[LARTC] How do you delete a filter?

["Martija, Ricardo V" <rmartija@telcordia.com>]

Hi,

 

I am very new to tc.  I added a filter using the following command:

 

   tc filter add dev eth0 V parent 20:0 protocol ip prio 1 handle ::128 u32 match ip tos 0x44 0xfc flowid 20:1

 

To check if the filter rule was indeed added, I run

 

   tc filter show dev eth0 parent 20:

                                               

This gave me the following output:

 

   filter protocol ip pref 1 u32

   filter protocol ip pref 1 u32 fh 800: ht divisor 1

   filter protocol ip pref 1 u32 fh 800::128 order 296 key ht 800 bkt 0 flowid 20:1

     match 00440000/00fc0000 at 0

 

I tried deleting the filter rule that I added using:

 

   tc filter del dev eth0 pref 1 protocol ip handle 800::160

 

This gave me the following message:

 

   Must specify filter type when using "handle"

 

I modified the delete command, as follows:

 

   tc filter del dev eth0 pref 1 protocol ip handle 800::160 u32

 

This gave the following error message:

 

   RTNETLINK answers: Invalid argument

 

I am pretty much stumped. Can anyone tell me how I can delete a filter?

 

Thanks,

 

Rick

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