EXTREME-MLAG-MIB

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Organization: Extreme Networks, Inc.

Last Updated: 2012-08-08

Category: Technology: High Availability, Technology: Link Aggregation, Vendor: Extreme Networks

Description: Extreme Networks MIB for Multi-chassis Link Aggregation (MLAG), enabling configuration and status monitoring of MLAG peer links.

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What Is EXTREME-MLAG-MIB?

EXTREME-MLAG-MIB is an Extreme Networks vendor MIB for Multi-chassis Link Aggregation (MLAG), which lets two physical switches present as a single logical aggregation endpoint to a downstream device for redundancy. It exposes MLAG peer configuration, peer-link status, and per-MLAG-group membership and synchronization state. As a hardware/software status MIB it's used to monitor the health of the MLAG peer relationship — detecting whether the inter-chassis peer link is up, whether the peer switch is reachable, and whether an MLAG group has fallen out of sync, all of which indicate a loss of redundancy even if traffic is still flowing on one side. It depends conceptually on standard link-aggregation (802.3ad) and Extreme's own switching stack, since MLAG is a proprietary extension of standard LAG across chassis. It's typically deployed in data-center or campus core/distribution layers where pairs of ExtremeXOS switches provide redundant, chassis-independent uplinks or server connections. Engineers can download the EXTREME-MLAG-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in EXTREME-MLAG-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

Extreme Networks ExtremeXOS-based switch (paired/stacked deployment)
Extreme Networks ExtremeXOS switches (MLAG-capable, e.g. Summit/BlackDiamond series)

Monitoring Examples

No sample objects were provided for this module, so specific table names can't be confirmed; based on its description, an admin would typically poll MLAG peer-link status and per-group synchronization state, where a peer link reporting down or a group marked out-of-sync would indicate the redundant switch pair has lost its failover capability.

What Can Be Monitored

MLAG peer link status
peer reachability
MLAG group synchronization state
MLAG group membership

Imported Objects

From EXTREME-BASE-MIB

extremeAgent

OBJECT-IDENTITY

From INET-ADDRESS-MIB

InetAddress
InetAddressType

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DisplayString
MacAddress
RowStatus
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using extremeMlagPeerRxHellos OID:

