All MIBs › CISCOSB-rlBrgMulticast-MIB › rlIgmpMldSnoopVlanRouterForbiddenPortlist
rlIgmpMldSnoopVlanRouterForbiddenPortlist
Module: CISCOSB-rlBrgMulticast-MIB
OID (symbolic): CISCOSB-rlBrgMulticast-MIB::rlIgmpMldSnoopVlanRouterForbiddenPortlist
OID (numeric): 1.3.6.1.4.1.9.6.1.101.55.5.5.1.12
Node type: OBJECT-TYPE
Type: PortList
Access: read-write
Description: List of ports statically configured to NOT be router ports on this VLAN
What is rlIgmpMldSnoopVlanRouterForbiddenPortlist?
This read-write bitmask explicitly marks ports on this VLAN that must never be treated as multicast-router ports, overriding any dynamic detection that might otherwise flag them. An administrator uses this to prevent a misbehaving or spoofed device on a particular port from being mistaken for an upstream multicast router. For example, adding a suspicious access port to rlIgmpMldSnoopVlanRouterForbiddenPortlist stops the switch from ever treating traffic from that port as legitimate router signaling.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.9.6.1.101.55.5.5.1.12 snmpwalk -v2c -c public <target> CISCOSB-rlBrgMulticast-MIB::rlIgmpMldSnoopVlanRouterForbiddenPortlist
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.9.6.1.101.55.5.5.1.12.1 snmpget -v2c -c public <target> CISCOSB-rlBrgMulticast-MIB::rlIgmpMldSnoopVlanRouterForbiddenPortlist.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.9.6.1.101.55.5.5.1.12.1 s <value>
Start monitoring Cisco Small Business (SB/SG series) switch with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the CISCOSB-rlBrgMulticast-MIB::rlIgmpMldSnoopVlanRouterForbiddenPortlist OID value, configure state conditions and alerts, and monitor any Cisco Small Business (SB/SG series) switch from a single console.
OID Breakdown
Upper-level ancestors (11 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 |
| 1.3.6.1.4.1.9 | cisco | CAT2600-MIB |
| 1.3.6.1.4.1.9.6 | otherEnterprises | CISCO-SMI |
| 1.3.6.1.4.1.9.6.1 | ciscoSB | CISCO-SMI |
| 1.3.6.1.4.1.9.6.1.101 | switch001 | CISCOSB-MIB |
| 1.3.6.1.4.1.9.6.1.101.55 | rlMacMulticast | CISCOSB-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.9.6.1.101.55.5 | rlMldSnoop | CISCOSB-rlBrgMulticast-MIB |
| 1.3.6.1.4.1.9.6.1.101.55.5.5 | rlIgmpMldSnoopVlanTable | CISCOSB-rlBrgMulticast-MIB |
| 1.3.6.1.4.1.9.6.1.101.55.5.5.1 | rlIgmpMldSnoopVlanEntry | CISCOSB-rlBrgMulticast-MIB |
| 1.3.6.1.4.1.9.6.1.101.55.5.5.1.12 | rlIgmpMldSnoopVlanRouterForbiddenPortlist | CISCOSB-rlBrgMulticast-MIB |