Link fault signaling (lfs) for 10g, Enabling lfs – Brocade TurboIron 24X Series Configuration Guide User Manual
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Brocade TurboIron 24X Series Configuration Guide
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Link Fault Signaling (LFS) for 10G
TurboIron(config)#int e 3
TurboIron(conf-if-e10000-3)#egress-buffer-threshold level-6 6
These commands set the egress buffer threshold for packets with QoS priority 6 to the level-6
threshold.
To set the egress buffer threshold for a specific QoS priority on multiple ports, enter commands
such as the following.
TurboIron(config)#int e 4 to 5
TurboIron(config-mif-4-5)#egress-buffer-threshold min level-6
These commands set the egress buffer threshold for packets with QoS priority 6 to level 6.
Syntax: [no] egress-buffer-threshold min|level-1|level-2|level-3|level-4|level-5|level-6|max
For
Use the no form of the command to revert back to the default value for the QoS priority. For the
default values, refer to
“Default settings for egress buffer thresholds”
Link Fault Signaling (LFS) for 10G
Link Fault Signaling (LFS) is a physical layer protocol that enables communication on a link
between two 10 Gbps Ethernet devices. When configured on a 10 Gbps Ethernet port, the port can
detect and report fault conditions on transmit and receive ports. Brocade recommends enabling
LFS on both ends of a link.
NOTE
LFS is always enabled on the devices and cannot be disabled. The TurboIron X Series devices
support LFS only with other TurboIron X Series devices.
When LFS is enabled on an interface, the following Syslog messages are generated when the link
goes up or down, or when the TX or RX fiber is removed from one or both sides of the link that has
LFS enabled.
Interface ethernet1, state down - link down
Interface ethernet1, state up
When a link fault occurs, the Link and Activity LEDs turn OFF.
The Link and Activity LEDs turn ON when there is traffic traversing the link after the fiber is
installed.
Enabling LFS
To enable LFS between two 10 Gbps Ethernet devices, enter commands such as the following on
both ends of the link.
TurboIron(config)#interface e 1
TurboIron(config-if-e10000-1)#link-fault-signal
Syntax: link-fault-signal
LFS is OFF by default.