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The "mcast" interface counter does not increment with multicast traffic flow.

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Article ID: KB13965 KB Last Updated: 21 Apr 2009Version: 1.0
Summary:
The "mcast" interface counter for multicast traffic is not incrementing with multicast traffic. This counter is not currently used in any ScreenOS release.

Symptoms:
With a ScreenOS firewall configured for and passing multicast traffic, the "get count stat" output continues to show mcast counters at "0" value.
Hardware 64-bit counters for interface ethernet2:
in bytes                  45365731426 |  out bytes                 42217891035
in ucast                    123753852 |  out ucast                   119434043
in mcast                            0 |  out mcast                           0 
in bcast                            0 |  out bcast                           0

Hardware 64-bit counters for interface ethernet3:
in bytes                  37129785208 |  out bytes                  4948911129
in ucast                     85510781 |  out ucast                    29018651
in mcast                            0 |  out mcast                           0 
in bcast                            0 |  out bcast                           0


Solution:
The mcast counters are not currently used in any ScreenOS version (latest release at time of writing is ScreenOS 6.2.0), so these values will always be zero.

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