Re: wildcard flowid in framework PIB?

Brian:
Please see inline below.
-- Kwok --

At 11:54 AM 11/8/02 +1100, Brian Williams wrote:
>Hi Kwok.
>I still am not clear how you would indicate a value to match all FlowIDs, 
>and hence the FlowId can be ignored. Please see further inline.
>/brian
>
>Kwok Ho Chan wrote:
>
>>Brian, Emmanuel:
>>We do not need wildcard for the frwkIpFilterFlowId attribute in the
>>Framework PIB's frwkIpFilterEntry.
>>
>>The reasoning is as follows:
>
><snip>
>
>>>    If an IPv6 node is not providing flow-specific treatment, it MUST
>>>    ignore the field when receiving or forwarding a packet.
>I assume you are using this as the key point. What I am after is how you 
>tell the node that it is not doing flow-specific treatment, and therefore 
>the field can be ignored. That is, what do you send in the PIB to tell the 
>node that the FlowId is not used? This is not case 1, 2, or 3 below.

The encoding of the frwkIpFilterFlowId attribute can have a length of zero, 
used to
indicate the attribute is not used (please see COPS-PR RFC 3084).  Hence this
is used to indicate this attribute is not used as part of the filter 
definition and will
not contribute to the filtering action, resulting in a "don't care" 
condition for
frwkIpFilterFlowId,  the meaning of a wildcard match for this attribute.


>>the draft-ietf-ipv6-flow-label-03.txt draft indicate that there can be 3 
>>conditions
>>for the Flow Label field of the IPv6 header:
>>1. It contain the value of zero, meaning it is not used.
>>2. It contain some specific value, with no defined syntax and semantics.
>>     Hence each value is unique on its own with no relationship to Flow 
>> Labels
>>     of containing another value.
>>3. It contain some value other than zero.
>>
>>For the first 2 cases indicated above, the filter setup for them is 
>>trivial, just
>>set the frwkIpFilterFlowId to zero or the specific value needed.
>
>This is clear.
>
>>For the 3rd case, the filtering definition should use the 
>>frwkBaseFilterNegation
>>set to true and frwkIpFilterFlowId set to zero.  This will indicate a 
>>filter match
>>for all Flow Label values other than zero.
>
>This is also clear.
>
>>Please let me know if this does not resolve the question you have.
>>Thanks!
>>-- Kwok --
>>
>>
>>At 09:13 AM 11/8/02 +1100, Brian Williams wrote:
>>
>>>Hi Emmanuel.
>>>Please see comments inline.
>>>/brian
>>>
>>>Emmanuel Dumont wrote:
>>>
>>>>Hi Brian,
>>>>
>>>>Do you think a wildcard is needed for the FlowId attribute ?
>>>I consider that a wildcard would be needed for FlowId as much as for the 
>>>other attributes (eg DSCP). I think there would need to be an 
>>>explanation of why one is not provided.
>>>
>>>>Which one could you suggest ?
>>>
>>>I would think a value of -1 (as used for DSCP) would be appropriate.
>>>
>>>>Kwok: is it an omission in the FR-PIB ?
>>>>Maybe an IPv6 expert can help us to solve that question...
>>>>
>>>>Brian : Do you think that others wildcards are missing ?
>>>
>>>This is the only one that I have identified is missing from the filter. 
>>>I have not done a careful check on anything else in the document.
>>>
>>>>Emmanuel Dumont
>>>>----------------------------
>>>>France Telecom OCISI/DIeP (Guyancourt, France)
>>>>Mail: [email protected] / [email protected]
>>>>----------------------------
>>>>
>>>>-----Message d'origine-----
>>>>De : [email protected] [mailto:[email protected]]De la part de
>>>>Brian Williams
>>>>Envoye : mercredi 6 novembre 2002 00:46
>>>>A : [email protected]
>>>>Objet : wildcard flowid in framework PIB?
>>>>
>>>>Hi All.
>>>>I have a question on the framework PIB. When I look at many of the
>>>>filter attributes, there exist values that can be used as wildcards.
>>>>
>>>>The following are a few examples:
>>>>- for source and destination addresses, a prefix length of 0 indicates a
>>>>match of any address
>>>>- for DSCP, a value of -1 will match all DSCP values
>>>>- for port numbers, you can set the min and max to include all values
>>>>- for protocol number, a value of 255 means match all
>>>>
>>>>However, for the FlowId, the range is specified as 0..1048575 which is
>>>>the valid range of the 20 bit label. How is a wildcard FlowId indicated?
>>>>/brian
>>>