[c-nsp] CEF not working on policy-routed interfaces?

[Bruce Pinsky]

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joshua sahala wrote:
| On (01/06/05 20:14), Ed Ravin wrote:
|
|>When I look at the CEF status of the interface, though, it says CEF is off
|>(see the line marked with *******):
|>
|
|
| Ed,
|
| Is CEF enabled globally on the router?  According to this:
| http://tinyurl.com/9y6og
|
|   Beginning in Cisco IOS Release 12.0, PBR is supported in the Cisco
|   Express Forwarding (CEF) switching path. CEF-switched PBR has better
|   performance than fast-switched PBR and, therefore, is the optimal
|   way to perform PBR on a router.
|
|   No special configuration is required to enable CEF-switched PBR. It
|   is on by default as soon as you enable CEF and PBR on the router.
|
| So CEF should be working...
|


I know on the 6500 that adding an access list to the uRPF function drops it
out of hardware switching and into the software path.  I'd have to check to
see if adding it on a 7200 could drop you into a different switching path.
~ You could (for grins) try removing the access list from uRPF to see if the
issue is corrected.

In any case, you should take a look to see why the CPU is high (i.e.
process vs interrupt context) before jumping to any conclusions.

- --
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bep

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