All MIBs › CHECKPOINT-MIB-2 › tcpRtoMin
tcpRtoMin
Module: CHECKPOINT-MIB-2
OID (symbolic): CHECKPOINT-MIB-2::tcpRtoMin
OID (numeric): 1.3.6.1.2.1.6.2
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-only
Description: The minimum value permitted by a TCP implementation for the retransmission timeout, measured in milliseconds. More refined semantics for objects of this type depend upon the algorithm used to determine the retransmission timeout. In particular, when the timeout algorithm is rsre(3), an object of this type has the semantics of the LBOUND quantity described in RFC 793.
What is tcpRtoMin?
The minimum retransmission timeout, in milliseconds, this device's TCP stack will use, with the DESCRIPTION noting the exact semantics depend on the retransmission algorithm in use. This floor matters because it caps how aggressively the gateway's own TCP stack, for management sessions and log forwarding terminating on the box, will retransmit on a lossy link; set too high, brief packet loss on the management network causes visibly slow session recovery. Example: tcpRtoMin reporting 200ms explains why a management SSH session over a slightly lossy WAN link to this gateway feels sluggish to reconnect after even a single dropped ACK.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.6.2 snmpwalk -v2c -c public <target> CHECKPOINT-MIB-2::tcpRtoMin
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.6.2.1 snmpget -v2c -c public <target> CHECKPOINT-MIB-2::tcpRtoMin.1
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OID Breakdown
Upper-level ancestors (6 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 |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.6 | tcp | CHECKPOINT-MIB-2 |
| 1.3.6.1.2.1.6.2 | tcpRtoMin | CHECKPOINT-MIB-2 |