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Original question:

TDA4VM: CPSW9 configuration

TDA4VM: CPSW9: ALE Configuration - Table entry for Ethernet type

Nestor Neila
Prodigy 40 points

Part Number: TDA4VM

Hi Team.

if I configure a table entry for ethernet type and then set a policer for this entry, how is the behavior ?

Are all the Ethernet pakets that does not contain this Ethertype dropped ? or is it the opposite and the pakets with that Ethertype are dropped ?

What is configured by default by TI ? are the table entries and policers empty ?

Thanks for your support

  • 0
    TI__Guru* 75710 points

    Hi,

    Nestor Neila said:
    if I configure a table entry for ethernet type and then set a policer for this entry, how is the behavior ?

    Behavior will be dependent on Policer rules, it will be rate liming based on Ether type.

    Nestor Neila said:
    Are all the Ethernet pakets that does not contain this Ethertype dropped ? or is it the opposite and the pakets with that Ethertype are dropped ?

    No, packet filter rules is based on MAC address.
    Here, based on policer rate limiting packet will be dropped and accepted. It means packets will be coming based on Destination MAC address and further Rate liming happens based on Ether type as per policer.
    Any packet will not contain Ether type set for policer will not undergo any rate liming.

    Nestor Neila said:
    What is configured by default by TI ? Are the table entries and policers empty ?

    By default RTOS SDK Ethfw will set few ALE tables and classifier to handle the incoming data.
    Example:

    • Broadcast Destination MAC address forward to all ports.
    • ARP ether type with Broadcast MAC send to Ethfw.
    • If Vlan is enabled few VLAN entries with default VLAN values.
    • If any client core attached to Ethfw then MAC address of Client will register to forward packets dedicated to client will send directly using different UDMA flow.

    Best Regards,
    Sudheer