Cisco Cisco IOS Software Release 12.2(2)XA
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System Requirements
OL-1645-01 Rev CO
System Requirements
System Requirements
This section describes the system requirements for Cisco IOS Release 12.2(2)XA4 and includes the
following sections:
following sections:
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Memory Recommendations
lists the minimum memory recommendations for Cisco IOS Release 12.2(2)XA4 for the
Cisco uBR905 and Cisco uBR925 cable access routers.
Headend Interoperability
DOCSIS Concatenation
If DOCSIS concatenation with a 16-QAM (quadrature amplitude modulation) symbol rate is used, the
CMTS must be configured for Unique Word 16 in the preamble for both short and long data burst
profiles. On the Cisco uBR7200 series universal broadband routers, use the cable modulation-profile
global configuration command and specify uw16 for both the long and short modulation profiles.
CMTS must be configured for Unique Word 16 in the preamble for both short and long data burst
profiles. On the Cisco uBR7200 series universal broadband routers, use the cable modulation-profile
global configuration command and specify uw16 for both the long and short modulation profiles.
DOCSIS 1.0+ Extensions
Cisco IOS Release 12.2(2)XA4 images support the Cisco DOCSIS 1.0+ Extensions, which include
dynamic multi-SID assignment and concatenation. To use the dynamic multi-SID and concatenation
features, the Cisco uBR905 and Cisco uBR925 cable access routers and the CMTS router must support
them. If you are using a Cisco CMTS router as the headend equipment, Cisco IOS Release 12.1(1)T or
a later release is required on the Cisco CMTS router to ensure that these features are activated.
dynamic multi-SID assignment and concatenation. To use the dynamic multi-SID and concatenation
features, the Cisco uBR905 and Cisco uBR925 cable access routers and the CMTS router must support
them. If you are using a Cisco CMTS router as the headend equipment, Cisco IOS Release 12.1(1)T or
a later release is required on the Cisco CMTS router to ensure that these features are activated.
To configure the Cisco uBR905 and Cisco uBR925 cable access routers to support multiple classes of
service, use either the Cisco Subscriber Registration Center (CSRC) tool or the configuration file editor
of your choice. DOCSIS configuration files can contain multiple classes of service (CoS) to support
service, use either the Cisco Subscriber Registration Center (CSRC) tool or the configuration file editor
of your choice. DOCSIS configuration files can contain multiple classes of service (CoS) to support
Table 2
Cisco IOS Release 12.2(2)XA Memory Recommendations
Feature Set
Image Name
Recommended
Flash Memory
Flash Memory
Recommended
DRAM Memory
DRAM Memory
Runs from
Perf Small Office/Voice/FW IPSec 3DES
ubr925-k9o3sv4y5-mz
8 MB
24 MB
RAM
Perf Telecommuter/Voice IPSec 3DES
ubr925-k9sv4y5-mz
8 MB
24 MB
RAM
Value Small Office/Voice/FW IPSec 56
ubr925-k8o3sv4y5-mz
8 MB
24 MB
RAM
Value Telecommuter/Voice IPSec 56
ubr925-k8sv4y5-mz
8 MB
24 MB
RAM