RE: [LARTC] TC Hashing Filters

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

Dear list,
	After much code crunching and beating my head against the wall
(literally), I discovered the faulty code. Thanks mostly to gypsy who
played a huge role in helping me discover the problem. My tc filter line
had an error in it which completely baffles me because it worked up
until 2045 lines were entered.

Old command:
tc filter add dev $dev protocol ip parent 12: u32 ht 2:$table1: ht
3:$table2: match ip dst $ip/32 flowid 12:$classid

New command:
tc filter add dev $dev protocol ip parent 12: prio 5 u32 ht 2:$table1:
ht 3:$table2: match ip dst $ip/32 flowid 12:$classid

Who would have thought that a prio would cause that much trouble? I
mean, I know in the documentation it says that it is required for CLASS
commands, but since there's nothing on filters, I had no clue. And
usually if a command requires a parameter, it will error immediately and
not wait for 2045 entries. Also, why the hell would the priority cause a
problem like that to begin with?!

Weird. Anyways, THANKS EVERYONE! (gypsy, Catalin, and Ed especially) It
all works, it's very resource friendly, and all is good again (and I get
to keep my job)! The processor is only about 20% in use now. I'm very
grateful for the hashing filter suggestion from Ed. Thanks a ton. I will
be posting a How To shortly so others can do the same if they ever need
to. Thanks again!

Adam Towarnyckyj

-----Original Message-----
From: lartc-admin@mailman.ds9a.nl [mailto:lartc-admin@mailman.ds9a.nl]
On Behalf Of gypsy
Sent: Thursday, July 15, 2004 8:37 PM
To: adamt@commspeed.net; LARTC
Subject: Re: [LARTC] TC Hashing Filters

Adam Towarnyckyj wrote:
> Any tc filter command I try to
> add from here on out gives me the same error even if I try it manually
> instead of using the script.

Adam,

That is a killer.

Please read the following and then, when we both have the same
information, I'm going to try again to assist you.  

HINT TO READERS:  I hope someone else will help us both because I have
obligations that I'm stealing time from that I can ill afford.

There is a LARTC mailing list thread dated (about) 24 thru 26 June 2003
between Trevor Warren and Michael Ulitskiy whose Subject is "u32
clarification...limits on 2000>???"

Please use your favorite method to find it.  Note that there may be
kernel issues not mentioned by them; kernels change.

I'd like to suggest that you see if anyone involved in that thread will
send you a testing script; perhaps you could find a way to start with a
working setup and then apply minor changes until either it breaks or it
suits you.
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