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Conference azur::mcc

Title:DECmcc user notes file. Does not replace IPMT.
Notice:Use IPMT for problems. Newsletter location in note 6187
Moderator:TAEC::BEROUD
Created:Mon Aug 21 1989
Last Modified:Wed Jun 04 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:6497
Total number of notes:27359

4356.0. "ODS Bridge reject some ICMP frames" by ZUR01::FRICKER () Fri Jan 08 1993 05:13

Env.: DS5000-200
      Ultrix 4.3
      DECMCC 1.2.3



Our Customer has some ODS-Bridges. He can't register this Bridges without 
community password.

If he does a "# ping ods-bridge" the bridge is alive.
If he does a "MCC> test snmp ods-bridge" the test failed.


Problem:
	- "MCC> test" sends a ICMP datagram with a "empty" datafield.
	  The ods-bridge reject this datagram and doesn't send
	  a "ECHO REPLY" back to DECMCC. 

	- Ping sends a ICMP datagram with a "datafield" length between 
          10 und appr. 80 Bytes of data.

Question:
	- is somewhere a workaround available for "putting" some data via
    	  DECMCC into this "empty" datafield or what can I do solve 
    	  this problem ??


          
Kurt
T.RTitleUserPersonal
Name		DateLines
4356.1MOLAR::YAHEY::BOSEFri Jan 08 1993 15:2112
>>	- is somewhere a workaround available for "putting" some data via
>>    	  DECMCC into this "empty" datafield or what can I do solve 
>>    	  this problem ??


	Unfortunately, this is not possible. However, this has been fixed
	in T1.3.0 and the data field length is now 64 bytes in the
	ICMP echo request packet. I guess all you can do for now is wait
	for V1.3.

	Rahul.
4356.2"empty" datafield in T1.3 !ZUR01::FRICKERMon Jan 11 1993 04:0914
    
    >>  Unfortunately, this is not possible. However, this has been fixed
    >>  in T1.3.0 and the data field length is now 64 bytes ....
    
    testsystem ( Ultrix 4.2A, MCCBMS T1.3):
    
    if I do a "test snmp-node" via iconic map, I still see (HP
    analyzer) a ICMP datagram with a "empty" datafield. So I don't see any 
    differences between MCCBMS 1.2 and MCCBMS 1.3
    
    
    Kurt
4356.3MOLAR::YAHEY::BOSEMon Jan 11 1993 15:0714
	I guess there's some confusion about what we mean by an empty 
	data field. In V1.2 the SNMP AM sent out an ICMP echo message
	with just the ICMP header. In T1.3 it sends an ICMP echo message
	with the ICMP echo header and a data field which is zero-filled.
	The actual length of the data is 24 bytes (and not 64 bytes as I 
	had mentioned before). So if you mean "zero-filled" when you say
	"empty", then you are right about T1.3.

	We found that the new ICMP echo message worked with all the IP
	nodes we tested against. Are you saying that it doesn't work with
	the ODS-Bridges?

	Rahul.
4356.4"empty" = "zero-filled" !ZUR01::FRICKERTue Jan 12 1993 05:3612
    
    
    when I say "empty" I mean "zero-filled" .
    
    
    The ODS-Bridge ( HW-Type: ODS294-SB-AU , Firmware: 3.06) at my customer 
    site doesn't work with a data filed which is zero-filled.
    
    
    Kurt
4356.5MOLAR::YAHEY::BOSETue Jan 12 1993 09:535
	File it as a QAR and we will take care of it in the next version.
	(It is already too late to fix it for V1.3).

	Rahul.