Dear All,
We are having high CPU on one of our Core Switch (C4500X-16). I am attaching the show process cpu output below.
I uploaded the show run on Cisco Output interpreter and got the suggestion to enable "ip cef" and "mls ip multicast non-rpf cef" but here my switch os 4500X so is this recommendation applicable.
I am having a GRE tunnel running in the Switch also multi-casting is enabled. Is root cause of high CPU is multicasting and GRE if yes how can I verify this via log.
"WARNING: The CEF non-RPF rate limiting has been disabled on the device.
CEF based non-RPF rate limiting should always be enabled on Catalyst 6000/6500 switches
with Supervisor 2 or Supervisor 720. If non-RPF traffic were allowed to be sent
to the MSFC it would significantly impact the CPU. The only time this command should
be used is for troubleshooting or as a workaround for a software defect and under
the direction of the Cisco TAC.
RECOMMENDED ACTION: Enter the global command, 'mls ip multicast non-rpf cef' to
reduce the CPU impact of non-rpf traffic to the MSFC."
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CORE-2-FL04-DT#sh ip pim interface count
For switching state use "show ip mfib interface"
Address Interface Mpackets In/Out
172.19.20.13 Tunnel1 105722437765/0
172.19.20.13 Vlan9 0/466673
0.0.0.0 Vlan20 0/0
172.19.160.3 Vlan160 1507475/466673
172.19.162.3 Vlan162 251980/26364779238
172.19.164.3 Vlan164 8940053/466673
172.19.166.3 Vlan166 1778329/36397019052
172.19.168.3 Vlan168 3941068/466673
172.19.170.3 Vlan170 2286694/39584710961
172.19.172.3 Vlan172 8918385/466673
172.19.174.3 Vlan174 1787593/37942544424
172.19.176.3 Vlan176 11404030/466673
172.19.178.3 Vlan178 2808165/51469424652
172.19.180.3 Vlan180 11847745/466673
172.19.182.3 Vlan182 2297822/28919886063
172.19.184.3 Vlan184 64646/466673
CORE-2-FL04-DT#sh ver
Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.06.00.E RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Thu 26-Jun-14 12:52 by prod_rel_team
Cisco IOS-XE software, Copyright (c) 2005-2014 by cisco Systems, Inc.
All rights reserved. Certain components of Cisco IOS-XE software are
licensed under the GNU General Public License ("GPL") Version 2.0. The
software code licensed under GPL Version 2.0 is free software that comes
with ABSOLUTELY NO WARRANTY. You can redistribute and/or modify such
GPL code under the terms of GPL Version 2.0.
(http://www.gnu.org/licenses/gpl-2.0.html) For more details, see the
documentation or "License Notice" file accompanying the IOS-XE software,
or the applicable URL provided on the flyer accompanying the IOS-XE
software.
ROM: 15.0(1r)SG11
CORE-2-FL04-DT uptime is 11 weeks, 4 days, 6 hours, 35 minutes
System returned to ROM by power-on
System restarted at 06:14:42 Qatar Sun Oct 18 2015
Running default software
Jawa Revision 2, Winter Revision 0x0.0x41
Last reload reason: power-on
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License Information for 'WS-C4500X-16'
License Level: entservices Type: Permanent
Next reboot license Level: entservices
cisco WS-C4500X-16 (MPC8572) processor (revision 9) with 4194304K bytes of physical memory.
Processor board ID JAE1851010R
MPC8572 CPU at 1.5GHz, Cisco Catalyst 4500X
Last reset from PowerUp
33 Virtual Ethernet interfaces
24 Ten Gigabit Ethernet interfaces
511K bytes of non-volatile configuration memory.
Configuration register is 0x2101
CORE-2-FL04-DT#sh modu
CORE-2-FL04-DT#sh module
Chassis Type : WS-C4500X-16
Power consumed by backplane : 0 Watts
Mod Ports Card Type Model Serial No.
---+-----+--------------------------------------+------------
1 16 4500X-16 10GE (SFP+) WS-C4500X-16 J
2 8 10GE SFP+ C4KX-NM-8
Thanks
Nibin
