ZHNLAYER2BRIDGING

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Organization: Zhone Technologies, Inc.

Last Updated: 2012-07-11

Category: Zhone Technologies CPE and Access

Description: Manages Zhone Technologies Layer 2 bridge configuration, port membership, and VLAN filtering tables.

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What Is ZHNLAYER2BRIDGING?

ZHNLAYER2BRIDGING is a Zhone Technologies enterprise MIB defining Layer 2 bridging objects for Zhone's VoIP customer-premises equipment (CPE), covering bridge table capacity limits, port membership, VLAN/traffic filtering, and packet marking rules. It exposes bridge, filter, and marking tables along with global capacity counters (maximum vs. current number of entries) that describe the bridging subsystem's configuration and load. Its monitoring value centers on software/configuration status: administrators poll bridgeStatus and bridgeEnable per bridge entry to confirm bridges are administratively up and operating as expected, and compare bridgeNumberOfEntries/filterNumberOfEntries/markingNumberOfEntries against their max* counterparts to detect a bridging table nearing its configured capacity. It is a Zhone-proprietary extension that would typically sit alongside standard bridge (IEEE 802.1D) and interface MIBs on the same CPE. It is deployed on Zhone VoIP CPE devices where Layer 2 bridging and VLAN filtering must be monitored for correct segmentation of voice and data traffic. Engineers can download the ZHNLAYER2BRIDGING file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ZHNLAYER2BRIDGING. 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

Zhone Technologies VoIP CPE devices

Monitoring Examples

An operator would poll the bridgeTable (bridgeEntry, keyed by bridgeKey) to check bridgeEnable and bridgeStatus for each configured bridge, confirming it's active and not in an error state. Comparing bridgeNumberOfEntries against maxBridgeEntries, and similarly filterNumberOfEntries against maxFilterEntries, reveals whether the CPE's bridging or filtering table is approaching its hard capacity limit, which would cause new entries to be rejected. The availableInterfaceNumberOfEntries object tells an administrator how many interfaces remain available for new bridge port assignments.

What Can Be Monitored

bridge entry enable/status per bridge
bridge/filter/marking table capacity utilization
available interfaces for bridging
VLAN filtering rule configuration

Imported Objects

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero
ifIndex	OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32
enterprises

