Extreme Networks ExtremeWare 7.7, Command Reference Manual

Page: 2310 / 2620

2310 ExtremeWare 7.7 Command Reference Guide
PoS Commands—BlackDiamond Switch Only
configure ppp quality ports
configure ppp quality [off | <required_percent> {<seconds>}]
ports <portlist>
Description
Configures the Link Quality Monitoring (LQM) protocol on the specified ports.
Syntax Description
Default
The default value of
seconds
is 30. By default, LQM is
off
.
Usage Guidelines
LQM periodically transmits counts of packets/octets that were transmitted, along with counts of
packets/octets that were successfully received. This information enables LQM to determine the
percentage of data that is being dropped due to poor link quality. If the drop percentage is greater than
(100 -
required_percent
), all network-layer protocols running over the link are brought down. You
may want to bring a poor-quality link down when an alternate network path exists, or when billing is
based on the amount of data transmitted. The
required_percent
parameter is an integer in the range
[1–99]. The
seconds
parameter is an integer in the range [1–300] that determines how often quality
reports are to be received from the peer LQM entity (that is, the reporting interval). Specifying the
seconds
parameter is optional. It can take up to seven reporting intervals for LCP to bring a link down.
If the link quality subsequently improves, LCP will automatically bring the link back up; this type of
service restoration will take a minimum of 7 reporting intervals.
Example
The following example enables the LQM protocol on port 1 of a PoS module in slot 3 and sets
required_percent
to 95. Because no value is specified for the optional
seconds
parameter, the
command uses the default of 30 seconds:
config ppp quality 95 ports 3:1
History
This command was first available in an ExtremeWare IP Technology Services Release based on
v6.1.5b20.
Platform Availability
This command is available on the BlackDiamond switch only.
off Disables link quality monitoring protocol.
required_percent Specifies required link drop percentage for link quality management (LQM).
seconds Specifies how often (in seconds) the quality reports are to be received from
the peer LQM entity.
portlist Specifies the port number(s).