[nsp] cef process-switching (was: ip verify unicast not logging in ACL)

Tomas Daniska tomas at tronet.com
Wed Nov 12 10:09:50 EST 2003


> CEF switching can occur in both the interrupt as well as the process
> path (at least in recent IOS releases like 12.0S/12.2/12.3/etc.), the
> latter is called "CEF process path". This was mainly added to enable
> tag/mpls primitives (push/pop/swap) also in the process path 
> (ex: "debug
> mpls packet" causes the mpls pkts to be "process-cef-switched", "debug
> ip packet" also prints a "cef process switched" or similar in the
> debug).

awww, i've been wondering once why tagsw/mpls/vrf still works even if
the interfaces have 'no ip route-cache cef'...
> So in summary: A CEF-switched pkt is not necessarily nterrupt 
> switched..
now speaking of cef-process - does all of this apply to nbar and other
features, too?



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