VMware Telnet Extension Commands for Proxy Communication Command SyntaxThe VMware telnet extension defines a telnet proxy option for sending notification of vSphere vMotion events to a virtual serial port proxy. A VMware telnet extension command sequence uses the following general format: VMware Telnet Extension OptionOption SubnegotiationThe VMWARE-TELNET-EXT telnet option requires various suboptions to support remote serial port access. The virtual machine and proxy use subnegotiation to indicate the command sets that they can support. Subnegotiation identifies all commands for negotiation as well as commands for proxy support, vMotion notification, and virtual machine identification. Table 2-2 lists the commands for option subnegotiation. Unknown Command ResponseProxy OperationvMotion NotificationVirtual Machine Identification