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New Member

CEF on c6500 with MSM

I'm mot sure if CEF is working att all.

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We are running ios Version 12.0(4a)WX5(11) on the MSM.

CEF is enabled:

spt-3-4-ro#sh ip cef summary

IP CEF with switching (Table Version 19976)

628 routes, 0 reresolve, 0 unresolved (0 old, 0 new)

628 leaves, 99 nodes, 177132 bytes, 19981 inserts, 19353 invalidations

0 load sharing elements, 0 bytes, 0 references

2 CEF resets, 0 revisions of existing leaves

refcounts: 26756 leaf, 25600 node

Adjacency Table has 464 adjacencies

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But show interfaces stat does not show anything in the route cache counters, everything is only in the procesor counter. According the documentation for CEF "Execute the show interface stats command and confirm incrementing hits for route cache inbound.

Note: The route cache counter includes both fast-switched and CEF-switched packets."

-------------

spt-3-4-ro#sh interfaces stat

GigabitEthernet0/0/0

Switching path Pkts In Chars In Pkts Out Chars Out

Processor 870007615 62530716 1078052832 4127026129

Route cache 0 0 0 0

Total 870007615 62530716 1078052832 4127026129

GigabitEthernet1/0/0

Switching path Pkts In Chars In Pkts Out Chars Out

Processor 1570042983 915192551 1748381344 767615756

Route cache 0 0 0 0

Total 1570064318 925970840 1748404255 774233914

Controller0

Switching path Pkts In Chars In Pkts Out Chars Out

Processor 3815857776 857507335 1161121678 1409906790

Route cache 0 0 0 0

Total 3815857776 857507335 1161121678 1409906790

GigabitEthernet3/0/0

Switching path Pkts In Chars In Pkts Out Chars Out

Processor 1260446871 986365264 714095684 2168919142

Route cache 0 0 0 0

Total 1260446871 986365264 714095684 2168919142

GigabitEthernet4/0/0

Switching path Pkts In Chars In Pkts Out Chars Out

Processor 2064128163 2377995992 2465348686 1351290150

Route cache 0 0 0 0

Total 2064128163 2377995992 2465348686 1351290150

Port-channel1

Switching path Pkts In Chars In Pkts Out Chars Out

Processor 1469799245 147640677 1711077651 4244227521

Route cache 0 0 0 0

Total 1469799245 147640677 1711077651 4244227521

Loopback0

Switching path Pkts In Chars In Pkts Out Chars Out

Processor 0 0 15 0

Route cache 0 0 0 0

Total 0 0 15 0

spt-3-4-ro#

------------

Are ther some explanations for why the Route cache is 0 for all interfaces?

2 REPLIES
New Member

Re: CEF on c6500 with MSM

Do a check with show ip interface command and see if CEF is disabled. If yes then enable with ip route cache cef command and then do a show interface statistics.

Hope this helps

Regards

Maneesh

New Member

Re: CEF on c6500 with MSM

Hello Maneesh,

The show ip interface for GigabitEthernetX/X/X and Port-channer1 shows:

---------

spt-3-4-ro#sh ip interface

GigabitEthernet0/0/0 is up, line protocol is up

Internet protocol processing disabled

GigabitEthernet1/0/0 is up, line protocol is up

Internet protocol processing disabled

Controller0 is up, line protocol is up

Internet protocol processing disabled

GigabitEthernet3/0/0 is up, line protocol is up

Internet protocol processing disabled

GigabitEthernet4/0/0 is up, line protocol is up

Internet protocol processing disabled

Port-channel1 is up, line protocol is up

Internet protocol processing disabled

-----

But the show ip interface for Port-chanel1.X (the vllans) show

IP fast switching is disabled

IP fast switching on the same interface is disabled

IP CEF switching is enabled

/daniel

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