From SNMPv2-TC

MacAddress
TEXTUAL-CONVENTION
TruthValue

From Zhone

zhoneWtn

OBJECT-IDENTITY

From Zhone-TC

ZhoneRowStatus

OIDs

OID symbolic	OID numeric	Type	Access	Description
zhnLayer2Bridging	1.3.6.1.4.1.5504.2.5.42			This file defines the private Enterprise MIB extensions that define Layer 2 Bridging objects supported by the Zhone VoIP CPEs.
layer2BridgingObjects	1.3.6.1.4.1.5504.2.5.42.1
U32 maxBridgeEntries	1.3.6.1.4.1.5504.2.5.42.1.1	Unsigned32	read-only	The maximum number of entries available in the Bridge table.
U32 maxFilterEntries	1.3.6.1.4.1.5504.2.5.42.1.2	Unsigned32	read-only	The maximum number of entries available in the Filter table.
U32 maxMarkingEntries	1.3.6.1.4.1.5504.2.5.42.1.3	Unsigned32	read-only	The maximum number of entries available in the Marking table.
U32 bridgeNumberOfEntries	1.3.6.1.4.1.5504.2.5.42.1.4	Unsigned32	read-only	Number of entries in the Bridge table.
U32 filterNumberOfEntries	1.3.6.1.4.1.5504.2.5.42.1.5	Unsigned32	read-only	Number of entries in the Filter table.
U32 markingNumberOfEntries	1.3.6.1.4.1.5504.2.5.42.1.6	Unsigned32	read-only	Number of entries in the Marking table.
U32 availableInterfaceNumberOfEntries	1.3.6.1.4.1.5504.2.5.42.1.7	Unsigned32	read-only	Number of entries in the AvailableInterfaces table.
bridgeTable	1.3.6.1.4.1.5504.2.5.42.1.8		not-accessible	Bridge Table.
bridgeEntry	1.3.6.1.4.1.5504.2.5.42.1.8.1		not-accessible	Bridge Table.
U32 bridgeKey	1.3.6.1.4.1.5504.2.5.42.1.8.1.1	Unsigned32	read-only	Unique key for each Bridge table entry.
T/F bridgeEnable	1.3.6.1.4.1.5504.2.5.42.1.8.1.2	TruthValue	read-write	Enables or disables this Bridge table entry.
BRI bridgeStatus	1.3.6.1.4.1.5504.2.5.42.1.8.1.3	BridgeEntryStatusValues	read-only	The status of the bridge table entry. Enumeration of: Disabled Enabled Error
OCT bridgeName	1.3.6.1.4.1.5504.2.5.42.1.8.1.4	OCTET STRING	read-write	Human-readable name for this Bridge table entry.
U32 vlanID	1.3.6.1.4.1.5504.2.5.42.1.8.1.5	Unsigned32	read-write	The 802.1Q VLAN ID associated with this Bridge entry. A value of 0 indicates either Untagged or PriorityOnly tagging, which are treated identically.
VLA vlanType	1.3.6.1.4.1.5504.2.5.42.1.8.1.6	VlanTypeValues	read-write	The type of 802.1Q VLAN associated with this Bridge entry. Enumeration of: Unknown Bridged Routed TlsBridged PppoeRouted PppoeBridged BRouted PWEBridged CPU-Bridged
VLA secureVlan	1.3.6.1.4.1.5504.2.5.42.1.8.1.7	VlanSecureType	read-write	Secure setting for a VLAN associated with a bridge table entry. Enumeration of: disable enable unknown
ZHO bridgeTableRowStatus	1.3.6.1.4.1.5504.2.5.42.1.8.1.8	ZhoneRowStatus	read-write	The SNMP RowStatus of the current row. The following objects must be specified upon row creation: vlanID vlanType bridgeName
filterBridgeTable	1.3.6.1.4.1.5504.2.5.42.1.9		not-accessible	Filter table containing filter entries each of which is associated with one Bridge as specified by a Bridge table entry.
filterBridgeEntry	1.3.6.1.4.1.5504.2.5.42.1.9.1		not-accessible	Bridge Filter Table.
U32 filterKey	1.3.6.1.4.1.5504.2.5.42.1.9.1.1	Unsigned32	read-only	Unique key for each Bridge Filter table entry.
T/F filterEnable	1.3.6.1.4.1.5504.2.5.42.1.9.1.2	TruthValue	read-write	Enables or disables this Filter table entry.
BRI zhnFilterStatus	1.3.6.1.4.1.5504.2.5.42.1.9.1.3	BridgeEntryStatusValues	read-write	The status of this Filter table entry. Enumeration of: Disabled Enabled Error
U32 filterBridgeReference	1.3.6.1.4.1.5504.2.5.42.1.9.1.4	Unsigned32	read-only	The BridgeKey value of the Bridge table entry associated with this Filter.
