User's Manual

SPEEDLAN Installation and Operation User Guide
SNMP Monitoring 11-21
• Rto Maximum
The maximum 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, an object of this type has the semantics of the LBOUND quality described
in RFC 793.
• Maximum connections
The limit on the total number of TCP connections the entity can support. In entities where
the maximum number of connections is dynamic, this object should contain the value -1.
• Active opens
The number of times TCP connections have made a direct transition to the SYN-SENT state
from the CLOSED state.
• Passive opens
The number of times TCP connections have made a direct transition to SYN-SENT state
from the LISTEN state.
• Attempts failed
The number of times TCP connections have made a direct transition to the CLOSED state
from either the SYN-SENT state or the SYN-RCVD state, plus the number of times TCP
connections have made a direct transition to the LISTEN state from the SYN-RCVD state.
• Establish resets
The number of times TCP connections have made a direct transition to the closed state from
either the ESTABLISHED state or the CLOSE-WAIT state.
• Current establishes
The number of TCP connections for which the current state is either ESTABLISHED or
CLOSE-WAIT.
• Segments received
The total number of segments received, including those received in error. This count
includes segments received on currently established connections.
• Segments sent
The total number of segments sent, including those on current connections but excluding
those containing only retransmission octets.
• Segments retransmitted
The total number of segments retransmitted -- that is, the number of TCP segments
transmitted containing one or more previously transmitted octets.
• Segments in error
The total number of segments received in error (i.e., with bad TCP checksums).
• Segment sent with RST
The number of TCP segments sent containing the RST flag.