Starts periodic ELRP packet transmission on the specified ports of the VLAN using the specified interval.
| vlan_name | Specifies a VLAN name. |
| ports | Specifies the set of VLAN ports for packet transmission. |
| all | Specifies all ports of this VLAN for packet transmission. |
| sec | Specifies the interval (in seconds) between consecutive packet transmissions. The range is 1 to 600 seconds. The default is 1 second. |
| log | Specifies that a message should be logged in the system log file when ELRP packets are received back indicating detection of network loop, or no packets are received within the specified duration. |
| log-and-trap | Specifies that a message should be logged in the system log file and a trap message should be sent to the SNMP manager when ELRP packets are received back indicating detection of network loop, or no packets are received within the specified duration. |
| trap | Specifies that a trap message should be sent to the SNMP manager when ELRP packets are received back indicating detection of network loop, or no packets are received within the specified duration. |
| disable-port | Specifies that the port should be disabled where the looped PDU is received. |
| duration | Specifies a hold time that the port is kept disabled before re-enabling. |
| seconds | The number of seconds the port is kept disabled. |
| permanent | Specifies that the port is disabled permanently. User intervention is required to enable. |
The default interval between consecutive packet transmissions is 1 second.
If a duration in seconds is not specified, the default is permanent.
This command starts periodic ELRP packet transmission on the specified ports of the VLAN using the specified interval. If any of these transmitted packets is returned, indicating loopback detection, the ELRP client performs a configured action of logging a message in the system log file and/or sending a trap to the SNMP manager.
Beginning with ExtremeXOS 12.4, you have the option to automatically disable the port where the looped packet arrives and to specify the time interval for which the port remains disabled. When that specified time expires, the port is automatically enabled.
Should a loop occur on multiple ports, only the first port in the VLAN on which the PDU is received is disabled. The second port is ignored for 1 or 2 seconds and then if another PDU is received, that port is disabled until the loop is gone. This prevents shutting down all ports in the VLAN.
Use either the configure elrp-client one-shot or the run elrp command to configure non-periodic, one-time transmission of ELRP packets.
The ELRP client must be enabled globally in order for it to work on any VLANs. Use the enable elrp-client command to globally enable the ELRP client.
The ELRP client can be disabled globally so that none of the ELRP VLAN configurations take effect. Use the disable elrp-client command to globally disable the ELRP client.
The ExtremeXOS software does not support ELRP and Network Login on the same port.
Use the show elrp command to check the ELRP status and the show elrp disabled-ports command to view details of ELRP disabled ports.
The following example starts periodic ELRP packet transmission on slot 3, port 2 of VLAN marketing, sends packet transmissions every 2 seconds, sends messages to the log, and should a loop be detected, disables the port for 5 seconds:
configure elrp-client periodic marketing ports 3:2 interval 2 log disable-port duration 5
This command was first available in ExtremeXOS 11.1.
The disable port feature was added in ExtremeXOS 12.4.
This command is available on all platforms.
Print
this page
Email this topic
Feedback
View PDF
Download EPUB