OCT filterInterface	1.3.6.1.4.1.5504.2.5.42.1.9.1.5	OCTET STRING	read-write	The interface or interfaces associated with this Filter table entry. The bridge corresponding to this Filter table entry is defined to admit packets on ingress to the bridge from the specified interfaces that meet all of the criteria specified in the Filter table entry. The following values are defined. - To associate this Filter with a single interface listed in the AvailableInterface table, the Filter Interface value is set to the value of corresponding AvailableInterfaceKey. - AllInterfaces indicates that this Filter is associated with all LAN and WAN interfaces listed in the AvailableInterface table (all entries of InterfaceType LANInterface or WANInterface). - LANInterfaces indicates that this Filter is associated with all LAN interfaces listed in the AvailableInterface table (all entries of InterfaceType LANInterface). - WANInterfaces indicates that this Filter is associated with all WAN interfaces listed in the AvailableInterface table (all entries of InterfaceType WANInterface). - An empty string indicates the Filter table entry is not associated with any interface (and has no effect).
OCT sourceMACFromVendorClassIDFilter	1.3.6.1.4.1.5504.2.5.42.1.9.1.6	OCTET STRING	read-write	A string used to identify one or more devices via DHCP for which MAC address filtering would subsequently apply. A device is considered matching if it its DHCP Vendor Class Identifier (Option 60 as defined in RFC 2132) in the most recent DHCP lease acquisition or renewal was equal to the specified value.
T/F sourceMACFromVendorClassIDFilterExclude	1.3.6.1.4.1.5504.2.5.42.1.9.1.7	TruthValue	read-write	If false, on ingress to the interfaces associated with this Filter, the Bridge admits only those packets whose source MAC Address matches that of a LAN device previously identified as described in SourceMACFromVendorClassIDFilter. - If SourceMACFromVendorClassIDFilter is empty, no packets are admitted. - If SourceMACFromVendorClassIDFilter is true on ingress to the interfaces associated with this Filter, the Bridge admits all packets except those packets whose source MAC Address matches that of a LAN device previously identified as described in SourceMACFromVendorClassIDFilter. - If the SourceMACFromVendorClassIDFilter is empty, packets are admitted regardless of MAC address.
ZHO bridgeFilterRowStatus	1.3.6.1.4.1.5504.2.5.42.1.9.1.8	ZhoneRowStatus	read-write	The SNMP RowStatus of the current row. The following objects must be specified upon row creation: filterBridgeReference
markingTable	1.3.6.1.4.1.5504.2.5.42.1.10		not-accessible	Marking table identifies non-default layer-2 marking behavior for packets on egress from the specified interfaces.
markingEntry	1.3.6.1.4.1.5504.2.5.42.1.10.1		not-accessible	Marking table identifies non-default layer-2 marking behavior for packets on egress from the specified interfaces.
U32 markingKey	1.3.6.1.4.1.5504.2.5.42.1.10.1.1	Unsigned32	read-only	Unique key for each Bridge Marking table entry.
T/F markingEnable	1.3.6.1.4.1.5504.2.5.42.1.10.1.2	TruthValue	read-write	Enables or disables this Marking table entry.
BRI markingStatus	1.3.6.1.4.1.5504.2.5.42.1.10.1.3	BridgeEntryStatusValues	read-only	The status of this Marking table entry. Enumeration of: Disabled Enabled Error
U32 markingBridgeReference	1.3.6.1.4.1.5504.2.5.42.1.10.1.4	Unsigned32	read-only	The BridgeKey value of the Bridge table entry associated with this Marking. The effect of a Marking table entry applies only to packets that have been admitted to the specified bridge (regardless of the ingress interface).
OCT markingInterface	1.3.6.1.4.1.5504.2.5.42.1.10.1.5	OCTET STRING	read-write	The interface or interfaces associated with this Marking table entry. The bridge corresponding to this Marking table entry is defined to admit packets on ingress to the bridge from the specified interfaces that meet all of the criteria specified in the Marking table entry. The following values are defined. - To associate this Marking with a single interface listed in the AvailableInterface table, the Marking Interface value is set to the value of corresponding AvailableInterfaceKey. - AllInterfaces indicates that this Marking is associated with all LAN and WAN interfaces listed in