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user762750
Asked: 2019-07-17 02:07:57 +0800 CST

Where can I place tc filters?

  • 772

I have a raspberry pi router for me and my room mates. The bandwidth is divided as follow: 

         1:0(htb)
            |
         1:1(16mbit/s)
          /   \
1:2(8mbit/s) 1:ffff(8mbit/s)

If I add the filter for with parent 1:0 (tc filter add dev wlan0 parent 1:0 protocol ip prio 1 handle 0x0002 fw flowid 1:2), it works like a charm. However, if I add the filter upon class 1:1 the command didn't report any errors but there is no ouput for tc filter show dev wlan0 command.

Questions:
1. Why it didn't work when I put the filters on 1:1?
2. Can I place the filters on subclasses like 1:1?

networking

1 Answers

  1. Best Answer

    1. The filters are attached to root of ingress queue discipline, not to classes. So in your case all filters should be created with parent 1:0 option.

    2. To pass the traffic through classes you should create a filter with flowid ... or classid ... options for every class. So, in your case the filters should be looks like (if I've understood you correctly):

    tc filter add dev wlan0 parent 1:0 protocol ip prio 1 handle 0x0002 fw flowid 1:2
tc filter add dev wlan0 parent 1:0 protocol ip prio 2 handle 0xffff fw flowid 1:ffff
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