All MIBs › CTRON-SSR-L2-MIB › l2LearnedEntryDiscards
l2LearnedEntryDiscards
Module: CTRON-SSR-L2-MIB
OID (symbolic): CTRON-SSR-L2-MIB::l2LearnedEntryDiscards
OID (numeric): 1.3.6.1.4.1.52.2501.1.2.1
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: The total number of Forwarding Database entries, which have been or would have been learned, but have been discarded due to a lack of space to store them in the Forwarding Database. If this counter is increasing, it indicates that the Forwarding Database is regularly becoming full (a condition which has unpleasant performance effects on the subnetwork). If this counter has a significant value but is not presently increasing, it indicates that the problem has been occurring but is not persistent.
What is l2LearnedEntryDiscards?
This counts Forwarding Database entries that have been, or would have been, learned but were discarded because there was no room to store them, corresponding to RFC 1493's dot1dTpLearnedEntryDiscards. On this Cabletron SSR switch, an admin treats a steadily increasing value as a sign the L2 forwarding table is regularly filling up, hurting subnet performance, while a static non-zero value means the problem happened once but isn't ongoing.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.52.2501.1.2.1 snmpwalk -v2c -c public <target> CTRON-SSR-L2-MIB::l2LearnedEntryDiscards
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.52.2501.1.2.1.1 snmpget -v2c -c public <target> CTRON-SSR-L2-MIB::l2LearnedEntryDiscards.1
Start monitoring Cabletron/Enterasys Smart Switch Router (SSR) — legacy/deprecated (Layer 2) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the CTRON-SSR-L2-MIB::l2LearnedEntryDiscards OID value, configure state conditions and alerts, and monitor any Cabletron/Enterasys Smart Switch Router (SSR) — legacy/deprecated (Layer 2) from a single console.
OID Breakdown
Upper-level ancestors (9 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 |
| 1.3.6.1.4.1.52 | cabletron | Cabletron-MIB |
| 1.3.6.1.4.1.52.2501 | ssr | CTRON-SSR-SMI-MIB |
| 1.3.6.1.4.1.52.2501.1 | ssrMibs | CTRON-SSR-SMI-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.52.2501.1.2 | l2Group | CTRON-SSR-L2-MIB |
| 1.3.6.1.4.1.52.2501.1.2.1 | l2LearnedEntryDiscards | CTRON-SSR-L2-MIB |