1. PSAMP MIB Status Managed Objects for Packet Sampling A Status Report Thomas Dietz dietz@netlab.nec.dedietz@netlab.nec.de Benoit Claise bclaise@cisco.combclaise@cisco.com

2. Changes from Previous Version Changed serveral sampling method parameters to improve the alignment with the sample tech draft Improved several sampling/filtering methods (some of them are still placeholders) Created new table to link instance with sampling/filtering methods Restricted MIB names to 32 characters

3. MIB Structure Currently there are 4 groups of objects The sampling methods group Defines all sampling methods and their parameters The filtering methods group Defines all filtering methods and their parameters The reporting group Defines the collectors the device reports the packets to The instance group Links sampling/filtering methods, their parameters and the collectors together

4. The sampling/filtering group Each sampling/filtering method is represented by its capabilities and a parameter table Currently there are 7 sampling methods and 3 filtering methods defined The parameter table contains all parameter sets currenly used on the device The MIB tree for a method must only be implemented if the method is supported by the device

5. The Reporting Group Contains the addresses of the collectors the device reports to in the collector table Groups collectors together in the collector group table The device can report the same sampled packets to multiple collectors Must be present in every device

6. The Instance Group Contains the 2 tables that are vital for the MIB The instance table contains the basic information for all the sampling processes applied to the device The method chain table links the instance to the sampling/filtering methods and their parameter sets These 2 tables must be present on any device

7. Table Summary Group# of Tables Sampling Methods7 (none mandatory) Filtering Methods3 (none mandatory) Reporting2 (all mandatory) Instance2 (all mandatory)

8. psampMethodChainEntry.2.5.1 = 1 (second index) psampMethodChainEntry.2.5.2 = 2 (second index) psampMethodChainEntry.3.5.1 = 1.3.6.1.2.1.XXX.1.1.2.3.1.10 psampMethodChainEntry.3.5.2 = 1.3.6.1.2.1.XXX.1.1.1.3.1.4 Linking Everything Together psampSampTimeBasedParamSetTableEntry.10 psampSampCountBasedParamSetTableEntry.4 psampInstanceEntry.1.5 = 1 (index) psampInstanceEntry.x.5... psampInstanceEntry.6.5 = 7 (index of collector group) psampCollectorGroupEntry.1.7.5 = 7 (index) Order in which the methods are applied

9. Open Issues Some parameters for sampling/filtering methods still need to be defined Template table must be completed and linked to instances and collectors Observation point must be modeled Row status objects in writable tables

10. The End Thank you for your attention