Extreme Networks ExtremeWare 7.2e, Инструкция по установке и эксплуатации

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188 ExtremeWare 7.2e Installation and User Guide
Ethernet Automatic Protection Switching
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.
To use the failtimer expiry action of earlier releases, use the
open-secondary-port
parameter.
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 failtime value to 15 seconds, and the failtime 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
Configuring the Primary and Secondary Ports
Each node on the ring connects to the ring through two ring ports. As part of the protection switching
scheme, one port must be configured as the primary port; the other must be configured as the secondary
port.
If the ring is complete, the master node prevents a loop by logically blocking all data traffic in the
transmit and receive directions on its secondary port. If the master node subsequently detects a break in
the ring, it unblocks its secondary port and allows data traffic to be transmitted and received through it.
To configure a node port as primary or secondary, use the following command:
configure eaps <name> [primary | secondary] port <port number>
The following command example adds port 1 of the Summit 400-48 switch to the EAPS domain
“eaps_1” as the primary port.
configure eaps eaps_1 primary port 1
Configuring the EAPS Control VLAN
You must configure one control VLAN for each EAPS domain. The control VLAN is used only to send
and receive EAPS messages.
NOTE
If the domain is active, you cannot delete the domain or modify the configuration of the control VLAN.
To configure the EAPS control VLAN for the domain, use the following command:
configure eaps <name> add control vlan <vlan_name>