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Release Notes for Cisco uBR904 Cable Access Router for Cisco IOS Release 11.3 NA 7

Important Notes

• attributes of the cable access router MAC interface

• status of several MAC layer counters

The RFI MIB includes tables describing both the CMTS and the cable modem side of the cable

interface. All cable modem tables are implemented.

Routing (RIP V2)

A routing conﬁguration for the Cisco uBR904 cable access router is most likely used when the cable

access router is being added to an existing personal computer network. If set to support routing

mode, the Cisco uBR904 cable access router will automatically conﬁgure the headend’s IP address

as its IP default gateway. When the IP host-routing is being conﬁgured, this automatic conﬁguration

of the headend’s IP address as its IP default gateway will allow the Cisco uBR904 cable access router

to send packets not intended for the Ethernet interface to the headend.

RIP V2 routing is useful for small internetworks in that it enables optimization of NIC-assigned IP

addresses by deﬁning VLSMs for network addresses, and it allows CIDR addressing schema.

Important Notes

The following section contains important notes about Cisco IOS Release 11.3 that may apply to the

Cisco uBR904.

ATM Multipoint Signaling

Prior to Cisco IOS Release 11.1(13) and 11.2(8), the atm multipoint-signaling command was used

on the main interface and affected all subinterfaces. For Release 11.1(13), 11.2(8), and later releases

(including Release 11.3), explicit conﬁguration on each subinterface is required to obtain the same

functionality. See caveat CSCdj20944, which is described as follows:

The atm multipoint-signaling interface command is currently only available on the main ATM

interface. The effect is that signaling behavior (point-to-point or point-to-multipoint) for all clients

on all subinterfaces is determined by the command on the main interface.

Clients on different subinterfaces can have different behavior. Speciﬁcally, RFC 1577 requires

point-to-point, and PIM allows point-to-multipoint. The command should be on a per-subinterface

basis.

Enable the atm multipoint-signaling command on all subinterfaces that require it. Previously, you

only needed to enable the command on the main interface.

Cisco IOS Release 11.3, 11.3 NA and 11.3 T End of Sales and End of

Engineering

End of Engineering (EOE) means there are no more regularly scheduled maintenance releases. The

following maintenance releases scheduled on the EOE date are only available through CCO and

Field Service Operations—not through manufacturing:

• Cisco IOS Releases 11.3, 11.3 NA, and 11.3 T are scheduled to reach End of Sales (EOS) status

with maintenance Releases 11.3(10), 11.3(10)NA, and 11.3(10)T.

• Releases 11.3, 11.3 NA, and 11.3 T are scheduled to reach EOE with Releases 11.3(11),

11.3(11)NA, and 11.3(11)T.

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