3-4
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Hardware Installation Guide
OL-14126-12
Chapter 3 Overview: Cisco ASR 1000 Series Aggregation Services Routers SPAs
Bandwidth Oversubscription
Checking Hardware and Software Compatibility
To check the minimum software requirements of Cisco IOS software with the hardware installed on your
router, Cisco maintains the Software Advisor tool on Cisco.com. This tool does not verify whether SIPs
or SPAs within a system are compatible, but it does provide the minimum Cisco IOS requirements for
individual hardware modules or components.
Note Access to this tool is limited to users with Cisco.com login accounts.
To access Software Advisor, click Login at Cisco.com, type “Software Advisor” in the SEARCH box,
and click GO. Click the link for the Software Advisor tool.
Choose a product family or enter a specific product number to search for the minimum supported
software release needed for your hardware.
Bandwidth Oversubscription
Oversubscribing the bandwidth limit recommendations of a router can result in decreased or degraded
performance. For this reason, it is important to determine the amount of bandwidth used by the SPAs on
the router and verify that the total bandwidth used by all SPAs does not exceed the recommended
bandwidth limit of the router.
Table 3-2 provides information about the bandwidth for each port (per-port bandwidth) on a SPA and the
cumulative bandwidth (total bandwidth) for all ports available on the SPA.
4-Port Clear Channel T3/E3 SPA SPA-4XT3/E3 4 Cisco
IOS XE 2.1
1.0
4-Port Serial SPA SPA-4XT-Serial 4 Cisco
IOS XE 2.1
1.0
Service SPAs
Cisco WebEx Node for ASR
1000 Series
SPA-WMA-K9 N/A Cisco
IOS XE 2.4
1.0
Cisco DSP SPA for ASR 1000
Series
SPA-DSP N/A Cisco IOS XE
3.2S
1.0
CEOP (Circuit Emulation Over Packet) SPA
1-Port Channelized OC3/STM-1
ATM and Circuit Emulation SPA
SPA-1CHOC3-CE-ATM 1 Cisco IOS XE
3.3.0S
1.0
2-Port Channelized T3/E3 ATM
CEoP SPA
SPA-2CHT3-CE-ATM 2 Cisco IOS XE
3.4.0S
1.0
24-Port Channelized T1/E1 ATM
CEoP SPA
SPA-24CHT1-CE-ATM 24 Cisco IOS XE
3.4.0S
1.0
Table 3-1 SPA Summary (continued)
SPA Product Number Number
of Ports
Minimum
IOS XE
Release
Minimum
Hardware
Revision
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