Select an Extreme Networks ExtremeXOS switch 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 extremeMlagPeerRxHellos into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. It reports the number of Hellos received from the peer. 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 a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
extremeMlag	1.3.6.1.4.1.1916.1.41			Extreme Networks Multi-Switch LAG MIB
extremeMlagObjects	1.3.6.1.4.1.1916.1.41.1
extremeMlagPeerTable	1.3.6.1.4.1.1916.1.41.1.1		not-accessible	This table contains MLAG peer entries. This table contains a MLAG peer switch association structure, associates an MLAG peer structure with an MLAG peer switch IP address. Displays User configured items, MLAG peer switch state, MLAG port count and health-check statistics.
extremeMlagPeerEntry	1.3.6.1.4.1.1916.1.41.1.1.1		not-accessible	An entry in the MLAG Peer Table
STR extremeMlagPeerName	1.3.6.1.4.1.1916.1.41.1.1.1.1	DisplayString	read-create	The name of the MLAG Peer switch. MLAG Peer names must be alpha-numeric and must start with an alpha character.
STR extremeMlagPeerVlan	1.3.6.1.4.1.1916.1.41.1.1.1.2	DisplayString	read-only	The name of the VLAN through which the MLAG Peer can be reached.
STR extremeMlagPeerVR	1.3.6.1.4.1.1916.1.41.1.1.1.3	DisplayString	read-write	The name of the VR with which the MLAG peer VLAN is associated with.
IPt extremeMlagLocalAddrType	1.3.6.1.4.1.1916.1.41.1.1.1.4	InetAddressType	read-write	The IP address type of the extremeMlagLocalIP object.
IP extremeMlagLocalIP	1.3.6.1.4.1.1916.1.41.1.1.1.5	InetAddress	read-write	Local Switch IPAddress of ISC connection.
IPt extremeMlagPeerAddrType	1.3.6.1.4.1.1916.1.41.1.1.1.6	InetAddressType	read-write	The IP address type of the extremeMlagPeerIP object.
IP extremeMlagPeerIP	1.3.6.1.4.1.1916.1.41.1.1.1.7	InetAddress	read-write	MLAG peer IP address for the ISC. The specified IP address must be contained within an existing direct route.
I32 extremeMlagPeerPortCount	1.3.6.1.4.1.1916.1.41.1.1.1.8	Integer32	read-only	Number of MLAG Ports associated with this MLAG peer
INT extremeMlagPeerCheckPointStatus	1.3.6.1.4.1.1916.1.41.1.1.1.9	INTEGER	read-only	Checkpointing Status of this MLAG peer
C32 extremeMlagPeerRxHellosEx	1.3.6.1.4.1.1916.1.41.1.1.1.10	Counter32	read-only	Number of Hellos received from the peer
C32 extremeMlagPeerRxCheckpointMsgs	1.3.6.1.4.1.1916.1.41.1.1.1.11	Counter32	read-only	Number of Checkpoint Messages received from the peer
C32 extremeMlagPeerHelloErrors	1.3.6.1.4.1.1916.1.41.1.1.1.12	Counter32	read-only	Number of Hello Error Messages
C32 extremeMlagPeerHelloTimeouts	1.3.6.1.4.1.1916.1.41.1.1.1.13	Counter32	read-only	Number of Hello Timeout Messages
TIM extremeMlagPeerUptime	1.3.6.1.4.1.1916.1.41.1.1.1.14	TimeStamp	read-only	Specifies the time that the Connectivity with the peer is up
I32 extremeMlagPeerLocalTxInterval	1.3.6.1.4.1.1916.1.41.1.1.1.15	Integer32	read-write	Length of the time in milli seconds between health check hello packets transmitted by this switch.
I32 extremeMlagPeerRemoteTxInterval	1.3.6.1.4.1.1916.1.41.1.1.1.16	Integer32	read-only	Transmitting Hello Interval of Peer Switch in milli seconds
C32 extremeMlagPeerTxHellos	1.3.6.1.4.1.1916.1.41.1.1.1.17	Counter32	read-only	Number of Health Check Hellos transmitted
C32 extremeMlagPeerTxCheckpoints	1.3.6.1.4.1.1916.1.41.1.1.1.18	Counter32	read-only	Number of transmitted Checkpoint messages
C32 extremeMlagPeerCheckpointErrors	1.3.6.1.4.1.1916.1.41.1.1.1.19	Counter32	read-only	Number of Checkpoint Errors
C32 extremeMlagPeerConnnectErrors	1.3.6.1.4.1.1916.1.41.1.1.1.20	Counter32	read-only	Number of Peer Connect errors
ROW extremeMlagPeerRowStatus	1.3.6.1.4.1.1916.1.41.1.1.1.21	RowStatus	read-create	The status of this entry
MAC extremeMlagPeerCfgLacpMac	1.3.6.1.4.1.1916.1.41.1.1.1.22	MacAddress	read-only	This MAC address specifies the MLAG LACP MAC configured on this switch. If configured, this MAC is used as the System Identifier in the LACPDUs sent over the MLAG Ports. If not configured, the MAC address of MLAG peer having highest IP address for ISC control VLAN is chosen as the System Identifier in the LACPDUs sent over the MALG ports.
MAC extremeMlagPeerOperLacpMac	1.3.6.1.4.1.1916.1.41.1.1.1.23	MacAddress	read-only	This MAC address specifies the MLAG LACP MAC that is being used as the System Identifier in the LACPDUs sent over the MLAG Ports. This may be different from extremeMlagPeerCfgLacpMac if same extremeMlagPeerCfgLacpMac is not configured on both the MLAG peers.
extremeMlagPortTable	1.3.6.1.4.1.1916.1.41.1.2		not-accessible	This table contains Mlag port entries. Binds a local port or LAG port to an MLAG port uniquely indentified by the MLAG Id value. Once the MLAG group binding is made, any change to load sharing on MLAG ports is disallowed. Displays User configured items, MLAG peer switch state, port count and health-check statistics.
extremeMlagPortEntry	1.3.6.1.4.1.1916.1.41.1.2.1		not-accessible	An entry in the MLagPortTable
U32 extremeMlagPortLocalPortIfIndex	1.3.6.1.4.1.1916.1.41.1.2.1.1	Unsigned32	read-write	The ifIndex of the local member port of the MLAG port. The specified port ifIndex may be a single port or the master port of a load share port but should not be a load share member port.
I32 extremeMlagPortId	1.3.6.1.4.1.1916.1.41.1.2.1.2	Integer32	read-create	The identifier which is used to identify the MLAG port
STR extremeMlagPortPeer	1.3.6.1.4.1.1916.1.41.1.2.1.3	DisplayString	read-write	This object identifies the MLAG peer switch with which this port is associated
INT extremeMlagPortLocalLinkStatus	1.3.6.1.4.1.1916.1.41.1.2.1.4	INTEGER	read-only	Local MLAG Port Status, that can be Active/Disabled/Ready/Port not present. It reflects the status of entire LAG when LAG is used in conjunction with MLAG.
INT extremeMlagPortRemoteLinkStatus	1.3.6.1.4.1.1916.1.41.1.2.1.5	INTEGER	read-only	Remote MLAG Port Status, which can be Up(1) - One or more links are active on the remote switch or Down(2)- No links are active on the remote switch or N/A(3) - The peer has not communicated link state for this MLAG group. It reflects the status of entire LAG when LAG is used in conjunction with MLAG.
INT extremeMlagPortPeerState	1.3.6.1.4.1.1916.1.41.1.2.1.6	INTEGER	read-only	MLAG Peer Switch State, up/down
C32 extremeMlagPortLocalFailures	1.3.6.1.4.1.1916.1.41.1.2.1.7	Counter32	read-only	Gives the number of ports that are down in the local MLAG port.
C32 extremeMlagPortRemoteFailures	1.3.6.1.4.1.1916.1.41.1.2.1.8	Counter32	read-only	Gives number of ports that are down in the remote MLAG port
ROW extremeMlagPortRowStatus	1.3.6.1.4.1.1916.1.41.1.2.1.9	RowStatus	read-create	The status of this entry.
INT extremeMlagConvergenceControl	1.3.6.1.4.1.1916.1.41.1.3	INTEGER	read-write	This object specifies if an ACL can be used on an MLAG port to achieve faster convergence. If an ACL is used, better convergence times can be achieved irrespective of the number of FDB entries present on the MLAG port. The second time can be chosen when convergence time is not an issue and ACLs are to be preserved.
extremeMlagNotificationObjects	1.3.6.1.4.1.1916.1.41.2
extremeMlagNotifications	1.3.6.1.4.1.1916.1.41.3
extremeMlagNotificationsPrefix	1.3.6.1.4.1.1916.1.41.3.0
NTF extremeMlagPeerUp	1.3.6.1.4.1.1916.1.41.3.0.1			This trap is sent when the MLAG peer comes up.
NTF extremeMlagPeerDown	1.3.6.1.4.1.1916.1.41.3.0.2			This notification is sent when health check messages are not received from the peer MLAG switch for 3 times the configured hello interval.

RFC description

Extreme Networks multi-switch link aggregation (MLAG) configuration and peer status monitoring.

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Download EXTREME-MLAG-MIB