Installation guide
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Release Notes for Cisco uBR7200 Series for Cisco IOS Release 12.1 T
78-10643-04 Rev. B0
New and Changed Information
Frame Relay features include the following:
• Cisco and IETF encapsulation
• Cisco, ANSI, and ITU LMI with auto-sensing
• UNI DTE, DCE, and NNI
• Inverse ARP
• Traffic Shaping
• Adaptive Shaping using BECN
• Broadcast Queue
• CDP over FR
• TCP/IP Header Compression
• RTP Header Compression
• Cisco and IETF MIBs
• Syslog Trap Alert for DLCI loss
• Weighted Fair Queuing at the interface level based on DLCI classification
• DLCI IP RTP priority support
Interface Command Enhancements
Several Cisco IOS cable interface commands have been enhanced:
• The show controller cx/0 upstream number and show interface cx/0 upstream number
commands display the following additional statistic counters:
–
Average percent of upstream utilization in minislots
–
Average percent of contention slots
–
Average percent of initial ranging slots
–
Average percent of minislots that were due because the MAP scheduler was not able to request
them in time
• The show interface cx/0 sid [ number ] counters command now supports a verbose option that
displays two additional statistics:
–
Number of bandwidth requests successfully received by the Cisco uBR7200 Series Universal
Broadband Router from the specified SID on the specified cable interface
–
Number of grants issued by the Cisco uBR7200 Series Universal Broadband Router to the
specified SID
• The show cable flap-list and show cable modem commands now indicate when the
Cisco uBR7200 Series Universal Broadband Router has detected an unstable return path for a
particular modem and has compensated with a power adjustment. An asterisk appears in the power
adjustment field for a modem when a power adjustment has been made; an exclamation point
appears when the modem has reached its maximum power transmit level and cannot increase its
power level any further.
• Other power adjustment changes have been made to the cable upstream power-adjust command
to allow the Cisco uBR7200 series router to better adjust when a cable modem seems to “bounce”
(the modem requires frequent power adjustments in opposite directions). When this situation