Extreme Networks ExtremeWare XOS 11.1, Руководство пользователя

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Ethernet Automatic Protection Switching
ExtremeWare XOS 11.1 Concepts Guide
276
Configuring EAPS Polling Timers
To set the values of the polling timers the master node uses for the EAPS health check packet that is
circulated around the ring for an EAPS domain, use the following commands:
configure eaps <name> hellotime <seconds>
configure eaps <name> failtime <seconds>
NOTE
These commands apply only to the master node. If you configure the polling timers for a transit node, they will be
ignored. If you later reconfigure that transit node as the master node, the polling timer values will be used as the
current values.
Use the
hellotime
keyword and its associated
seconds
parameter to specify the amount of time the
master node waits between transmissions of health check packets on the control VLAN. The value for
seconds
must be greater than 0 when you are configuring a master node. The default value is 1 second.
NOTE
Increasing the
hellotime
value keeps the processor from sending and processing too many health check packets.
Use the
failtime
keyword and
seconds
parameters to specify the amount of time the master node
waits before the failtimer expires.
The
seconds
parameter must be greater than the configured value for
hellotime
. The default value is 3
seconds.
To configure the action taken if there is a break in the ring, use the following command:
configure eaps <name> failtime expiry-action [open-secondary-port | send-alert]
You can configure the action taken when the failtimer expires by using the
configure eaps failtime
expiry-action
command. Use the
send-alert
parameter to send an alert when the failtimer expires.
Instead of going into a “failed” state, the master node remains in a “Complete” or “Init” state, maintains
the secondary port blocking, and writes a critical error message to syslog warning the user that there is
a fault in the ring. An SNMP trap is also sent.
Use the
open-secondary-port
parameter to open the secondary port when the failtimer expires.
NOTE
Increasing the failtime value provides more protection by waiting longer to receive a health check packet when the
network is congested.
The following command examples configure the hellotime value for the EAPS domain “eaps_1” to
2 seconds, the failtimer value to 15 seconds, and the failtimer expiry-action to open the secondary port
if the failtimer expires:
configure eaps eaps_1 hellotime 2
configure eaps eaps_1 failtime 15
configure eaps eaps_1 failtimer expiry-action open-secondary-port