All MIBs › TCP-MIB › tcpHCOutSegs
tcpHCOutSegs
Module: TCP-MIB
OID (symbolic): TCP-MIB::tcpHCOutSegs
OID (numeric): 1.3.6.1.2.1.6.18
Node type: OBJECT-TYPE
Type: Counter64
Access: read-only
Description: The total number of segments sent, including those on current connections but excluding those containing only retransmitted octets. This object is the 64-bit equivalent of tcpOutSegs.
Discontinuities in the value of this counter are indicated via discontinuities in the value of sysUpTime.
What is tcpHCOutSegs?
This is a 64-bit running counter of all TCP segments a device has sent, excluding pure retransmissions, serving as the high-capacity equivalent of the older 32-bit tcpOutSegs counter so it doesn't wrap on very busy high-speed links. A network administrator graphs this over time to gauge outbound TCP traffic volume on a host or router, watching for discontinuities (which per the source align with sysUpTime resets, indicating a reboot or counter reset). For example, a steadily climbing tcpHCOutSegs value on a busy file server confirms it is actively transmitting large amounts of TCP data.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.6.18 snmpwalk -v2c -c public <target> TCP-MIB::tcpHCOutSegs
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.6.18.1 snmpget -v2c -c public <target> TCP-MIB::tcpHCOutSegs.1
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OID Breakdown
Upper-level ancestors (7 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 |
| 1.3.6.1.2 | mgmt | AXON-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| 1.3.6.1.2.1.6 | tcp | CHECKPOINT-MIB-2 |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.6.18 | tcpHCOutSegs | TCP-MIB |