[rbak-nsp] hello I am newbe in se100

[Blake Willis]

Добрый вечер Роман,

	We had the same error message, at the rate of several per minute,  
last year from April until November.  It was bad enough that we wrote  
a specific regex into our syslog server to filter it.  Ericsson was  
never able to give us a straight answer as to which circuit it was  
really on (255/1 doesn't even show up in any of the "hidden" show  
card 2 commands) nor what kind of packets were causing the message  
(i.e. what that "protocol" number really means), and eventually  
closed our case as we're running 6.1.3.9 on the box in question,  
which seems to be unsupported now.

	One day in Novemember, the packets just stopped.

	The good news is that the messages appear to be purely cosmetic.   
Given that the message is "Cannot read hdr of pak", my best guess was  
that they were IPSec AH packets that the PPA didn't know what to do  
with (I've seen Cisco Cat6500s in the past with the PFC3BXL ASIC  
being unable to forward IPSec AH flows and just punting to the  
supervisor processor as a result; as the control-plane CPU on those  
supervisors is about as powerful as a smartphone & the scheduler  
stinks it doesn't take much traffic to make its life very  
unpleasant).  They could also have been UDP tiny frags or other  
similar trash traffic that packet forwarding ASICs traditionally have  
trouble with.

	Do let us know if you open a case & Ericsson comes back with useful  
information.  Best of luck.

  -Blake

---
  Blake Willis
  Network Architect
  iBrowse