User's Manual

SPEEDLAN Installation and Operation User Guide
11-20 SNMP Monitoring
IP/TCP/UDP Monitor
The brouter keeps the standard TCP/UDP statistics on IP protocols as indicated below.
TCP
• Rto Algorithm
The algorithm used to determine the timeout value used for retransmitting unacknowledged
octets, which can be: "other" - none of the following; "constant" - a constant rto; "rsre" - MIL-
STD-1778, Appendix B; "vanj" - Van Jacobson's algorithm.
• Rto Minimum
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", an object of this type has the semantics of the LBOUND quality
described in RFC 793.