All MIBs › CISCOSB-IPV6FHS-MIB › rlFirstHopSecCountersDropRaGuardUnauthorizedRouterPreference
rlFirstHopSecCountersDropRaGuardUnauthorizedRouterPreference
Module: CISCOSB-IPV6FHS-MIB
OID (symbolic): CISCOSB-IPV6FHS-MIB::rlFirstHopSecCountersDropRaGuardUnauthorizedRouterPreference
OID (numeric): 1.3.6.1.4.1.9.6.1.101.215.1.8.1.26
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: Number of dropped RA messages due to unauthorized router preference.
What is rlFirstHopSecCountersDropRaGuardUnauthorizedRouterPreference?
This read-only Counter32 tallies the number of RA messages dropped for unauthorized router preference on the interface since the counter was last reset. An admin cares because RAs failing the RA Guard router-preference range check, so watching this counter helps spot attacks, misconfigured neighboring devices, or an overly strict policy. For example, if this counter on port Gi1/0/3 climbs rapidly right after a new device joins the LAN, it is a strong clue that device is the source of the offending IPv6 traffic on that link.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.9.6.1.101.215.1.8.1.26 snmpwalk -v2c -c public <target> CISCOSB-IPV6FHS-MIB::rlFirstHopSecCountersDropRaGuardUnauthorizedRouterPreference
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.9.6.1.101.215.1.8.1.26.1 snmpget -v2c -c public <target> CISCOSB-IPV6FHS-MIB::rlFirstHopSecCountersDropRaGuardUnauthorizedRouterPreference.1
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OID Breakdown
Upper-level ancestors (10 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 |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.9.6.1.101.215 | rlIpv6Fhs | CISCOSB-IPV6FHS-MIB |
| 1.3.6.1.4.1.9.6.1.101.215.1 | rlFirstHopSec | CISCOSB-IPV6FHS-MIB |
| 1.3.6.1.4.1.9.6.1.101.215.1.8 | rlFirstHopSecCountersTable | CISCOSB-IPV6FHS-MIB |
| 1.3.6.1.4.1.9.6.1.101.215.1.8.1 | rlFirstHopSecCountersEntry | CISCOSB-IPV6FHS-MIB |
| 1.3.6.1.4.1.9.6.1.101.215.1.8.1.26 | rlFirstHopSecCountersDropRaGuardUnauthorizedRouterPreference | CISCOSB-IPV6FHS-MIB |