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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

2654.0. "Cabletron and portSourceAddr" by CSC32::WOESTEMEYER (Why??...Why not!!!) Mon Mar 30 1992 20:24

Looking for some SNMP help with Cabletron equipment.  The customer has
Cabletron Hubs, he is evaluating several types of management platforms
one of which is DECmcc.  He has installed the TCPIP access module, V1.1 
and added V1.2 of the Cabletron MIB.  

One of the pieces of information he is looking at is portSourceAddr.
Using 2 of the different platforms he is evaluating he gets the desired 
list of source addresses seen on a board/port.  With DECmcc all he
gets back is 'attribute not gettable'.  

The customer then used a LAN analyzer with an SNMP decoder. From the 2
platforms that work he sees packets containing the following request:

	{1 3 6 1 4 1 52 1 2 2 4 1 4.Board.Port.1}

	Using DECmcc:

	{1 3 6 1 4 1 52 1 2 2 4 1 4.Board.Port}

	The FCL command he is using is:

	MCC> show snmp entity_name cabletron commonp (x,y) portsourceaddr

	where (x,y) is the board and port of interest.

It would seem that the TCPIP access module is dropping an index into the
source address table.  He has tried serveral variations of the command to 
add another index, all of which return 'comma is missing'.

Is there a way to retuen the list of source address seen on a board and port
in DECmcc, or is this not implemented at this time?

Thanks in advance for any and all suggestions,
Steve Woestemeyer
CSC/CS - Network Support Team
T.RTitleUserPersonal
Name
DateLines
2654.1This problem already has a solution....(wish I could say that all the time)YAHEY::BOSEWed Apr 01 1992 13:476
	Steve,
		This problem has been reported and discussed previously.
	Please see Note #1921 for the solution.

	Rahul.
2654.2Same customer as 1921.7CSC32::WOESTEMEYERWhy??...Why not!!!Wed Apr 01 1992 15:318
    Rahul,
    
    The customer that I refered to in .0, is the same customer that is
    refered to in 1921.7.  I was the one that gave him the mib compiler
    that he has had some success with.  This is a new problem.  1921.11
    refers to a new cabletron mib, would this help his problem?
    
    Steve
2654.3Experiment by CustomerCSC32::WOESTEMEYERWhy??...Why not!!!Wed Apr 01 1992 17:5521
 Contacted customer, he told me of an experiment he ran. 

He edited the mib, and added a new entry to the portSourceAddr object 
type index.

As supplied:
INDEX { boardIndex, portIndex }
::={commonP 4}

As Edited:
INDEX { boardIndex, portIndex, portIndex }
::={commonP 4}


He then recompiled the MIB and he could enter another index to the 
request via the SMNP access module.  This allowed him to retrieve 
addresses, however it broke the rest of the commonP attributes.

He backed out the change.


2654.4Cabletron agent has a bug ....YAHEY::BOSEWed Apr 01 1992 18:4034
	I re-read your original note and it looks like the cabletron agent
	has a bug. The object  portSourceAddr is defined as follows in their
	mib :

	portSourceAddr     OBJECT-TYPE
	SYNTAX  OCTET STRING
	ACCESS  read-only
	STATUS  mandatory
	DESCRIPTION
	     "A source address that has been seen on this port."
	INDEX { boardIndex, portIndex }
	::= { commonP 4 }

	The object identifier for commonP is "1.3.6.1.4.1.52.1.2.2.4.1".
	According to SMI, to do a get operation on this object, the object
	identifier specified should be :
		"1.3.6.1.4.1.52.1.2.2.4.1.4.boardIndex.portIndex"
	which is precisely what DECmcc is sending out in their PDU. The 
	reason why other management stations work is because they are
	probably starting at the top of the table and doing a GetNext 
	operation to get the "lexinext" object, in which case the management
	station does not need to specify the instance data. 

		Following the same argument the DECmcc command :
	MCC> show snmp entity_name cabletron commonp * all attr
	should work, but 
	MCC> show snmp entity_name cabletron commonp (x,y) all attr
	should not work.

		Can you tell the customer to try out the above to either
	prove or disprove the premise.

