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Old 11-13-2012, 07:22 AM   #1
Rajesh.CB
LQ Newbie
 
Registered: Dec 2011
Posts: 2

Rep: Reputation: Disabled
Certain multicast address not updating the /proc/net/dev counters


Hi all ,

My linux board running a pico chip and pc302_emac driver is not allowing a certain range of Multicast addresses , the counters in /proc/net/dev get updated only for 224.0.0.1 , 224.0.0.65 and other address with +65 .

Any idea how can I get to these counters and who is updating these , for debugging further.

Thanks & regards,
CBR
 
Old 12-03-2012, 09:15 AM   #2
Rajesh.CB
LQ Newbie
 
Registered: Dec 2011
Posts: 2

Original Poster
Rep: Reputation: Disabled
mc_count > 0 , Significance of this flag

Hi all ,

My linux board running a pico chip and pc302_emac driver is not allowing a certain range of Multicast addresses , the counters in /proc/net/dev get updated only for 224.0.0.1 , 224.0.0.65 and other address with +65 .

I put some printfs to debug , and see that , the

dev->flags is set not to IFF_ALLMULTI , instead the code goes to dev->mc_count > 0 , where a sethash table function adds only specific , Multicast addresses are allowed.

I just wanted to know as to , where this dev->mc_count is set ? and what significance does it have .

Thanks & regards,
CBR
 
  


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