Cisco uBR924 Specifications download pdf (Page 6)

Release Notes for Cisco uBR924 Cable Access Router for Cisco IOS Release 12.1(5)T

OL-0385-04 Rev. B0 (2/2001)

System Requirements

Note Cisco IOS Release 12.1 T supports fewer software images for the Cisco uBR924 Cable

Access Router than Release 12.0 (which supported 14 separate images). The new

simplified set of software images are a superset of the images supported in the previous

releases, allowing for an easy upgrade path from Release 12.0 to Release 12.1. All of the

images shown in Table 2 support both the Easy IP and Voice feature sets; the IPSec and

Firewall feature sets are supported as shown.

Headend Interoperability

Cisco Cable Clock Card Support

When using Cisco IOS Release 12.1(1)T or greater, the Cisco uBR924 Cable Access Router

automatically supports the Cisco Cable Clock Card feature for voice traffic when the CMTS is a

Cisco uBR7200 series universal broadband router with the Cisco Cable Clock Card feature.

DOCSIS Concatenation

If using DOCSIS concatenation with a 16-QAM (quadrature amplitude modulation) symbol rate, 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. See

caveats CSCdp76415 and CSCdp92139 on page 31 for more detail.

DOCSIS 1.0+ Extensions

Cisco IOS Release 12.1 T 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,

both the Cisco uBR924 router and the CMTS router must support them. If you are using the

Cisco uBR7200 series headend equipment as the CMTS router, Cisco IOS Release 12.0(7)XR,

Release 12.1(1)T, or greater is required on both the Cisco uBR924 Cable Access Router and the CMTS

router to ensure that these features are activated.

Value Small Office—Easy IP,

Voice, FW

, and IPSec 56

ubr920-k1o3v4y556i-mz 4 MB Flash 16 MB DRAM RAM

Performance Small Office—

Easy IP, Voice, FW

, and

IPSec 3DES

ubr920-k1k2o3v4y5-mz 4 MB Flash 16 MB DRAM RAM

1. L2TP is not supported in any Cisco IOS Release 12.1(5)T images for the Cisco uBR924 Cable Access Router.

2. FW—Firewall (Cisco Secure Integrated Software)

Table 2 Memory Recommendations for the Cisco uBR924 Cable Access Router,

Release 12.1(5)T Feature Sets (continued)

Feature Set Matrix Term

Image Name

Minimum

Flash

Memory

Minimum

DRAM

Memory

Runs

From

1 2 3 4 5 6 7 8 9 10 11 ... 41 42

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