All MIBs › CISCO-UNIFIED-FIREWALL-MIB › cufwL2GlobalArpOverflowRate5
cufwL2GlobalArpOverflowRate5
Module: CISCO-UNIFIED-FIREWALL-MIB
OID (symbolic): CISCO-UNIFIED-FIREWALL-MIB::cufwL2GlobalArpOverflowRate5
OID (numeric): 1.3.6.1.4.1.9.9.491.1.6.1.9
Node type: OBJECT-TYPE
Type: Gauge32
Access: read-only
Description: The number of times an existing entry from the ARP cache had to be ejected in order to insert a new entry in the last 300 seconds.
This counter is accumulated since the last reboot of the firewall.
What is cufwL2GlobalArpOverflowRate5?
This Gauge32 counts how many times an existing ARP cache entry had to be evicted to make room for a new one over the last 300 seconds, with the underlying counter accumulated since the last reboot. An admin uses it to detect ARP cache pressure on the transparent firewall, where the configured cache size in cufwL2GlobalArpCacheSize may be too small for the number of active hosts. A consistently nonzero value here would suggest the ARP cache is being churned faster than ideal, risking stale or repeatedly re-resolved entries.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.9.9.491.1.6.1.9 snmpwalk -v2c -c public <target> CISCO-UNIFIED-FIREWALL-MIB::cufwL2GlobalArpOverflowRate5
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.9.9.491.1.6.1.9.1 snmpget -v2c -c public <target> CISCO-UNIFIED-FIREWALL-MIB::cufwL2GlobalArpOverflowRate5.1
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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 |
| 1.3.6.1.4.1.9 | cisco | CAT2600-MIB |
| 1.3.6.1.4.1.9.9 | ciscoMgmt | CISCO-SMI |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.9.9.491 | ciscoUnifiedFirewallMIB | CISCO-UNIFIED-FIREWALL-MIB |
| 1.3.6.1.4.1.9.9.491.1 | ciscoUnifiedFirewallMIBObjects | CISCO-UNIFIED-FIREWALL-MIB |
| 1.3.6.1.4.1.9.9.491.1.6 | cuFwL2FwGrp | CISCO-UNIFIED-FIREWALL-MIB |
| 1.3.6.1.4.1.9.9.491.1.6.1 | cufwL2FwGlobals | CISCO-UNIFIED-FIREWALL-MIB |
| 1.3.6.1.4.1.9.9.491.1.6.1.9 | cufwL2GlobalArpOverflowRate5 | CISCO-UNIFIED-FIREWALL-MIB |