All MIBs › GBNL2DhcpSnooping-MIB
Organization: Greentech
Last Updated: 2001-05-03
Category: Protocol: DHCP, Vendor: Greentech
Description: Greentech MIB for DHCP snooping configuration and binding table management on Layer 2 switches.
Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock 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.
What Is GBNL2DhcpSnooping-MIB?
GBNL2DhcpSnooping-MIB is a Greentech (GBN) enterprise MIB for configuring and monitoring DHCP snooping on Layer 2 switches, a security feature that filters untrusted DHCP traffic and builds a binding table of legitimate client IP-to-MAC-to-port associations. It exposes configuration objects for enabling snooping per VLAN/port and a binding table recording learned DHCP lease associations. Its monitoring value is largely security/software-state oriented: an admin can check whether snooping is enabled on the expected ports/VLANs and inspect the binding table to detect rogue DHCP clients or unexpected bindings, rather than exposing hardware health data. It is a vendor-specific extension of the widely-implemented DHCP snooping feature also modeled in other vendors' proprietary MIBs. It is deployed on Greentech-branded Layer 2 access switches in networks needing protection against rogue DHCP servers and IP spoofing, typically after an administrator performs a GBNL2DhcpSnooping-MIB download from Greentech to compile it into their monitoring platform.
IPNetwork Monitor allows you to monitor SNMP objects defined in GBNL2DhcpSnooping-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
- Greentech Layer 2 access switch
Monitoring Examples
No sample_objects are provided for this MIB, so specific object names cannot be cited; based on its short description one would expect a binding table keyed by port/VLAN and MAC address, containing the leased IP and lease expiry time. An admin would typically poll such a table to confirm which hosts have valid DHCP-snooped bindings and flag any port receiving DHCP server traffic that isn't a designated trusted uplink. This is a general characterization rather than a confirmed object-level example.
What Can Be Monitored
- DHCP snooping enable status per port/VLAN
- DHCP binding table (IP/MAC/port)
- trusted vs untrusted port configuration
Imported Objects
From GREENTECH-MASTER-MIB
| gbnL2 | OBJECT-IDENTITY |
From SNMPv2-CONF
| MODULE-COMPLIANCE | |
| OBJECT-GROUP |
From SNMPv2-SMI
| Counter32 | |
| Integer32 | |
| IpAddress | |
| MODULE-IDENTITY | |
| OBJECT-TYPE | |
| TimeTicks |
From SNMPv2-TC
| DisplayString | |
| RowStatus | |
| TruthValue |
OIDs
RFC description
Manages DHCP snooping functionality on Greentech layer 2 switches for security and IP source guard.
Start monitoring Greentech (GBN) managed switch (DHCP snooping) 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.