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Cisco Bug: CSCvj10951 - RF management traffic overutilization

Last Modified

Dec 10, 2018

Products (1)

  • Cisco cBR Series Converged Broadband Routers

Known Affected Releases


Description (partial)

Current management traffic rate can be found out by subtracting User traffic rate (Mbps) from total MPEG traffic rate (Mbps) from 'show controller integrated-Cable <  > counter rf-channel' .   It appears CBR8 is sending 4 to 10Mbps more management traffic than it requires.

For instance, from following example, only four upstream channels are configured for 6/0/0 and management traffic rates for RF channel 1 and 15 are 14.47 Mbps (32.21 - 17.74==14.47) and  14.13Mbps (37.91 - 23.78 == 14.13) respectively. 

In compared with other interfaces that are having four upstream channels  and showing around 4 to 5 Mbps of normal management traffic rate, around 10Mbps of more management traffic is being sent on 6/0/0.

CBR8#show controllers integrated-Cable 6/0/0  counter rf-channel
Controller  RF    MPEG       MPEG        MPEG   Sync       MAP/UCD    User
            Chan  Packets    bps         Mbps   Packets    Packets    Mbps
                  Tx                            Tx         Tx
6/0/0       1     336355185113 32218817   32.21   2609065148 78001856960 17.74
6/0/0     15    220927364727 37917945   37.91   1296173526 51843147291 23.78

Many UGS-AD service flows. And the upstream channel is busy. Swtich UGS-AD service between UGS-AD poll and UGS-AD grant frequently.
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