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TCAM usage on EX4600

[ Edited ]
‎04-18-2019 09:27 AM

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.

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Re: TCAM usage on EX4600

‎04-20-2019 08:11 PM
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Accepted by topic author lcroce
‎04-24-2019 10:27 AM

Re: TCAM usage on EX4600

‎04-22-2019 07:52 AM

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 Smiley Happy.

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Re: TCAM usage on EX4600

‎04-24-2019 10:26 AM

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