RE: [LARTC] TC Hashing Filters

["Adam Towarnyckyj" <adamt@commspeed.net>]

zoop@lone.ath.cx wrote:
>>	# Create filter to hash out last octet and link to hash table 2:
>>	tc filter add dev eth1 protocol ip parent 1:1 prio 5 u32 ht
>>800:: match ip src 216.19.49.0/24 hashkey mask 0x000000ff at 12 link
2:
>
>
>I think this needs to be attached to the root.
>parent 1:0

Catalin BOIE (util@deuroconsult.ro) wrote:
>> 	# Create root qdisc
>> 	tc qdisc add dev eth1 root handle 1:0 cbq bandwidth 200Mbit
avpkt 1000
>> 	# Create a "transit class"
>> 	tc class add dev eth1 parent 1:0 classid 1:1 cbq bandwidth
200Mbit 
>> rate 200Mbit allot 1514 weight 2Mbit prio 8 maxburst 10 avpkt 1000
>> 	# Create hash table attached to transit class
>> 	tc filter add dev eth1 parent 1:0 handle 2: protocol ip u32
divisor 256
>> 	# Create filter to hash out last octet and link to hash table 2:
>> 	tc filter add dev eth1 protocol ip parent 1:1 prio 5 u32 ht
>> 800:: match ip src 216.19.49.0/24 hashkey mask 0x000000ff at 12 link
2:
>> 	# Create class for 128Kbit limit
>> 	tc class add dev eth1 parent 1:0 classid 1:2 cbq bandwidth
>
>I think here is parent 1:1, right?
>
>> 200Mbit rate 128kbit allot 1514 prio 5 maxburst 20 avpkt 1000 bounded
>> 	# Create filter for IP I'm limiting
>> 	tc filter add dev eth1 protocol ip parent 1:0 prio 5 u32 ht 2:8c

>> match ip src 216.19.49.140 flowid 1:2


	I have tried both of your suggestions and it is still allowing
all traffic to pass through. Thank you for the help though. Here is what
I have now:

# Create root qdisc
tc qdisc add dev eth1 root handle 1:0 cbq bandwidth 200Mbit avpkt 1000

# Create transit class
tc class add dev eth1 parent 1:0 classid 1:1 cbq bandwidth 200Mbit rate
200Mbit allot 1514 weight 2Mbit prio 8 maxburst 10 avpkt 1000

# Create hash table and attach to transit class
tc filter add dev eth1 parent 1:1 handle 2: protocol ip u32 divisor 256

# Create filter to hash out last octet and link to hash table 2:
tc filter add dev eth1 protocol ip parent 1:0 prio 5 u32 ht 800:: match
ip src 216.19.49.0/24 hashkey mask 0x000000ff at 12 link 2:

# Create class for 128Kbit limit
tc class add dev eth1 parent 1:1 classid 1:2 cbq bandwidth 200Mbit rate
128kbit allot 1514 prio 5 maxburst 20 avpkt 1000 bounded

# Create filter for IP I'm limiting
tc filter add dev eth1 protocol ip parent 1:0 prio 5 u32 ht 2:8c match
ip src 216.19.49.140 flowid 1:2

	If anyone can still see anything I'm doing wrong, I'd appreciate
it if you pointed it out. I've tried many different scenarios with
different parents and they still don't work. And as for the question
earlier about if I was doing this for an ISP, yes I am. If you would
like some help, and if I can get this to work, I plan on writing a How
To and posting it to a website so people can easily set this up
themselves. I find the lack of documentation on the subject quite
frustrating at times. Thanks all for your help.

Adam Towarnyckyj

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