Conference netcad::hub_mgnt

2244.0. "SNMP set to switch900 with MIB browser" by UTRTSC::GROOT_R (Ronald de Groot) Tue May 02 1995 11:27

Hello,

I have a customer who will use MCC to set via the MIBbrowser the bridge
ports of the DECswitch900MX to the disabled state. He used the SNMP
command ifAdminStatus to set the port but this is not working on the switch. 

When this command is used on a  DECbridge90 this works! I have try to find 
out why this is not working on the DECswitch900 but now I am completed lost.

What I tryid to find out is how HUBwatch is set this ports. What I see
is that HUBwatch used Spanning Tree commands to set a port on a 
DECswitch900 (but also for the GIGAswitch) disabled or enabled?

To disable a port on the DECswitch900 the following SNMP command is
used by HUBwatch,
	dot1dStpPortEnable 1.3.6.1.2.1.17.2.15.1.4.7 integer = 2 
					( blocking port 7 )
        or better                mib-2.17.2.15.1.4.7 object value = 2

The DECbridge90 used the same command to disable spanning tree and
the ifAdminStatus to disable the port.

For the Gigaswitch HUBwatch used the command,
	ebrIfSpanTurnOffStatus 1.3.6.1.4.1.36.2.18.1.4.13.1.1.2 integer = 2
                 (private MIB)            ( blocking FDDI port 2 )

My quistion is why used HUBwatch and DECswitches snmp dot1dStpPortEnable to
disable and enable ports?
When HUBwatch used dot1dStpPortEnable and not ifAdminStatus is there an orther
way to set ports on a DECswitch900?  Maybe a dec-hub900-switch-mib?

This is a security issue for the customer because he will set the ports 
disabled between e.g. 05:00pm and 10:00am. (In a batch job) Between this hours
the Amsterdam Stock Exchange is closed.

	Ronald

 

     
 
 

HUBwatch uses exactly the same code to control ports for all of the
following devices: RoamAbout Access, DECbridge 900MX, DECswitch 900EE, 900EF,
PEswitch 900TX, and the GIGAswitch/FDDI.  (The DECbridge 90's use different
code.) 

Port enable and disable is done through the dot1dStpPortEnable variable.
This variable still allows management commands for the port, but disallows
all other traffic.  enabled is 1, disabled is 2.

Tom Hood
HUBwatch

    Tom,
    
    Thank you for your quick response. But when this code is used to
    control ports of the devices you write in .1 this mean that there
    is no way to enable and disable ports with a MIB browser using the
    the standard_bridge_mib?
    
    Ronald

It's the dot1d MIB.