All MIBs › TCP-ESTATS-MIB › tcpEStatsStackWillUseSACK
tcpEStatsStackWillUseSACK
Module: TCP-ESTATS-MIB
OID (symbolic): TCP-ESTATS-MIB::tcpEStatsStackWillUseSACK
OID (numeric): 1.3.6.1.2.1.156.1.1.5.1.9
Node type: OBJECT-TYPE
Type: TcpEStatsNegotiated
Access: read-only
Description: Enabled(1) if the local host will process SACK options, selfDisabled(2) if SACK is disabled or not implemented on the local host, or peerDisabled(3) if the remote host sends
duplicate ACKs without SACK options, or the local host otherwise decides not to process received SACK options.
Unlike other TCP options, the remote data receiver cannot explicitly indicate if it is able to generate SACK options. When sending data, the local host has to deduce if the remote receiver is sending SACK options. This object can transition from Enabled(1) to peerDisabled(3) after the SYN exchange.
Note that SACK negotiation is not symmetrical. SACK can enabled on one side of the connection and not the other.
What is tcpEStatsStackWillUseSACK?
Whether this host will process SACK options received on this connection - enabled(1), selfDisabled(2), or peerDisabled(3) if the local host decides the remote side isn't actually sending them; can transition from enabled to peerDisabled mid-connection since the receiver's SACK capability can't be explicitly signaled.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.156.1.1.5.1.9 snmpwalk -v2c -c public <target> TCP-ESTATS-MIB::tcpEStatsStackWillUseSACK
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.156.1.1.5.1.9.1 snmpget -v2c -c public <target> TCP-ESTATS-MIB::tcpEStatsStackWillUseSACK.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 | APERTUS-NPG-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.156 | tcpEStatsMIB | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1 | tcpEStatsMIBObjects | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1.1 | tcpEStats | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1.1.5 | tcpEStatsStackTable | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1.1.5.1 | tcpEStatsStackEntry | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1.1.5.1.9 | tcpEStatsStackWillUseSACK | TCP-ESTATS-MIB |