the AvailableInterface table (all entries of InterfaceType LANInterface or WANInterface). - LANInterfaces indicates that this Marking is associated with all LAN interfaces listed in the AvailableInterface table (all entries of InterfaceType LANInterface). - WANInterfaces indicates that this Marking is associated with all WAN interfaces listed in the AvailableInterface table (all entries of InterfaceType WANInterface). - An empty string indicates the Marking table entry is not associated with any interface (and has no effect). If there is more than one enabled Marking table entry that specifies one or more of the same interfaces for the same bridge (i.e. identical values of MarkingBridgeReference), then for packets on egress from the specified bridge to those interfaces, the applied marking MUST be that specified in the Marking table entry among those in conflict with the lowest MarkingKey value. If an interface in a given bridge does not have a corresponding Marking table entry, the marking is left unchanged on egress.
T/F vlanIDUntag	1.3.6.1.4.1.5504.2.5.42.1.10.1.6	TruthValue	read-write	If true, on egress to the interfaces associated with this Marking table entry, all packets are Untagged. That is, the VLAN tag is stripped from the packet. If false, on egress to the interfaces associated with this Marking table entry, all VLAN tags are left intact (including those added on ingress).
INT vlanIDMark	1.3.6.1.4.1.5504.2.5.42.1.10.1.7	INTEGER	read-write	The 802.1Q VLAN ID to be used on egress to the interfaces associated with this Marking table entry (if VLANIDUntag is false). A value of -1 indicates that the default VLAN ID for the Bridge should be used instead (as specified by InternetGatewayDevice.Layer2Bridging.Bridge.{i}.vlanID for the Bridge table entry associated with this Marking table entry).
INT ethernetPriorityMark	1.3.6.1.4.1.5504.2.5.42.1.10.1.8	INTEGER	read-write	Ethernet priority code (as defined in 802.1D) to mark traffic with that falls into this Bridge on egress to the interfaces associated with this Marking table entry. A value of -1 indicates no change from the incoming packet or the mark assigned by the classifier.
T/F ethernetPriorityOverride	1.3.6.1.4.1.5504.2.5.42.1.10.1.9	TruthValue	read-write	If false, on egress to the interfaces associated with this Marking table entry, the EthernetPriorityMark, if specified, is applied only to packets of priority 0. If true, on egress to the interfaces associated with this Marking table entry, the EthernetPriorityMark, if specified, is to be applied to all packets on Bridge. If VLANIDUntag is true, then no priority marking is done since the tag containing the Ethernet priority is removed.
VLA vlanIDType	1.3.6.1.4.1.5504.2.5.42.1.10.1.10	VlanIDType	read-only	This parameter specifies the port VLAN membership type. The supported VLAN membership types are: Tagged - The frame leaving the device has one VLAN tag. Untagged - The frame leaving the device has no VLAN tag. S-TAG - The frame leaving the device has a service VLAN tag or a Service VLAN tag and a customer VLAN tag. TLS - The frame leaving the device may have a customer VLAN tag or no VLAN tag. OMCI - The frame leaves the device on the provised the GEM Port.
ZHO bridgeMarkingRowStatus	1.3.6.1.4.1.5504.2.5.42.1.10.1.11	ZhoneRowStatus	read-write	The SNMP RowStatus of the current row.
availableInterfaceTable	1.3.6.1.4.1.5504.2.5.42.1.11		not-accessible	Table containing all LAN and WAN interfaces that are available to be referenced by the Bridge table. Only interfaces that can carry layer-2 bridged traffic are included.
availableInterfaceEntry	1.3.6.1.4.1.5504.2.5.42.1.11.1		not-accessible	Table containing all LAN and WAN interfaces that are available to be referenced by the Bridge table. Only interfaces that can carry layer-2 bridged traffic are included.
U32 availableInterfaceKey	1.3.6.1.4.1.5504.2.5.42.1.11.1.1	Unsigned32	read-only	Unique key for each interface entry.
