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ExtremeWare Software 7.3.0 Command Reference Guide
PoS Commands
configure red
configure red [drop-probability | low-drop-probability |
high-drop-probability] <percent> {ports
<portlist>}
Description
Configures the RED drop probability for a specified port.
Syntax Description
Default
For PoS ports, both the low and high drop-probabilities default to 10%.
Usage Guidelines
The optional
low-drop-probability
,
high-drop-probability
, and
ports
keywords have been added
to support the PoS module. Currently, these new keywords are only supported for SONET ports.
Omission of the
ports
keyword indicates that the setting is to be applied to all ports.
The drop probability is specified as a percentage, where the
percent
parameter is an integer in the
range [1..100]. The implementation provides weighted RED (WRED) functionality via support for two
different drop probabilities: a
low-drop-probability
and a
high-drop-probability
. The DSCPs of IP
packets indicate whether the packet should be dropped with low probability or high probability, and
the appropriate percentage is then applied if WRED is active. WRED is only applied to IP packets, and
the
configure diffserv examination code-point
command supports complete flexibility in
assigning DSCPs to the two different drop-probability levels. The configured mapping of DSCPs to
drop-probability levels is used by WRED even if
diffserv examination
is disabled on the port.
The
drop-probability
keyword indicates that the specified percentage should be used for both the
low and high drop-probabilities, which effectively disables WRED and reverts to standard RED
operation. RED is active when the average queue length is between the minimum and maximum
thresholds. In this region, the probability that a given packet is dropped increases linearly up to the
configured drop probability at the maximum threshold. All packets are dropped when the average
queue length exceeds the maximum threshold.
Example
The following command configure a RED high drop-probability of 20% on the SONET ports:
config red high-drop-probability 20 ports 2:1-2:2
drop-probability
Specifies both the high and low drop probability rates.
low-drop-probability
Sets the low drop probability rate.
high-drop-probability
Sets the high drop probability rate.
percent
Specifies the percentage for the drop probability.
portlist
Specifies the port number(s).
Summary of Contents for ExtremeWare 7.3.0
Page 54: ...54 ExtremeWare Software 7 3 0 Command Reference Guide Contents...
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Page 378: ...378 ExtremeWare Software 7 3 0 Command Reference Guide FDB Commands...
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Page 436: ...436 ExtremeWare Software 7 3 0 Command Reference Guide NAT Commands...
Page 600: ...600 ExtremeWare Software 7 3 0 Command Reference Guide SLB Commands...
Page 968: ...968 ExtremeWare Software 7 3 0 Command Reference Guide Security Commands...
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Page 1126: ...1126 ExtremeWare Software 7 3 0 Command Reference Guide ESRP Commands...
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Page 1478: ...1478 ExtremeWare Software 7 3 0 Command Reference Guide BGP Commands...
Page 1556: ...1556 ExtremeWare Software 7 3 0 Command Reference Guide IP Multicast Commands...
Page 1600: ...1600 ExtremeWare Software 7 3 0 Command Reference Guide IPX Commands...
Page 1616: ...1616 ExtremeWare Software 7 3 0 Command Reference Guide ARM Commands...
Page 1694: ...1694 ExtremeWare Software 7 3 0 Command Reference Guide PoS Commands...
Page 1750: ...1750 ExtremeWare Software 7 3 0 Command Reference Guide T1 E1 and T3 WAN Commands...
Page 1856: ...1856 ExtremeWare Software 7 3 0 Command Reference Guide MPLS Commands...
Page 1898: ...1898 ExtremeWare Software 7 3 0 Command Reference Guide High Density Gigabit Ethernet Commands...
Page 1938: ...1938 ExtremeWare Software 7 3 0 Command Reference Guide Power Over Ethernet Commands...
Page 1988: ...1988 ExtremeWare Software 7 3 0 Command Reference Guide H VPLS Commands...
Page 2106: ...2106 ExtremeWare Software 7 3 0 Command Reference Guide Wireless Commands...
Page 2132: ...2132 ExtremeWare Software 7 3 0 Command Reference Guide Configuration and Image Commands...
Page 2236: ...2236 ExtremeWare Software 7 3 0 Command Reference Guide Troubleshooting Commands...
Page 2254: ...2254 ExtremeWare Software 7 3 0 Command Reference Guide Index of Commands...