-2:
Vertical slot orientation
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