"Ethy H. Brito" <ethy.brito@xxxxxxxxxxxx> writes: > Hi All > > Before I moved to XDP cpumap bandwidth control "philosophy" I used to snoop inside the htb classes (mainly the default one) mirroring traffic to a dummy interface then run tcpdump on that like: > > tc filter add dev eth0 parent 1: protocol all prio 0xffff \ > u32 match u32 0 0 flowid 1:$shp action mirred egress mirror dev dummy0 > > Then "tcpdump -npi dummy0" used to show me all that classid "1:$shp" was carrying. > > Now, with the multi queue environment XDP creates, I can't make mirroring to work. > For instance: I need to see what is going on with HTB classid e:102, so I tried: > > tc filter add dev eth0 parent e: ... e:102 action mirred egress ... > > and "tcpdump -npi dummy0" prints traffic that has nothing to do with classid e:102. > I can confirm the traffic is pored thru the class since its bandwidth is > controlled/limited correctly. The xdp-cpumap-tc utility will attach a filter to the egress interface, presumably that is taking priority and short-circuit your mirred filter? -Toke
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