Acl Tcam

[object Object],[object Object],[object Object],A. Sivaramakrishnan April 2005

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],Page

Ternary CAM – an Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page

Mask Value Arrangement ,[object Object],[object Object],Page Mask 1 Mask 2 Mask 2 Mask 3 Mask 4 Mask 5 Mask6 Value 2 Value 3 Value 4 Value 7 Value 6 Value 1 Value 1 Value 2 Value 3 Value 4 Value 5 Value 6 Value 7 Value 8 Value 1 Value 2 Value 3 Value 4 Value 5 Value 6 Value 7 Value 8 Mask 1

Programming Values & Masks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page ,[object Object],[object Object],[object Object],[object Object],Entries pertaining to a particular mask should be grouped as much as possible, in case of one-many mask-entry arrangement mechanism

Where we are? ,[object Object],[object Object],[object Object],[object Object],[object Object],Page

Flow Key ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page

Flow Key Fields ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page

Where we are ? ,[object Object],[object Object],[object Object],[object Object],[object Object],Page

TCAM Resource Management Framework Page Resource Management Algorithm Driver TCAM Hardware

Where we are? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page

When program the ACL TCAM? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page ,[object Object],[object Object]

TCAM Resource Management Algorithm - Sequence of Events ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page

TCAM Resource Managing Algorithm - Design Focus ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page

Reducing Number of TCAM Entries ,[object Object],[object Object],[object Object],Page

Logical operations for TCP/UDP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page

Optimizing Logical operations for TCP/UDP Page ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Refer Port Registers Reg 0 Reg 1 Reg 2 Reg 3 Reg 4 Reg 5 Reg 6 Reg 7 Reg 8 Reg 9 Reg 10 Reg 11 Reg 12 Reg 13 Reg 14 Reg 15 Greater than 34 Range 60000 64000

Merging ACLs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page

Mask Space freeing ,[object Object],[object Object],Page Mask 1 E1, E2, E3, E4 E5, E6, E7, E8 Mask 2 E9, E10, E11 Mask 1 E20, E21 Mask 1 E1, E2, E3, E4 E5, E20, E21, E8 Mask 2 E9, E10, E11 Delete Entry E6 & E7

Error Recovery ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page

Hardware programming - Optimization techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page

Data Path Operation Page B Use reg info to form the flowkey get the interface info Get the rest of info from the packet A B C form a flow key lookup reg for layer4 info lookup TCAM Use result Use default result start identify the packet get packet header parse the fields A C Get layer 4 info start

Recap ,[object Object],[object Object],[object Object],[object Object],[object Object],Page

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