Expand all | Collapse all

TCAM usage on EX4600

Jump to Best Answer
  • 1.  TCAM usage on EX4600

    Posted 04-18-2019 09:28

    Can someone explain to me tcam usage on the EX4600 platform?  I understand that the available tcam space is split between egress and ingress and how to calculate how much tcam space a particular filter is using.  What I don't get it why my total available tcam space goes up or down based on how many irb's I have defined.

  • 2.  RE: TCAM usage on EX4600

    Posted 04-20-2019 20:12

  • 3.  RE: TCAM usage on EX4600
    Best Answer

    Posted 04-22-2019 07:53

    Hi lcroce,


    TCAM dynamically allocates the minimum number of memory slices required to store the filters for a particular filter type, as needed. This documentation explains this for VLAN filters: 



    Let me know if that answers your query.  


    Also, some jargon you'll come across while checking filters for TCAM usage:

    • Port-based ACL (PACL): Ingress and egress
    • VLAN-based ACL (VACL): Ingress and egress
    • Router-based ACL (RACL): Ingress and egress
    • ACL entries (ACE)
    • Ingress filter processor (IFP)
    • Egress filter processor (EFP)
    • VLAN filter processor (VFP)


    Hope this helps.




    If this solves your problem, please mark this post as "Accepted Solution."
    Kudos are always appreciated :).

  • 4.  RE: TCAM usage on EX4600

    Posted 04-24-2019 10:27

    Yes, this is what I was looking for.  Thanks.