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Regarding advancements in lookup algorithms (as AlgoMatch by Arista) and maybe other new technology advancements, Is TCAM a necessary module for networking silicons? Do merchant silicon like Broadcom chipsets have on-chip TCAM? if yes, Isn't it enough so there is no need to place external TCAM?

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Both variants, internal and external TCAM, exist. While internal is the best choice and more common for lowest cost and lowest latency, external TCAM enables a higher scalability for the required tables (routes, ACLs, QoS, etc).

For instance, Broadcom's StrataDNX series supports external memory while the less scalable StrataConnect series doesn't.

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  • So... Anyway, a chipset needs TCAM for networking function, right? – A.A Dec 28 '19 at 10:18
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    @A.A Yes, either on-chip or external. – Zac67 Dec 28 '19 at 11:12

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