All MIBs › COM21-HCXSTU-MIB › hcxStuIpDhcpSnoopFiltEnbl
hcxStuIpDhcpSnoopFiltEnbl
Module: COM21-HCXSTU-MIB
OID (symbolic): COM21-HCXSTU-MIB::hcxStuIpDhcpSnoopFiltEnbl
OID (numeric): 1.3.6.1.4.1.1141.2.53.1.1.9
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-write
Description: Specifies whether DHCP snooping should be enabled for this ComPort. This filter is applicable to 100BT, and OC3 cards. It is not applicable to 10BT card. It snoops traffic in the downstream direction for DHCPACK packets, and in the upstream direction for DHCPDECLINE or DHCPRELEASE packets. Dynamic IP address assigments thus learned are stored in the valid source IP address table (com21HcxStuSrcIpAddrGroup.) Default is false. This filter can also be enabled for an entire VLAN via the MIB attribute hcxVlanIpDhcpSnoopFiltEnbl.
What is hcxStuIpDhcpSnoopFiltEnbl?
This read-write true/false object enables DHCP snooping for this ComPort, applicable to 100BT and OC3 but not 10BT, snooping DHCPACK in the downstream direction and DHCPDECLINE/DHCPRELEASE-type traffic upstream, defaulting to false, per the description. An admin enables this to track legitimate DHCP transactions for a subscriber's device as part of enforcing dynamic address assignment integrity. For example, an admin enables hcxStuIpDhcpSnoopFiltEnbl on a ComPort to correctly track dynamically assigned addresses feeding the hcxStuSrcIpAddrType dynamic classification.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.1141.2.53.1.1.9 snmpwalk -v2c -c public <target> COM21-HCXSTU-MIB::hcxStuIpDhcpSnoopFiltEnbl
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.1141.2.53.1.1.9.1 snmpget -v2c -c public <target> COM21-HCXSTU-MIB::hcxStuIpDhcpSnoopFiltEnbl.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.1141.2.53.1.1.9.1 i <value>
Start monitoring Com21 HCX subscriber terminal unit (cable modem CPE, legacy) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the COM21-HCXSTU-MIB::hcxStuIpDhcpSnoopFiltEnbl OID value, configure state conditions and alerts, and monitor any Com21 HCX subscriber terminal unit (cable modem CPE, legacy) from a single console.
OID Breakdown
Upper-level ancestors (8 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.1141 | com21 | COM21-HCX-MIB |
| 1.3.6.1.4.1.1141.2 | com21Hcx | COM21-HCX-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.1141.2.53 | com21HcxStuIpFiltGroup | COM21-HCXSTU-MIB |
| 1.3.6.1.4.1.1141.2.53.1 | com21HcxStuIpFiltTable | COM21-HCXSTU-MIB |
| 1.3.6.1.4.1.1141.2.53.1.1 | com21HcxStuIpFiltEntry | COM21-HCXSTU-MIB |
| 1.3.6.1.4.1.1141.2.53.1.1.9 | hcxStuIpDhcpSnoopFiltEnbl | COM21-HCXSTU-MIB |