I have a 6509 switch on my network. I am a bit new to the L3 switching technology. But I was under the impression that MLS(route caching) has been replaced by CEF. I have a sup720 installed. I issued a show ip cef and got to look at the CEF table. But I was also able to look at show mls cef with some entries.
* So is my switch running CEF and MLS(route-cache)?
* why is there a Layer 2 forwarding engine , when we already have a L3 forwarding engine which does the ASIC based manipulation ( the o/p from sh mls stat is pasted below)
show mls statistics
Statistics for Earl in Module 5
L2 Forwarding Engine
Total packets Switched : 443298873549
L3 Forwarding Engine
Total packets L3 Switched : 443005602249 @ 56324 pps
After noticing this output I am inclined to think that the l2 forwarding engine is the dataplane, the L3 forwarding engine is the control plane and the Software L3 engine is the RP(route processor) Am I right?
* Is TCAM used to store the FIB and the ADj Table that CEF uses, so everytime we say a CEF lookup its actually a TCAM lookup ( FIB lookup at the IP-prefix region and then using the next hop IP another TCAM lookup at the adjacency region for the rewrite info)returning the mem pointers to the relevant match?
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
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