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Cisco Bug: CSCsy79299 - Add a knob to switch off MFI Stat collection

Last Modified

Aug 18, 2015

Products (1)

  • Cisco IOS

Known Affected Releases

12.2(33)SRC

Description (partial)

Symptom:

On a 7600/Cat6k with SUP720 running 12.2(33)SRC3 we might see :

%EOBC-3-NOEOBCBUF: No EOBC buffer available.  Dropping the packet.

This is a side effect of the new MFI Stat collection feature:

CPU utilization for five seconds: 98%/3%; one minute: 62%; five minutes: 60%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
246     2010488      8622     233181 75.27% 43.00% 40.58%   0 MFI LFD Stats
Pr
134      460428      2742     167916 14.23%  9.39%  9.24%   0 CFIB LC STATS Ta

The EOBC tx rate is really high (almost 5 Mbps)

c7600-2-dfc3#show eobc | i rate
     rx rate (bits/sec) = 56000      rx rate (packets/sec)  = 88
     tx rate (bits/sec) = 4470000    tx rate (packets/sec)  = 398

Conditions: 

Hardware/SW is 12.2(33)SRC3 and PFC3BXL

Customer is running a simulated internet routing table in a VRF (e.g. 270K 
routes and allocate 270K local labels).

When doing this AND sending lots of traffic through a TenGigabitEthernet DFC linecard, we get the following EOBC messages printed all the time.
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