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C4507 VSS High CPU utilization

Ha Dao
Level 1
Level 1

Hi guys

I have a couple of C4507 running in VSS cluster.

OS: cat4500e-universalk9.SPA.03.06.06.E.152-2.E6.bin

 

Recently I see that its performance is not good. I check with Cisco TAG and here is some information:

 

show processes cpu sorted | ex 0.00
Core 0: CPU utilization for five seconds: 17%; one minute: 23%; five minutes: 24%
Core 1: CPU utilization for five seconds: 94%; one minute: 82%; five minutes: 79%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
4498 2789667 41770902 617 52.79 51.93 51.44 0 iosd
4453 2669467 19024340 217 0.52 0.46 0.45 0 ffm
4449 2516705 13582914 185 0.08 0.01 0.01 0 mem_mgmt
4433 4052431 64242878 63 0.04 0.04 0.04 0 pdsvslifshim
4443 2025076 42895077 47 0.04 0.03 0.04 0 plogd
4456 237681 14265450 317 0.04 0.03 0.03 0 cpumemd

 

show processes cpu detailed process iosd sorted | exclude 0.00
Core 0: CPU utilization for five seconds: 18%; one minute: 27%; five minutes: 25%
Core 1: CPU utilization for five seconds: 78%; one minute: 82%; five minutes: 80%
PID T C TID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
(%) (%) (%)
4498 L 2886437 4177211 617 48.44 50.85 51.30 34816 iosd
4498 L 1 4498 1331671 3286342 0 42.13 45.76 46.34 34816 iosd
4498 L 0 6739 275606 8760879 0 6.31 5.09 4.96 34816 iosd.fastpath
92 I 651530 1500734 0 24.00 23.33 23.55 0 Cat4k Mgmt LoPri
29 I 1949884 1728346 0 22.44 33.99 35.55 0 ARP Input
91 I 2406279 2324847 0 13.77 13.44 13.55 0 Cat4k Mgmt HiPri
207 I 3082528 1959890 0 4.55 3.77 3.77 0 Spanning Tree
220 I 1856614 5550886 0 3.00 2.88 2.77 0 ADJ background
198 I 3966843 2386148 0 1.22 1.77 1.77 0 IP Input
411 I 620011 1180168 0 0.77 0.77 0.66 0 IP SLAs XOS Event P
161 I 2581342 6793651 0 0.44 0.33 0.33 0 UDLD
189 I 2436668 3308398 0 0.33 0.55 0.55 0 CDP Protocol
68 I 3476839 6795502 0 0.33 0.33 0.33 0 IDB Work
399 I 1234837 2713729 0 0.33 0.11 0.11 0 LLDP Protocol
376 I 41110 1090462 0 0.22 0.11 0.11 0 LACP Protocol
147 I 3873958 1006431 0 0.22 0.22 0.22 0 Ethernet Msec Timer

 

He told me ARP Input is a little-bit high.

 

Continue debugging:

 

debug platform packet all receive buffer   —-- wait in 1 miunte

un all

show platform cpu packet buffered

 

Then we this message so many times (about 50% in total 1024 packet buffered)

 

Index 1009:
Dec 10 14:41:17.988 HaNoi - RxVlan: unknown, RxPort: unknown
Priority: Unknown, Tag: Unknown Tag, Event: Vs Tunnel Control, Flags: 0x40, Size: 78
Eth: Src F2:00:00:10:80:35 Dst 02:00:00:5E:00:01 Type/Len 0x9200
Remaining data:
0: 0x0 0x8 0xE3 0xFF 0xFD 0x90 0x2 0x53 0xC 0x49
10: 0x62 0x6 0x81 0x0 0x0 0xAC 0x8 0x6 0x0 0x1
20: 0x8 0x0 0x6 0x4 0x0 0x1 0x2 0x53 0xC 0x49
30: 0x62 0x6 0xAC 0x10 0x8 0xBD 0x0 0x0 0x0 0x0
40: 0x0 0x0 0xAC 0x10 0x0 0x1 0x0 0x0 0x0 0x0

 

The Src mac-address doesn't show in Mac-address table, then we don't know where is it from

sh mac add address F2:00:00:10:80:35
No entries present.

 

Do you have any idea for me now ? Thanks

 

1 Reply 1

Ha Dao
Level 1
Level 1

Hi guys

Have any idea for me now ?

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