INTEL-L3TC-MIB

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Category: Textual Conventions and Registries, Vendor: Intel

Description: Intel Layer 3 textual conventions MIB defining data types used across Intel Layer 3 switching and routing MIBs.

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What Is INTEL-L3TC-MIB?

INTEL-L3TC-MIB is Intel's private MIB providing shared textual conventions and supporting objects used across Intel's Layer 3 switching/routing MIB family, including front-panel port configuration and a server-load-balancing "servers" table used for health-checking backend application servers. It exposes front-port count and mode configuration, plus a servers table listing configured server IP addresses, port numbers, names, and heartbeat URLs used to verify server reachability, with an entry-delete control object. As a monitoring MIB it is used to check the software/service health of load-balanced backend servers, since polling whether a server's heartbeat URL check is succeeding is central to detecting an application server that has gone down or is failing health checks behind an Intel Layer 3 switch's load balancer. There is no explicit dependency on other standard MIBs; it acts as a shared conventions module for other Intel Layer 3 MIBs. It is typically deployed on Intel Layer 3 switches performing server load balancing (SLB) in front of application server farms, making the INTEL-L3TC-MIB reference essential for tracking backend server health checks.

IPNetwork Monitor allows you to monitor SNMP objects defined in INTEL-L3TC-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

Intel Layer 3 switches (server load balancing)

Monitoring Examples

An administrator polling l3tcServersTable/l3tcServersEntry by l3tcServersIndex can check l3tcServersIpAddress, l3tcServersPortNumber, and l3tcServersHeartBeatUrl to confirm a backend server is configured for health checking and identify which server (l3tcServersName) has failed if the switch stops sending it traffic. l3tcFrontPortsTable/l3tcFrontPortsEntry exposes l3tcFrontPortsNumber and l3tcFrontPortsMode, letting an admin verify the front-panel port count and operating mode configured on the switch.

What Can Be Monitored

backend server IP/port/heartbeat URL health check configuration
server name identity
front-panel port count and mode

Imported Objects

From INTEL-GEN-MIB

mib2ext

OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

IpAddress

From RFC1213-MIB

DisplayString

OIDs

OID symbolic	OID numeric	Type	Access	Description
l3tcache	1.3.6.1.4.1.343.6.37
l3tcFrontPorts	1.3.6.1.4.1.343.6.37.1
l3tcFrontPortsTable	1.3.6.1.4.1.343.6.37.1.1		not-accessible	Numbers and Cache-modes of front ports
l3tcFrontPortsEntry	1.3.6.1.4.1.343.6.37.1.1.1		not-accessible
INT l3tcFrontPortsNumber	1.3.6.1.4.1.343.6.37.1.1.1.1	INTEGER	read-only	Front Port number 1..24 identifying subject front port
INT l3tcFrontPortsMode	1.3.6.1.4.1.343.6.37.1.1.1.2	INTEGER	read-write	Tells the mode (normal/client/server) of the port
l3tcServers	1.3.6.1.4.1.343.6.37.2
l3tcServersTable	1.3.6.1.4.1.343.6.37.2.1		not-accessible	UserGroup membership for prefices of IP-addresses
l3tcServersEntry	1.3.6.1.4.1.343.6.37.2.1.1		not-accessible
INT l3tcServersIndex	1.3.6.1.4.1.343.6.37.2.1.1.1	INTEGER	read-only	Box-wide uniquely identifying number of subject cache server
IP l3tcServersIpAddress	1.3.6.1.4.1.343.6.37.2.1.1.2	IpAddress	read-write	IpAddress of subject cache server
INT l3tcServersDeleteEntry	1.3.6.1.4.1.343.6.37.2.1.1.3	INTEGER	read-write	Write 1 to this attribute to delete entire entry. Write 2 to a non-existing row creates a new row.
INT l3tcServersPortNumber	1.3.6.1.4.1.343.6.37.2.1.1.4	INTEGER	read-write	Identifies the Front Port to which this server is attached
STR l3tcServersHeartBeatUrl	1.3.6.1.4.1.343.6.37.2.1.1.5	DisplayString	read-write	The URL to request when performing heart-beat checking
STR l3tcServersName	1.3.6.1.4.1.343.6.37.2.1.1.6	DisplayString	read-write	The name for identification of the server presented to the operator
INT l3tcServersHeartBeatStatus	1.3.6.1.4.1.343.6.37.2.1.1.7	INTEGER	read-only	Actual status of heart-beat monitoring of server
l3tcTcpPorts	1.3.6.1.4.1.343.6.37.3
l3tcTcpPortsTable	1.3.6.1.4.1.343.6.37.3.1		not-accessible	List of Tcp Port Numbers subject to l3tc-routing
l3tcTcpPortsEntry	1.3.6.1.4.1.343.6.37.3.1.1		not-accessible
INT l3tcTcpPortsNumber	1.3.6.1.4.1.343.6.37.3.1.1.1	INTEGER	read-only	This TCP Port Number is subject to t-cache-forwarding
INT l3tcTcpPortsDeleteEntry	1.3.6.1.4.1.343.6.37.3.1.1.2	INTEGER	read-write	Write 1 to this attribute to delete entire entry. Write 2 to a non-existing row creates a new row.
l3tcStaticIPs	1.3.6.1.4.1.343.6.37.4
l3tcStaticIPsTable	1.3.6.1.4.1.343.6.37.4.1		not-accessible	Operator-assigned servers for particular IP sites
l3tcStaticIPsEntry	1.3.6.1.4.1.343.6.37.4.1.1		not-accessible
IP l3tcStaticIPsPacketDestIP	1.3.6.1.4.1.343.6.37.4.1.1.1	IpAddress	read-only	IP Address of subject IP site
INT l3tcStaticIPsDeleteEntry	1.3.6.1.4.1.343.6.37.4.1.1.2	INTEGER	read-write	Write 1 to this attribute to delete entire entry. Write 2 to a non-existing row creates a new row.
INT l3tcStaticIPsServerIndex	1.3.6.1.4.1.343.6.37.4.1.1.3	INTEGER	read-write	Index value of cache server assigned to subject IP site
l3tcSingleAttrs	1.3.6.1.4.1.343.6.37.5
INT l3tcPollingInterval	1.3.6.1.4.1.343.6.37.5.1	INTEGER	read-write	Interval in seconds between successive heart-beat-polls
INT l3tcEnabled	1.3.6.1.4.1.343.6.37.5.2	INTEGER	read-write	Whether or not the TC routing is enabled
INT l3tcRevertToDefaults	1.3.6.1.4.1.343.6.37.5.3	INTEGER	read-write	This is a bit mask setting selected parts of the configuration to factory defaults. value & 1: causes all front ports to revert to normal mode. All servers referring to a leaving-server-mode frontport are deleted too and all static sites reffering to deleted servers are deleted too. value & 2: removes all servers and all static sites value & 4: removes all TCP-protocols value & 8: removes all static sites value & 16: sets polling interval to 30 seconds and switches off the entire transparent caching facility As an example setting this attribute to the value 31 completely restores factory defaults.

RFC description

Intel Layer 3 transparent caching MIB for managing L3TC cache server configuration.

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Download INTEL-L3TC-MIB

What Is INTEL-L3TC-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description