NUM interfaceType	1.3.6.1.4.1.5504.2.5.42.1.11.1.2	BridgingIntfTypeValues	read-only	Indicates whether the interface is a LAN-side or WAN-side interface, or a LAN-side or WAN-side connection to the Gateway.
OCT interfaceReference	1.3.6.1.4.1.5504.2.5.42.1.11.1.3	OCTET STRING	read-only	This table should contain a single entry for each available LAN and WAN interface. For a WAN interface, this parameter is the full hierarchical parameter name of a particular WANConnectionDevice. A WANConnectionDevice is considered available (included in this table) only if it supports layer-2 bridged traffic. That is, this table MUST include only WANConnectionDevices that contain either a WANEthernetLinkConfig object, or that contain a WANDSLLinkConfig object for which the LinkType is EoA (Ethernet over ATM). For example: InternetGatewayDevice.WANDevice.1.WANConnectionDevice.2 For a LAN interface, this parameter is the full hierarchical parameter name of a particular LAN InterfaceConfig object, or a WLANConfiguration object. This table SHOULD include one entry for each such object. For example: InternetGatewayDevice.LANDevice.1.LANEthernetInterfaceConfig.2 For a WAN-side connection to the Gateway's IP router, this parameter is the full hierarchical parameter name of a particular WANConnection service. This table SHOULD include an entry for each layer-3 WAN connection. For example: InternetGatewayDevice.WANDevice.1.WANConnectionDevice.2.WANPPPConnection.1 For a LAN-side connection to the Gateway's IP router, this parameter is the full hierarchical parameter name of a particular LANDevice. This table SHOULD include an entry for each LANDevice, each of which is associated with a LAN-side layer-3 connection to the Gateway's IP router. For example: InternetGatewayDevice.LANDevice.2
ZHO availableInterfaceRowStatus	1.3.6.1.4.1.5504.2.5.42.1.11.1.4	ZhoneRowStatus	read-write	The SNMP RowStatus of the current row.
vlanPortMembershipTable	1.3.6.1.4.1.5504.2.5.42.1.12		not-accessible	Layer 2 VLAN Port Membership Table.
vlanPortMembershipEntry	1.3.6.1.4.1.5504.2.5.42.1.12.1		not-accessible	Layer 2 VLAN Port Membership Table.
OCT vlanPort	1.3.6.1.4.1.5504.2.5.42.1.12.1.1	OCTET STRING	read-only	Bridge interface(port) name.
U32 vlanPortVlanID	1.3.6.1.4.1.5504.2.5.42.1.12.1.2	Unsigned32	read-write	The 802.1Q VLAN ID associated with this Bridge entry.
VLA vlanPortMembershipType	1.3.6.1.4.1.5504.2.5.42.1.12.1.3	VlanIDType	read-write	This parameter specifies the port VLAN membership type. When creating a new Vlan Port Member Entry, the supported VLAN membership types are: Tagged - The frame leaving the device has one VLAN tag. Untagged - The frame leaving the device has no VLAN tag. S-TAG - The frame leaving the device has a service VLAN tag or a Service VLAN tag and a customer VLAN tag. TLS - The frame leaving the device may have a customer VLAN tag or no VLAN tag. OMCI - The frame leaving the device is on the provisioned GEM Port.
ZHO vlanPortMembershipAction	1.3.6.1.4.1.5504.2.5.42.1.12.1.4	ZhoneRowStatus	read-write	The SNMP RowStatus of the current row.
layer2BridgingGlobalObjects	1.3.6.1.4.1.5504.2.5.42.1.13
VLA vlanTLSMode	1.3.6.1.4.1.5504.2.5.42.1.13.1	VlanTLSMode	read-write	This object implements transparent LAN service (TLS) by using a S-Tag (Service Provider tag) to tunnel the customer traffic over a service provider network. The CPE can operate in normal or S-Tag mode. In normal mode, CPE device operates according to the IEEE 802.1Q or 802.1D specifications. In S-TAG mode, the CPE device operates as follows: 1) The CPE's TPID (tag protocol ID) must be provisioned. 