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LinkStat Element Documentation

NAME

LinkStat -- Click element; Track broadcast loss rates.

SYNOPSIS

LinkStat([KEYWORDS])

Ports: 1 input, at most 1 output
Processing: push
Package: grid (core)

DESCRIPTION

Expects Link probe packets as input. Records the last WINDOW unique (not neccessarily sequential) sequence numbers of link probes from each host, and calculates loss rates over the last TAU milliseconds for each host. If the output is connected, sends probe packets every PERIOD milliseconds. The source Ethernet address ETH must be specified if the second output is connected. Keyword arguments are:

ETH
Ethernet address of this node; required if output is connected.
PERIOD
Unsigned integer. Millisecond period between sending link probes if second output is connected. Defaults to 1000 (1 second).
WINDOW
Unsigned integer. Number of most recent sequence numbers to remember for each host. Defaults to 100.
TAU
Unsigned integer. Millisecond period over which to calculate loss rate for each host. Defaults to 10,000 (10 seconds).
SIZE
Unsigned integer. Total number of bytes in probe packet, including ethernet header and above. Defaults to 1000.
USE_SECOND_PROTO
Boolean. If true, use the alternate LinkStat ethernet protocol number. The normal protocol number is 0x7ffe; the alternate number is 0x7ffd. Defaults to false.

Generated by 'click-elem2man' from '../elements/grid/linkstat.hh' on 7/Mar/2009.

COMMENTS

 
elements/linkstat.txt · Last modified: 2009/03/07 17:24 (external edit)
 
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