Dell N3200-ON EMC Networking N-Series Switches CLI Reference Guide version 6.6 - Page 638

User Guidelines Changes to the DCPDP configuration do not take effect until the protocol is disabled and then re-enabled. Both the local switch and the MLAG peer switch must be configured identically. The recommended procedure to update these parameters is to disable the DCPDP protocol on both switches, configure the new parameters on both switches, and then re-enable the DCPDP protocol on both switches. The Dual Control Plane Detection Protocol is a UDP-based protocol. The administrator must configure this protocol on an IP interface with a VLAN that is not shared with any of the MLAG interfaces. This can include the outof-band port. When enabled, the dual-control plane detection protocol sends a control plane detection message to the peer once every second. The message is unidirectional and contains the sender's MAC address. When a switch receives a control plane detection message it sets the 'peer is UP' variable to TRUE to indicate that a peer is detected. Do not configure DCPDP to use a port reserved by the switch. UDP, TCP and RAW ports reserved by the switch and unavailable for use or configuration are: Ports 1, 17, 58, 255, 546, 547, 2222, 4567, 6343, 49160 Example console(config)#vpc domain 1 console(config-vpc 1)#peer-keepalive enable console(config-vpc 1)#peer-keepalive destination 192.168.0.2 source 192.168.0.1 console(config-vpc 1)#peer detection enable console(config-vpc 1)#exit peer-keepalive enable Use the peer-keepalive enable command to enable the peer keepalive protocol on the peer link. When enabled, if an MLAG switch does not receive keepalive messages from the peer within the timeout value and DCPDP is disabled, the switch begins the process of transitioning to the primary role (if standby). Use the no form of the command to disable the peer keepalive protocol. Layer 2 Switching Commands 638