	Rahul.
2654.5Output of SHOW snmp for cabletronCSC32::WOESTEMEYERWhy??...Why not!!!Thu Apr 02 1992 16:45134
Rahul,

As you asked I had the customer, Martin Marietta, do the 'show' commands 
you asked for.  The customer is using the SNMP compiler supplied for
his original SNMP problem. So I expected both commands to work, which in 
fact they did. 

Attached is a partial log file of the output as well as a section from 
anal/image for the compiler.

Steve
--------------------------------------------------------------------------
********* MCC STUFF *******


show mcc 0 all char
!
!MCC 0 
!AT  2-APR-1992 11:18:18 Characteristics
!
!Examination of Attributes Shows:
!                      Component Version = V1.1.0
!               Component Identification = "DECmcc"
!
show mcc 0 tcpip_am all char
!
!MCC 0 TCPIP_AM 
!AT  2-APR-1992 11:18:38 Characteristics
!
!Examination of attributes shows:
!                      Component Version = V1.1.1
!               Component Identification = "DECmcc TCP/IP SNMP AM"
!                            UDP Timeout = 5
!                            UDP Retries = 2
!
!
show snmp mmctw2 cabletron commonp * all attr
!
!SNMP mmctw2 cabletron commonP (1,1) 
!AT  2-APR-1992 11:19:15 All Attributes
!
!                          commonP_Index = ( 1,
!                                            1 )
!                         portAdminState = on
!                              portIndex = 1
!                          portMediaType = 177
!                         portSourceAddr = -- Attribute Not Gettable
!
!SNMP mmctw2 cabletron commonP (1,2) 
!AT  2-APR-1992 11:20:05 All Attributes
!
!                          commonP_Index = ( 1,
!                                            2 )
!                         portAdminState = off
!                              portIndex = 2
!                          portMediaType = 177
!                         portSourceAddr = -- Attribute Not Gettable
!
!SNMP mmctw2 cabletron commonP (2,1) 
!AT  2-APR-1992 11:20:06 All Attributes
!
!                          commonP_Index = ( 2,
!                                            1 )
!                         portAdminState = on
!                              portIndex = 1
!                          portMediaType = 98
!                         portSourceAddr = -- Attribute Not Gettable
!
!SNMP mmctw2 cabletron commonP (2,2) 
!AT  2-APR-1992 11:20:11 All Attributes
!
!                          commonP_Index = ( 2,
!                                            2 )
!                         portAdminState = on
!                              portIndex = 2
!                          portMediaType = 98
!                         portSourceAddr = -- Attribute Not Gettable
!
!SNMP mmctw2 cabletron commonP (2,3) 
!AT  2-APR-1992 11:20:13 All Attributes
!
!                          commonP_Index = ( 2,
!                                            3 )
!                         portAdminState = on
!                              portIndex = 3
!                          portMediaType = 98
!                         portSourceAddr = -- Attribute Not Gettable
!
..
..
..
!
!SNMP mmctw2 cabletron commonP (8,23) 
!AT  2-APR-1992 11:23:19 All Attributes
!
!                          commonP_Index = ( 8,
!                                            23 )
!                         portAdminState = on
!                              portIndex = 23
!                          portMediaType = 98
!                         portSourceAddr = -- Attribute Not Gettable
!
!SNMP mmctw2 cabletron commonP (8,24) 
!AT  2-APR-1992 11:23:21 All Attributes
!
!                          commonP_Index = ( 8,
!                                            24 )
!                         portAdminState = on
!                              portIndex = 24
!                          portMediaType = 98
!                         portSourceAddr = -- Attribute Not Gettable
!
show snmp mmctw2 cabletron commonp (8,24) all attr
!
!SNMP mmctw2 cabletron commonP (8,24) 
!AT  2-APR-1992 11:24:03 All Attributes
!
!                          commonP_Index = ( 8,
!                                            24 )
!                         portAdminState = on
!                              portIndex = 24
!                          portMediaType = 98
!                         portSourceAddr = -- Attribute Not Gettable
!
---------------------------------------------------------------------
From analyze/image sys$system:mcc_tcpip_mtu

	Image Identification Information

		image name: "MCC_TCPIP_MTU"
		image file identification: "MCCMTU T1.1-B"
		link date/time:  9-JAN-1992 16:50:34.24
		linker identification: "05-05"