Questions tagged [asics]

For questions about application-specific integrated circuit (ASIC), where it is an integrated circuit (IC) customized for a particular use, rather than intended for general-purpose use. Only use this tag in relation to on topic network devices.

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Cisco express forwarding

I'm studying CEF and I'm confused with these terms : Route processor, forwarding engine, centralized and distributed forwarding, npu So my questions is is the RP a hardware component or an ios ...
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3answers
2k views

Switching methods (CEF, hardware, software, TCAM table)

Currently studying the switching methods, someone could confirm to me the assumptions as follows ? I also would have some questions. Generally the layer-2 switches have ASIC components with CAM ...
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2answers
1k views

What is the difference between a PHY chip in a switch and a switch controller ASIC in the switch?

I am analyzing the block diagram of a switch and I would like to know more about the difference between PHY chip and ASIC (which I think is also called Switch controller). What is the JOB of each ...
2
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1answer
2k views

What is RTAG7 hash

I am trying to read about RTAG7 hashing in ASICs. I am unable to find good literature on it. Can someone please explain what is the RTAG7 hash?
2
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1answer
3k views

How a packet processor detects if vlan tag is present in Ethernet header or not? [duplicate]

AFAIK 802.1Q tag is optional in the FRame header. So it may or not be present in the header right? SO how does the Packet processing ASIC or processor identifies or parses to interpret the frame ...
10
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2answers
5k views

TCAM relationships in hardware-switching architecture

I am familiar (high level) with how Ternary Content Addressable Memory operates but I remain confused as to how TCAM relates to ASICs and when these components possibly also combine with the CPU for ...