Two tables are utilized in switch operations, CAM and TCAM (ternary content-addressable memory). We gone to the CAM table in an prior talk. In this post we briefly conversation around Ternary Substance Addressable Memory, or TCAM. Why is it called Ternary? Since it gives three comes about: 0, 1, and "do not care". The TCAM (ternary content-addressable memory) permits a parcel to be assessed against a whole ACL in a single table lookup. One swoop. This makes lookup ultra-fast. It is worn out equipment.

There are two components of TCAM operation:

- Switch Database Manager (SDM)

- Which configures or tunes TCAM partitions, if needed.

- Feature Manager (FM)

- Which compiles the access control entries into the TCAM table.

Greg Ferro has some good information on TCAM and it's impact with IPv6.
https://mobileinfoworld.com/?p=609