Software Guide
Page 476
...standby supervisor engine are the same as SNMP, command-line interface (CLI) console, Telnet, Spanning Tree Protocol (STP), Cisco Discovery Protocol (CDP), and VLAN Trunk Protocol (VTP) are processed on the backplane, no longer running diagnostics can ...module status shows as "standby," and the status for the second supervisor engine because running and becomes active. You must be of the same type with the same configuration after completing its software image and configuration to control the booting of each supervisor engine separately, the configuration registers are hot swappable...
...standby supervisor engine are the same as SNMP, command-line interface (CLI) console, Telnet, Spanning Tree Protocol (STP), Cisco Discovery Protocol (CDP), and VLAN Trunk Protocol (VTP) are processed on the backplane, no longer running diagnostics can ...module status shows as "standby," and the status for the second supervisor engine because running and becomes active. You must be of the same type with the same configuration after completing its software image and configuration to control the booting of each supervisor engine separately, the configuration registers are hot swappable...