[nsp] 7206vxr pps & mbit/s limits

jlewis at lewis.org jlewis at lewis.org
Wed Oct 29 00:36:32 EST 2003

On Wed, 29 Oct 2003, Rafi Sadowsky wrote:

>  Check out bug CSCdw50638 
> ==
> If you notice that a Fast Ethernet on a 7200 is experiencing
> incrementing overruns and output errors. You should check
> to see if a "debug ethernet" is generating %DEC21140-3-UNDERFLO
> (see below), you may have this bug.

Problem sounds similar, but the hardware is different.  This card is AMD 
Am79c971, and the errors are:

Oct 28 22:18:08: %AMDP2_FE-3-UNDERFLO: FastEthernet4/1 transmit error
Oct 28 22:19:01: %AMDP2_FE-3-UNDERFLO: FastEthernet4/1 transmit error
Oct 28 22:19:50: %AMDP2_FE-3-UNDERFLO: FastEthernet4/1 transmit error
Oct 28 22:20:47: %AMDP2_FE-3-UNDERFLO: FastEthernet4/1 transmit error
Oct 28 22:20:47: %AMDP2_FE-3-UNDERFLO: FastEthernet4/1 transmit error

If I debug ethernet-interface, I get flooded (many per second) with 
%AMDP2_FE-4-BABBLE: FastEthernet4/0 transmit problem, CSR0=0xC200
which is odd, since most of the underruns and drops are on f4/1.

>  To avoid high number of underruns on dec21140 type of FastEthernet
> controllers, we can enable store and forward on the transmit side. The
> command syntax (can be executed at config level) is "fastether transmit
> store_and_forward enable" You will need to clear the fast ethernet

Is that a valid command?  Even on DEC based interfaces, fastether doesn't 
appear to be a valid config command.

 Jon Lewis *jlewis at lewis.org*|  I route
 Senior Network Engineer     |  therefore you are
 Atlantic Net                |  
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