Installation guide

Release Notes for Cisco uBR7200 Series for Cisco IOS Release 12.1 T

78-10643-04 Rev. B0

Caveats

• CSCdp85836

Spectrum Management task used many CPU cycles and caused CPU utilization to increase. This is

resolved in Cisco IOS Release 12.1(2)T.

• CSCdp82100

If VRFs were configured on cable subinterfaces and cable dhcp-giaddr policy was configured on

the subinterface, then primary addresses configured on the cable subinterface were used for CMs

and secondary address hosts. During testing, it was found that the giaddr was set to the primary

address for both CMs and hosts.

If there was no VRF configured, then it behaved correctly. This is resolved in Cisco IOS

Release 12.1(2)T.

• CSCdp78309

In Cisco IOS Release 12.1 T, the definition of 'k1' images for the Cisco uBR9xx series was

changed from BPI support only to include SSH support. This change caused an inconsistency with

Cisco uBR7200 images, since the definition of 'k1' images for the Cisco uBR7200 was not changed

and does not include SSH. The definition of 'k1' images for the Cisco uBR7200 must therefore be

updated to include SSH, in all release trains supporting SSH. This is resolved in Cisco IOS

Release 12.1(2)T.

Open Caveats for Cable-Specific Functionality for Release 12.1(1a)T1

This section describes possibly unexpected behavior for cable-specific features for Cisco IOS

Release 12.1(1a)T1.

Note The caveats for the wireless modem card are listed in the separate section, “Open Caveats

for Wireless Modem Card Functionality for Release 12.1(1a)T1” on page 46.

• CSCdm68421

If a POS interface starts receiving incoming traffic while a Cisco uBR7246 or uBR7246 VXR

router is still booting, the router stops booting until the incoming traffic stops. The workaround is

to prevent any incoming traffic from coming into a POS interface until the router finishes its bootup

process. (This problem can also occur on a Cisco 7200 series router.)

• CSCdm92017 and CSCdp20117

If the show controller command is entered during online insertion and removal (OIR) of a cable

modem line card or port adapter, the Cisco uBR7200 series router can crash and must be reloaded

to recover. The workaround is to avoid entering CLI commands while physically removing and

inserting a cable modem line card or port adapter. (This problem can also occur on other routers.)

• CSCdp18494

When noise with a minimum frequency of 0.2 MHz at an amplitude greater than 20 dBmV occurs

on an upstream channel on an MC16S Cable Modem Card, noise can also occur at the center

frequency harmonics. This affects the MC16S card’s ability to analyze the noise levels on the

different upstream channels.