Wants to understand traffic flow of Catalyst layer3 Switch 3850 . what are sequence this switch will check to delivery packet to destination

Question

i wants to know clear understanding about how Cisco layer3 switch checks in sequence order when traffic arrive to its L3 Interface . i want to know traffic flow in Cisco layer 3 switch ,because switch has ARP -table ,routing table access-list . which one it will check in order to delivery packet to destination . please help..

Ron Trunk · Answer

The order of operations can vary depending on the specific IOS version and the configuration, but here's a general idea from the Cisco website.
Note that most L3 switches can't do NAT or IPSec.

If IPSec then check input access list
decryption - for CET (Cisco Encryption Technology) or IPSec
check input access list
check input rate limits
input accounting
redirect to web cache
policy routing
routing
NAT inside to outside (local to global translation)
crypto (check map and mark for encryption)
check output access list
inspect (Context-based Access Control (CBAC))
TCP intercept
encryption
Queueing

Wants to understand traffic flow of Catalyst layer3 Switch 3850 . what are sequence this switch will check to delivery packet to destination

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