ZYXEL-IP-FORWARD-MIB

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Organization: Enterprise Solution ZyXEL

Last Updated: 2012-07-01

Category: ZyXEL Routing and IP Services

Description: Covers configuration of the ZyXEL IP forwarding table and its associated routing parameters, used for Layer 3 packet switching.

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What Is ZYXEL-IP-FORWARD-MIB?

ZYXEL-IP-FORWARD-MIB is a ZyXEL vendor module covering the IP forwarding subtree, managing the device's Layer 3 routing table and related IP packet-forwarding parameters. It exposes the routing table entries used to determine how the device forwards IP packets, including destination networks, next-hop addresses, and route metrics. Its monitoring value is in verifying the software/configuration status of Layer 3 forwarding — confirming expected routes are present and correctly weighted — which helps catch a missing or misconfigured route causing traffic black-holing or asymmetric routing. It parallels the standard IP-FORWARD-MIB (RFC 2096/4292) conventions for route-table representation while adding ZyXEL-specific handling, and network engineers commonly perform a ZYXEL-IP-FORWARD-MIB download from ZyXEL's support site to compile it alongside the standard IP-FORWARD-MIB. It is deployed on ZyXEL routers and Layer 3 switches in small-to-midsize business networks.

IPNetwork Monitor allows you to monitor SNMP objects defined in ZYXEL-IP-FORWARD-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

ZyXEL routers and Layer 3 switches, small-to-midsize business networks

Monitoring Examples

An admin would poll the IP forwarding table to confirm a specific destination network's route entry is present with the expected next-hop and metric. The unexpected disappearance of a route, or a next-hop pointing to the wrong gateway, would reveal a routing failure or misconfiguration on the ZyXEL device; no sample object names were provided for this MIB, so exact table/column identifiers can't be confirmed beyond this general IP-forwarding pattern.

What Can Be Monitored

IP forwarding/routing table entries
route destination and next-hop
route metric
routing table size

Imported Objects

From SNMPv2-SMI

IpAddress
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString

From ZYXEL-ES-SMI

esMgmt

OBJECT-IDENTITY

How to Use in IPNetwork Monitor

Example using zyIpRouteMetric OID:

Select a Zyxel XGS2220 Series (2023) 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 zyIpRouteMetric 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 routing metric (cost) associated with a specific IP route entry. 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 INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the metric for a critical route changes unexpectedly, which can signal a route flap or an unwanted path change. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
IP zyHostIpAddress	1.3.6.1.4.1.890.1.15.3.32.2.1.1.1	IpAddress	not-accessible	The IP address of the incoming packets from which device.
STR zyHostPort	1.3.6.1.4.1.890.1.15.3.32.2.1.1.3	DisplayString	read-only	Port number from which the above IP address was learned. This field displays CPU to indicate the IP address belongs to the switch.
INT zyHostType	1.3.6.1.4.1.890.1.15.3.32.2.1.1.4	INTEGER	read-only	Show whether the IP address is dynamic or static.
INT zyHostVid	1.3.6.1.4.1.890.1.15.3.32.2.1.1.2	INTEGER	not-accessible	VLAN group to which the packet belongs.
IP zyIpRouteDestinationIpAddress	1.3.6.1.4.1.890.1.15.3.32.3.1.1.1	IpAddress	not-accessible	The destination IP address of the route domain.
INT zyIpRouteDestinationMaskBits	1.3.6.1.4.1.890.1.15.3.32.3.1.1.2	INTEGER	not-accessible	The mask bits of the route domain.
IP zyIpRouteGateway	1.3.6.1.4.1.890.1.15.3.32.3.1.1.3	IpAddress	not-accessible	The IP address of the gateway device.
IP zyIpRouteIf	1.3.6.1.4.1.890.1.15.3.32.3.1.1.4	IpAddress	read-only	The IP address of the interface.
INT zyIpRouteMetricEx	1.3.6.1.4.1.890.1.15.3.32.3.1.1.5	INTEGER	read-only	The cost of the route.
INT zyIpRouteType	1.3.6.1.4.1.890.1.15.3.32.3.1.1.6	INTEGER	read-only	The method used to learn the route.
IP zyRouteDomainIpAddress	1.3.6.1.4.1.890.1.15.3.32.1.1.1.1	IpAddress	not-accessible	IP address of your switch in dotted decimal notation. This is the IP address of the switch in an IP routing domain.
INT zyRouteDomainIpMaskBits	1.3.6.1.4.1.890.1.15.3.32.1.1.1.2	INTEGER	not-accessible	IP subnet mask of an IP routing domain.
INT zyRouteDomainVid	1.3.6.1.4.1.890.1.15.3.32.1.1.1.3	INTEGER	read-only	VLAN identification number to which an IP routing domain belongs.
zyxelHostEntry	1.3.6.1.4.1.890.1.15.3.32.2.1.1		not-accessible	An entry contains host information.
zyxelHostStatus	1.3.6.1.4.1.890.1.15.3.32.2
zyxelHostTable	1.3.6.1.4.1.890.1.15.3.32.2.1		not-accessible	The table contains host information.
zyxelIpForward	1.3.6.1.4.1.890.1.15.3.32			The subtree for ip forward
zyxelIpRouteEntry	1.3.6.1.4.1.890.1.15.3.32.3.1.1		not-accessible	An entry contains IP route information.
zyxelIpRouteStatus	1.3.6.1.4.1.890.1.15.3.32.3
zyxelIpRouteTable	1.3.6.1.4.1.890.1.15.3.32.3.1		not-accessible	The table contains IP route information.
zyxelRouteDomainEntry	1.3.6.1.4.1.890.1.15.3.32.1.1.1		not-accessible	An entry contains route domain information.
zyxelRouteDomainStatus	1.3.6.1.4.1.890.1.15.3.32.1
zyxelRouteDomainTable	1.3.6.1.4.1.890.1.15.3.32.1.1		not-accessible	The table contains route domain information.

RFC description

Manages ZyXEL IP forwarding table and routing parameters for Layer 3 packet switching configuration.

Start monitoring ZyXEL routers and Layer 3 switches, small-to-midsize business networks (IP forwarding/routing-table config status) 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 ZYXEL-IP-FORWARD-MIB