LARTC - May 2007 - rate limiting netmask w/ dd-wrt

I''m trying to setup a DD-WRT router (www.dd-wrt.com; embedded
micro-device
linux for the uninitiated) to rate limit all the traffic it receives from
its wi-fi interface. I followed the instructions from the cookbook section
on rate limiting (http://lartc.org/howto/lartc.ratelimit.single.html), but
it doesn''t appear to be working. I tested by checking my
laptop''s bandwidth
on http://www.speakeasy.net/speedtest/. Here''s the commands I issued to
tc:

# tc qdisc add dev $DEV root handle 1: cbq avpkt 1000 bandwidth 10mbit
# tc class add dev $DEV parent 1: classid 1:1 cbq rate 512kbit allot 1500
prio 5 bounded isolated
# tc filter add dev $DEV parent 1: protocol ip prio 16 u32 match ip src
192.168.1.0/24 flowid 1:1

I replaced $DEV with each interface name in succession, as I wasn''t
sure
which to use. Here''s the output of ifconfig from the router:

# ifconfig
br0       Link encap:Ethernet  HWaddr 00:16:01:59:EF:00
          inet addr:192.168.1.1  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:114200 errors:0 dropped:0 overruns:0 frame:0
          TX packets:125307 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:14568079 (13.8 MiB)  TX bytes:71752923 (68.4 MiB)

eth0      Link encap:Ethernet  HWaddr 00:16:01:59:EF:00
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:64266 errors:0 dropped:0 overruns:0 frame:0
          TX packets:54720 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:65677538 (62.6 MiB)  TX bytes:12736990 (12.1 MiB)
          Interrupt:4

eth1      Link encap:Ethernet  HWaddr 00:16:01:59:EF:02
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:117891 errors:0 dropped:0 overruns:0 frame:253671
          TX packets:133961 errors:3 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:16589572 (15.8 MiB)  TX bytes:75539860 (72.0 MiB)
          Interrupt:2 Base address:0x5000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING MULTICAST  MTU:16436  Metric:1
          RX packets:46 errors:0 dropped:0 overruns:0 frame:0
          TX packets:46 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:5328 (5.2 KiB)  TX bytes:5328 (5.2 KiB)

vlan0     Link encap:Ethernet  HWaddr 00:16:01:59:EF:00
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5570 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:1086810 (1.0 MiB)

vlan1     Link encap:Ethernet  HWaddr 00:16:01:59:EF:01
          inet addr:192.168.10.138  Bcast:192.168.10.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:64281 errors:0 dropped:0 overruns:0 frame:0
          TX packets:49178 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:64522436 (61.5 MiB)  TX bytes:11432967 (10.9 MiB)


Can anyone tell me what I''m doing wrong here?

Best,
Ryan


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Ryan O''Toole wrote:
> I''m trying to setup a DD-WRT router (www.dd-wrt.com; embedded
micro-device
> linux for the uninitiated) to rate limit all the traffic it receives from
> its wi-fi interface.
Qdiscs work on traffic leaving the interfaces. If you want to limit 
incoming traffic have a look at the policer example in LARTC, there are 
other ways using ifb/imq, but I don''t know if dd-wrt will have those.

Wireless is a special case - half duplex, so it''s going to be even 
harder to do.

Andy.