configure elsm ports hellotime
ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
ExtremeWare XOS 11.5 Command Reference Guide
567
configure elsm ports hellotime
configure elsm ports <portlist> hellotime <hello_time>
Description
Configures the ELSM hello timer by specifying the time between consecutive hello messages for the
specified ports.
Syntax Description
Default
The default is 1 second.
Usage Guidelines
ELSM works between two connected ports, and each ELSM instance is based on a single port.
When you enable ELSM on the specified ports, the ports participate in ELSM with their peers and begin
exchanging ELSM hello messages.
ELSM uses two types of hello messages to communicate the health of the network to other ELSM ports:
●
Hello+ — The ELSM-enabled port receives a hello message from its peer and no problem is detected.
●
Hello- — The ELSM-enabled port does not receive a hello message from its peer.
ELSM also has hello transmit states. The hello transmit states display the current state of transmitted
ELSM hello messages. For more information about the hello transmit states, see the
show elsm ports
command.
A high hello timer value can increase the time it takes for the ELSM-enabled port to enter the Up state.
The down timer is (2 + hold threshold) * hello timer. Assuming the default value of 2 for the hold
threshold, configuring a hello timer of 128 seconds creates a down timer of (2 + 2) 128, or 512 seconds.
In this scenario it would take 512 seconds for the port to transition from the Down to the Up state.
If you modify the hello timer on one port, Extreme Networks recommends that you use the same hello
timer value on its peer port.
Example
The following command specifies 5 seconds between consecutive ELSM hello messages for slot 2, ports
1-2 on the switch:
configure elsm ports 2:1-2:2 hellotime 5
portlist
Specifies the port or ports for which the ELSM hello timer should be
configured.
hello_time
Specifies the time in seconds between consecutive hello messages. Use the
same value for the hello interval on peer ports. The default value is 1 second,
and the range is 1 to 128 seconds.
