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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

3112.0. "ipReachability (PING) failures." by SUBWAY::REILLY (Mike Reilly - New York Bank District) Mon Jun 01 1992 20:38

    Does the TCPIP-AM perform more than one ping to determine the
    ipReachability status. I have a number of rules which check the
    value of the ipReachability and other SNMP variables on some
    routers. The rules based on the ipReacahbility often state that the
    device is unreachable, but the rules based on 'real' snmp variables
    never fail.  I am working on a rather busy network.  It appears that
    there is a retry for SNMP queries but this retry does not exist for
    the ipReachability variable.  
    
    - Mike

T.R	Title	User	Personal Name	Date	Lines
3112.1	No retries on ping...	DANZO::CARR		`Tue Jun 02 1992 12:40`	5
	You are correct, there are no retries for ping. If the ping is timing out you can adjust the icmp timeout attribute. Dan
3112.2	Timeout won't help	MARVIN::COBB	Graham R. Cobb (Wide Area Comms.), REO2-G/H9, 830-3917	`Tue Jun 02 1992 14:17`	8
	Increasing the timeout probably won't help. MCC really needs to do retries. On a busy network packets may get lost (especially if they have to go from LAN to WAN). Increasing timeout helps with slow networks. Increasing retries helps with busy networks. Graham
3112.3	QAR 3096	TOOK::MINTZ	Erik Mintz, dtn 226-5033	`Tue Jun 02 1992 14:36`	2
	QAR 3096, but not likely to be addressed in time for V1.2
3112.4	Would like to see retries.	SUBWAY::REILLY	Mike Reilly - New York Bank District	`Tue Jun 02 1992 15:51`	5
	Thanks for the prompt reply. Add my vote for the addition of a variable number of retries on the ping. If it is easier just have three retries spaced one second apart. - Mike
3112.5	QAR answer	TOOK::MINTZ	LKG2-2 near pole X3, cube 6072, dtn 226-5033	`Mon Oct 26 1992 19:18`	11
	The answer to QAR 03096 has arrived. Do you wish to see it [Y]? Retries will be added in a subsequent release (post V1.2). ---update 30-sep-1992--- Ping retry has been added. <And will be available in a future release>