, EtherChannel. , STP. () . show cdp neighbors, . . PING IP .

, STP. (). .
AccSwitch-2#conf t AccSwitch-2(config)#int port-channel 1 AccSwitch-2(config-if)#switchport mode trunk CoreSW#conf t CoreSW(config)#int port-channel 10 CoreSW(config)#switchport mode trunk
:
AccSwitch-2(config-if)#int gi1/0/47 AccSwitch-2(config-if)#switchport mode trunk AccSwitch-2(config-if)#channel-group 1 mode on CoreSW (config-if)#int gi2/0/38 CoreSW (config-if)#switchport mode trunk CoreSW (config-if)#channel-group 10 mode on
. DHCP Snooping Dynamic Arp Inspection, ip dhcp snooping trust ip arp inspection trust.
. PING, , TCP . , .
, UpLink . , port-channel. !