AtiStackInfo-MIB

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Organization: Allied Telesyn International

Last Updated: 2004-07-27

Category: Device Management, Vendor: Allied Telesis

Description: Reports stacking topology, member switch IDs, and inter-unit link status for Allied Telesyn stackable switch systems.

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What Is AtiStackInfo-MIB?

AtiStackInfo-MIB is Allied Telesyn's (Allied Telesis) private MIB for managing stacking topology on its next-generation Layer 2 switches, used when multiple physical switches are joined into a single logical stack. It exposes stack-wide configuration (stack mode, discovery control, number of remote members) and a per-member stack table listing each switch's stack ID, MAC address, name, operating mode, software version, and hardware model. It is explicitly used to monitor hardware and software status of stack members -- confirming each unit's model and firmware/software version, verifying its stacking connection state, and detecting a member that has dropped out of the stack or is running mismatched firmware. This module is a vendor-private extension layered on top of standard bridge/interface MIBs used elsewhere on the switch rather than a re-implementation of them. It is deployed in wiring-closet and campus network environments, making AtiStackInfo-MIB SNMP monitoring standard practice for Allied Telesyn stackable Layer 2 switches configured as a single manageable stack.

IPNetwork Monitor allows you to monitor SNMP objects defined in AtiStackInfo-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Allied Telesyn (Allied Telesis) stackable Layer 2 switch

Monitoring Examples

An administrator polls atiswitchEnhStackTable/atiswitchEnhStackEntry to enumerate all members by atiswitchEnhStackSwId, checking atiswitchEnhStackSwSoftwareVersion for firmware mismatches across the stack and atiswitchEnhStackSwModel to confirm hardware compatibility. The atiswitchEnhStackConnect and atiswitchEnhStackSwMode objects reveal whether a given unit is properly joined to the stack or operating disconnected, which would explain why that unit's ports stopped forwarding traffic.

What Can Be Monitored

stack member ID and MAC address
stack member software/firmware version
stack member hardware model
stack connection/join status
stack mode and discovery state

Imported Objects

From RFC1155-SMI

enterprises

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString
TruthValue

How to Use in IPNetwork Monitor

Example using atiswitchEnhStackRemoteNumber OID:

Select an Allied Telesyn (Allied Telesis) stackable Layer 2 switch (legacy) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type atiswitchEnhStackRemoteNumber into the Find box to locate it in the OID tree, then select it and click OK. It reports the total number of remote switches detected by the Master. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is an Integer32-type OID, Value bounds is the most useful condition here — trigger an alert if the count changes from its expected baseline, since that would indicate the underlying set of items changed unexpectedly. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
alliedTelesyn	1.3.6.1.4.1.207			Private MIB for ATI next generation layer 2 switches. This MIB contains stacking related groups.
mibObject	1.3.6.1.4.1.207.8
atiStackInfoMib	1.3.6.1.4.1.207.8.16
atiswitchEnhancedStacking	1.3.6.1.4.1.207.8.16.1
INT atiswitchEnhStackMode	1.3.6.1.4.1.207.8.16.1.1	INTEGER	read-write	Enhanced stacking mode of the switch. - Master: You will be able to access the user interface of other switches from this switch and be able to configure the remote switch. Other Masters can also access this switch. - Slave: This switch will not be able to access and configure other switches but Masters can access this switch remotely. - Unavailable: It cannot access any other switches and also no Masters can access this switch. It can only be configured locally.
INT atiswitchEnhStackDiscover	1.3.6.1.4.1.207.8.16.1.2	INTEGER	read-write	Before accessing the enhanced stack, the stack has to be discovered by setting this object to 'discover'. The user is requested to wait for a couple of seconds before accessing the stack as it takes some time for all the remote switches to be identified. Setting the value to 'do-not-discover' has no effect.
I32 atiswitchEnhStackRemoteNumberEx	1.3.6.1.4.1.207.8.16.1.3	Integer32	read-only	Total number of remote switches detected by the Master. It will also be equal to the number of entries in atiswitchEnhStackTable.
atiswitchEnhStackTable	1.3.6.1.4.1.207.8.16.1.4		not-accessible	This table contains the list of all remote switches accessible from a Master switch.
atiswitchEnhStackEntry	1.3.6.1.4.1.207.8.16.1.4.1		not-accessible	An entry in the atiswitchEnhStackTable describing the remote switch.
INT atiswitchEnhStackSwId	1.3.6.1.4.1.207.8.16.1.4.1.1	INTEGER	read-only	Entry number of the remote switch in the table. It is also the index into the table.
MAC atiswitchEnhStackSwMacAddr	1.3.6.1.4.1.207.8.16.1.4.1.2	MACAddress	read-only	MAC address of the remote switch.
STR atiswitchEnhStackSwName	1.3.6.1.4.1.207.8.16.1.4.1.3	DisplayString	read-only	Name of the remote switch.
STR atiswitchEnhStackSwMode	1.3.6.1.4.1.207.8.16.1.4.1.4	DisplayString	read-only	Mode of the remote switch - whether it is a Master or a Slave.
STR atiswitchEnhStackSwSoftwareVersion	1.3.6.1.4.1.207.8.16.1.4.1.5	DisplayString	read-only	Software version running in the remote switch.
STR atiswitchEnhStackSwModel	1.3.6.1.4.1.207.8.16.1.4.1.6	DisplayString	read-only	Model name of the remote switch.
T/F atiswitchEnhStackConnect	1.3.6.1.4.1.207.8.16.1.4.1.7	TruthValue	read-write	Setting this to 'true' will establish a connection with the remote switch. Only one entry in the table can have this value set to 'true' at any point of time. During a remote access, setting its value to 'false' will terminate the remote access.

RFC description

ATI private MIB for network stack information and diagnostic parameters on ATI network devices.

Start monitoring Allied Telesyn (Allied Telesis) stackable Layer 2 switches (legacy) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download AtiStackInfo-MIB