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How many times are Layer3 lookups preformed on packet transiting a CRS or ASR9K router??

TaeMyoungJung
Level 1
Level 1

‎07-02-2018 11:45 PM - last edited on ‎03-25-2019 04:48 PM by Community Manager

I think that Three times in the ingress linecard, the fabric, and the egress linecard

 

how do you think?? what is the correct??

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Jon Marshall
Hall of Fame
Hall of Fame

‎07-03-2018 05:46 AM

 

For the ASR9K as far as I can tell from a quick read of the architecture document there are two lookups done, one on ingress and one on egress. 

 

There is no lookup done by the fabric itself. 

 

Jon

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