Dragon0x40
asked on
Should CEF be enabled?
It seems that my switch is process switching all packets.
Is that a bad thing?
sh cef state
CEF Status:
RP instance
common CEF disabled
IPv4 CEF Status:
CEF disabled/not running
dCEF disabled/not running
CEF switching disabled/not running
universal per-destination load sharing algorithm, id 83852352
IPv6 CEF Status:
CEF disabled/not running
dCEF disabled/not running
universal per-destination load sharing algorithm, id 83852352
sh int fa1/0/1 stats
FastEthernet1/0/1
Switching path Pkts In Chars In Pkts Out Chars Out
Processor 0 0 11260657 720682048
Route cache 0 0 0 0
Total 0 0 11260657 720682048
sh int gi1/0/1 stats
GigabitEthernet1/0/1
Switching path Pkts In Chars In Pkts Out Chars Out
Processor 0 0 294692675 18865399070
Route cache 0 0 0 0
Total 0 0 294692675 18865399070
sh proc cpu history
99395744471468293722483529
92094981769421968853337621
100 * * * * * * * *
90 ** * * * * * * * *
80 ** * * * * * * * * * * * * * * * * * * *
70 ** * * * * * * * * * * ** * * * * * * * * * *
60 ** * * * ** * * * * * * * * ** * * * * * * * * * *
50 ** **** ** ** * * * * * * * * ** * ** * *** * ** * * * *
40 ** ******* *** *** **** * * ** * ** * *** * *** * **** * * **
30 ********** ******** **** * ******* ****************** * ******* *** **
20 **************************
10 ##########################
0....5....1....1....2....2
0 5 0 5 0 5 0 5 0 5 0 5 0
CPU% per hour (last 72 hours)
* = maximum CPU% # = average CPU%
Is that a bad thing?
sh cef state
CEF Status:
RP instance
common CEF disabled
IPv4 CEF Status:
CEF disabled/not running
dCEF disabled/not running
CEF switching disabled/not running
universal per-destination load sharing algorithm, id 83852352
IPv6 CEF Status:
CEF disabled/not running
dCEF disabled/not running
universal per-destination load sharing algorithm, id 83852352
sh int fa1/0/1 stats
FastEthernet1/0/1
Switching path Pkts In Chars In Pkts Out Chars Out
Processor 0 0 11260657 720682048
Route cache 0 0 0 0
Total 0 0 11260657 720682048
sh int gi1/0/1 stats
GigabitEthernet1/0/1
Switching path Pkts In Chars In Pkts Out Chars Out
Processor 0 0 294692675 18865399070
Route cache 0 0 0 0
Total 0 0 294692675 18865399070
sh proc cpu history
99395744471468293722483529
92094981769421968853337621
100 * * * * * * * *
90 ** * * * * * * * *
80 ** * * * * * * * * * * * * * * * * * * *
70 ** * * * * * * * * * * ** * * * * * * * * * *
60 ** * * * ** * * * * * * * * ** * * * * * * * * * *
50 ** **** ** ** * * * * * * * * ** * ** * *** * ** * * * *
40 ** ******* *** *** **** * * ** * ** * *** * *** * **** * * **
30 ********** ******** **** * ******* ****************** * ******* *** **
20 **************************
10 ##########################
0....5....1....1....2....2
0 5 0 5 0 5 0 5 0 5 0 5 0
CPU% per hour (last 72 hours)
* = maximum CPU% # = average CPU%
ASKER CERTIFIED SOLUTION
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What kind of switch is this and what network devices do it connect to?
SOLUTION
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ASKER
On a 3750 should I run "ip cef distributed" as I don't see a <cr> after "ip cef ?"
right now my processes show
sh proc cpu
CPU utilization for five seconds: 9%/2%; one minute: 7%; five minutes: 7%
Does this mean that 2% of my cpu is being used for process switching?
right now my processes show
sh proc cpu
CPU utilization for five seconds: 9%/2%; one minute: 7%; five minutes: 7%
Does this mean that 2% of my cpu is being used for process switching?
IP Cef should be it.