2) A S-Tag frame consists of a VLAN ID and a TPID that matches the CPE's provisioned TPID. 3) When the CPE adds a S-TAG, the S-Tag's VLAN ID will be taken from the CPE's default PVID and the TPID will be taken from the CPE's provisioned TPID. 4) The CPE device supports a TLS-Bridge. The ports on this bridge can be either S-TAG or TLS members. S-Tag port - The input frames from the service provider port may or may not have a S-TAG. The CPE will compare the tagged frame's TPID against the provisioned S-TAG TPID. If there is a match, the CPE will bridge the frame based on the VLAN ID in the S-Tag. If there is not a match, the frame is forwarded to the CPU. TLS port - The CPE will add a S-Tag to all input frames from this port regardless of whether the frames have a 802.1Q tag or not. The CPE will bridge the frames based on the VLAN ID in the S-Tag. Only a VLAN-tagged or untagged frames are expected from the ingress of a TLS (customer) port.
VLA vlanServiceTagTPID	1.3.6.1.4.1.5504.2.5.42.1.13.2	VlanTLSServiceTags	read-write	This object specifies the TPID (Tag Protocol ID) of the S-Tag. It is only used when the device's VlanMode is set to S-Tag. The supported Service TPIDs are: none sTag8100 sTag88A8 sTag9100 sTag9200 sTag9300
T/F vlanRouteAcrossVlans	1.3.6.1.4.1.5504.2.5.42.1.13.3	TruthValue	read-write	This object defines the VLAN router operation. If this object is set to TRUE, the router will route between IP subnets across VLANs. Route table lookups will ignore the VLAN ID of the ingress and egress ports. If there is a match, the packet is routed out the interface specified in the Route Table, regardless of the VLAN with which it is a member. If set to FALSE, the router will only route between IP subnets that are on the same VLAN. Packets will be forwarded to the configured Default Route for the VLAN that they arrived on, unless there is a Route Table match within that same VLAN. Routing of packets across VLANs is prevented, providing traffic isolation.
VLA vlanQOSMethod	1.3.6.1.4.1.5504.2.5.42.1.13.4	VlanQOSMethods	read-write	This object defines the VLAN router operation. If this object is set to TRUE, the router will route between IP subnets across VLANs. If it is set to FALSE, the router will only route between IP subnets that are on the same VLAN.
zhnLayer2BridgeConformance	1.3.6.1.4.1.5504.2.5.42.2
zhnLayer2BridgeGroups	1.3.6.1.4.1.5504.2.5.42.2.1
zhnBridgeGroup	1.3.6.1.4.1.5504.2.5.42.2.1.1			A collection of Zhone Bridge table objects that describe the bridged interfaces of the device.
zhnBridgeTableGroup	1.3.6.1.4.1.5504.2.5.42.2.1.2			A collection of Zhone Bridge table objects that describe the bridged interfaces of the device.
zhnFilterGroup	1.3.6.1.4.1.5504.2.5.42.2.1.3			A collection of Zhone Bridge Filter table objects that describe the filtering for bridged interfaces of the device.
zhnBridgeMarkingTableGroup	1.3.6.1.4.1.5504.2.5.42.2.1.4			A collection of Zhone Bridge Marking table objects that describe the VLAN marking for bridged interfaces of the device.
zhnBridgeAvailableInterfaceGroup	1.3.6.1.4.1.5504.2.5.42.2.1.5			A collection of Zhone Bridge Available Interface table objects that identify the available bridged interfaces of the device.
zhnPortMembershipGroup	1.3.6.1.4.1.5504.2.5.42.2.1.6			A collection of Zhone VLAN Port Membership table objects that map bridge ports to VLANs.
zhnVlanGlobalGroup	1.3.6.1.4.1.5504.2.5.42.2.1.7			A collection of Zhone VLAN Global scalar objects.
zhnLayer2BridgeCompliances	1.3.6.1.4.1.5504.2.5.42.2.2
zhnLayer2BridgeCompliance	1.3.6.1.4.1.5504.2.5.42.2.2.1			The Compliance statement for SNMP entities which manage display the Zhone CPE Layer Bridging Information. The Layer 2 Bridging filterBridgeTable is not required to be supported. If it is supported, not all objects defined as read-write are required to be writable.

RFC description

Zhone vendor-private MIB for Layer 2 bridging and switching management; handles VLAN, spanning tree, and bridge configuration.

Start monitoring Zhone Technologies VoIP CPE devices (bridge-table capacity/port-membership/VLAN-filter 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 ZHNLAYER2BRIDGING

What Is ZHNLAYER2BRIDGING?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description