[c-nsp] 3750 High Cpu IP Input

[Brian Turnbow]

how many routed interfaces do you have ( sh ip int brief with ip addresses ) ?
if more than 8 change the sdm template to routing 
 
you can use sh platform ip unicast failed route  to see if routes are failing to be programmed into tcam
 
Brian
 
 
 
 
________________________________

From: Chris Lane [mailto:clane1875 at gmail.com] 
Sent: venerdì 24 aprile 2009 11.17
To: Brian Turnbow
Cc: Peter Rathlev; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] 3750 High Cpu IP Input


sh controllers cpu-interface 
ASIC    Rxbiterr   Rxunder    Fwdctfix   Txbuflos   Rxbufloc   Rxbufdrain
-------------------------------------------------------------------------
ASIC0     0          0          0          0          0          0         
ASIC1     0          0          0          0          0          0         


cpu-queue-frames  retrieved  dropped    invalid    hol-block  stray
----------------- ---------- ---------- ---------- ---------- ----------
rpc               0          0          0          0          0         
stp               1807       0          0          0          0         
ipc               0          0          0          0          0         
routing protocol  1516326    0          0          0          0         
L2 protocol       27         0          0          0          0         
remote console    0          0          0          0          0         
sw forwarding     915        0          0          0          0         
host              2014       0          0          0          0         
broadcast         1766       0          0          0          0         
cbt-to-spt        0          0          0          0          0         
igmp snooping     1518651    0          0          0          0         
icmp              45         0          0          0          0         
logging           0          0          0          0          0         
rpf-fail          0          0          0          0          0         
queue14           0          0          0          0          0         
cpu heartbeat     14116      0          0          0          0         

ODD i have disabled IGMP SNOOPING... 

On Fri, Apr 24, 2009 at 4:19 AM, Brian Turnbow <b.turnbow at twt.it> wrote:


	You can use  show controller cpu  to help see whats going to the cpu
	Make sure you have no ip redirects and no proxy arp on all the interfaces.
	How many routed interfaces do you have ?
	The output below for "max" is for 8 routed interfaces if you have more you should change to the desktop switching template.
	With your roughly your values for indirectly connected routes and 13 ip interfaces on a box I needed to switch the template "sdm prefer routing" requies reload.
	
	Regards
	
	Brian
	




	-----Original Message-----
	From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Chris Lane
	Sent: venerdì 24 aprile 2009 1.09
	To: Peter Rathlev
	Cc: cisco-nsp at puck.nether.net
	Subject: Re: [c-nsp] 3750 High Cpu IP Input
	
	
	sh platform tcam utilization
	
	CAM Utilization for ASIC# 0                      Max            Used
	                                            Masks/Values    Masks/values
	
	 Unicast mac addresses:                        784/6272         37/235
	 IPv4 IGMP groups + multicast routes:          144/1152          6/26
	 IPv4 unicast directly-connected routes:       784/6272         37/235
	 IPv4 unicast indirectly-connected routes:     272/2176         52/326
	 IPv4 policy based routing aces:                 0/0             0/0
	 IPv4 qos aces:                                528/528          18/18
	 IPv4 security aces:                          1024/1024         57/57
	
	Note: Allocation of TCAM entries per feature uses
	a complex algorithm. The above information is meant
	to provide an abstract view of the current TCAM utilization
	
	Hope this helps.
	
	On Thu, Apr 23, 2009 at 4:41 PM, Peter Rathlev <peter at rathlev.dk> wrote:
	
	> On Thu, 2009-04-23 at 16:15 -0400, Chris Lane wrote:
	> >  This box has been in production for over a year and doesn't really do
	> > to much as you can see from my orig thread it moves about 11MB.
	> >
	> > This just started late last night yet we didn't add any new customer
	> > nor did anybody even touch switch as the device is remote.
	> >
	> > I read in an older thread regarding same thing that the person
	> > rebooted and of course it resolved issue. I am planning to do that
	> > Early tomorrow am, but
	> > i really want to know what the heck is causing this.
	> >
	> > Yes CEF is running.
	>
	> What about TCAM utilisation ("show platform tcam utilization")?
	>
	> Regards,
	> Peter
	>
	>
	>
	
	
	--
	//CL
	
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-- 
//CL