ASKER
WS-C3750-48TS-S
#ip cef ?
distributed Distributed Cisco Express Forwarding
linecard CEF linecard commands
load-sharing Load sharing
optimize Optimizations
traffic-statistics Enable collection of traffic statistics
#ip cef ?
distributed Distributed Cisco Express Forwarding
linecard CEF linecard commands
load-sharing Load sharing
optimize Optimizations
traffic-statistics Enable collection of traffic statistics
Are you saying that is it not excepting just "IP CEF"? Have you tried just entering it. Just because <cr> is not listed doesn't mean it is not an option.
ip cef distributed
is what you want
is what you want
@ddiazp
Can you explain why?
Can you explain why?
SOLUTION
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Also, in addition, to perform any further CEF/dCEF functions, you need to have CEF/dCEF running at least:
•Enabling CEF or dCEF (Required)
•Configuring Load Balancing for CEF (Optional)
•Configuring Network Accounting for CEF (Optional)
•Configuring Distributed Tunnel Switching for CEF (Optional)
more info: http://www.cisco.com/en/US/docs/ios/12_1/switch/configuration/guide/xcdcefc.html
•Enabling CEF or dCEF (Required)
•Configuring Load Balancing for CEF (Optional)
•Configuring Network Accounting for CEF (Optional)
•Configuring Distributed Tunnel Switching for CEF (Optional)
more info: http://www.cisco.com/en/US/docs/ios/12_1/switch/configuration/guide/xcdcefc.html
@ddiazp
Thanks
Thanks
My only question is stated above. Have the author tried entering ip cef? I still don't see that not being an available command.
ASKER
I can't enter "ip cef" unless I get authorization.
I thought it would be easy just enter "ip cef distributed" and be done.
Wouldn't just that command help with not punting all packets to the CPU?
I thought it would be easy just enter "ip cef distributed" and be done.
Wouldn't just that command help with not punting all packets to the CPU?
SOLUTION
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can you paste the top 10 from this
show processes cpu sorted 5min
Greg
show processes cpu sorted 5min
Greg
ASKER
I will post sh processes tomorrow.
If we really should have cef on all our access layer switches how do I convince the people I work with?
If we really should have cef on all our access layer switches how do I convince the people I work with?
ASKER
show processes cpu sorted 5min
CPU utilization for five seconds: 5%/0%; one minute: 6%; five minutes: 6%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
212 66656092 277670662 240 0.15% 0.33% 0.34% 0 Spanning Tree
150 61978233 30163250 2054 0.15% 0.18% 0.20% 0 HRPC qos request
141 78542874 598514645 131 0.15% 0.18% 0.16% 0 Hulc LED Process
4 30834452 3033192 10165 0.00% 0.15% 0.12% 0 Check heaps
221 443 173 2560 0.00% 0.26% 0.10% 1 SSH Process
104 38443784 52361199 734 0.00% 0.11% 0.09% 0 hpm counter proc
105 24869316 108972972 228 0.15% 0.09% 0.09% 0 HRPC pm-counters
69 14395718 70120457 205 0.00% 0.02% 0.04% 0 hrpc <- response
306 1340675 716662 1870 0.00% 0.01% 0.02% 0 SNMP ENGINE
65 62802391344647164 4 0.00% 0.04% 0.01% 0 Fifo Error Detec
CPU utilization for five seconds: 5%/0%; one minute: 6%; five minutes: 6%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
212 66656092 277670662 240 0.15% 0.33% 0.34% 0 Spanning Tree
150 61978233 30163250 2054 0.15% 0.18% 0.20% 0 HRPC qos request
141 78542874 598514645 131 0.15% 0.18% 0.16% 0 Hulc LED Process
4 30834452 3033192 10165 0.00% 0.15% 0.12% 0 Check heaps
221 443 173 2560 0.00% 0.26% 0.10% 1 SSH Process
104 38443784 52361199 734 0.00% 0.11% 0.09% 0 hpm counter proc
105 24869316 108972972 228 0.15% 0.09% 0.09% 0 HRPC pm-counters
69 14395718 70120457 205 0.00% 0.02% 0.04% 0 hrpc <- response
306 1340675 716662 1870 0.00% 0.01% 0.02% 0 SNMP ENGINE
65 62802391344647164 4 0.00% 0.04% 0.01% 0 Fifo Error Detec