All MIBs › ME1200-IP-MIB › me1200IpStatisticsGlobalsIpv4OutFragFails
me1200IpStatisticsGlobalsIpv4OutFragFails
Module: ME1200-IP-MIB
OID (symbolic): ME1200-IP-MIB::me1200IpStatisticsGlobalsIpv4OutFragFails
OID (numeric): 1.3.6.1.4.1.9.9.815.1.102.1.4.1.1.26
Node type: OBJECT-TYPE
Type: Unsigned32
Access: read-only
Description: The number of IP datagrams that have been discarded because they needed to be fragmented but could not be. This includes IPv4 packets that have the DF bit set and IPv6 packets that are being forwarded and exceed the outgoing link MTU.
When tracking interface statistics, the counter of the outgoing interface is incremented for an unsuccessfully fragmented datagram.
Discontinuities in the value of this counter can occur at re-initialization of the system, and at other times as indicated by the value of DiscontinuityTime.
What is me1200IpStatisticsGlobalsIpv4OutFragFails?
This counter counts datagrams that needed fragmenting but couldn't be, for example because the datagram had the don't-fragment bit set, or an IPv6 packet being forwarded exceeded the outgoing link's MTU, tallied system-wide across every IP interface on the switch for IPv4 traffic. A rising value while everything else looks healthy is usually the first sign of a misconfiguration or an attack, so admins graph it alongside the throughput counters rather than reading it alone.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.9.9.815.1.102.1.4.1.1.26 snmpwalk -v2c -c public <target> ME1200-IP-MIB::me1200IpStatisticsGlobalsIpv4OutFragFails
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.9.9.815.1.102.1.4.1.1.26.1 snmpget -v2c -c public <target> ME1200-IP-MIB::me1200IpStatisticsGlobalsIpv4OutFragFails.1
SNMPv3 example:
snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> me1200IpStatisticsGlobalsIpv4OutFragFails.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 |
| 1.3.6.1.4.1.9.9 | ciscoMgmt | CISCO-SMI |
| 1.3.6.1.4.1.9.9.815 | ciscoME1200MIB | CISCOME1200-MIB |
| 1.3.6.1.4.1.9.9.815.1 | me1200SwitchMgmt | CISCOME1200-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.9.9.815.1.102 | me1200IpMIB | ME1200-IP-MIB |
| 1.3.6.1.4.1.9.9.815.1.102.1 | me1200IpMIBObjects | ME1200-IP-MIB |
| 1.3.6.1.4.1.9.9.815.1.102.1.4 | me1200IpStatistics | ME1200-IP-MIB |
| 1.3.6.1.4.1.9.9.815.1.102.1.4.1 | me1200IpStatisticsGlobals | ME1200-IP-MIB |
| 1.3.6.1.4.1.9.9.815.1.102.1.4.1.1 | me1200IpStatisticsGlobalsIpv4 | ME1200-IP-MIB |
| 1.3.6.1.4.1.9.9.815.1.102.1.4.1.1.26 | me1200IpStatisticsGlobalsIpv4OutFragFails | ME1200-IP-MIB |