Ethernet is based on IEEE802.3 standard; Fast Ethernet is based on IEEE802.3u standard; Gigabit Ethernet is based on IEEE802.3z standard.

Router (configuration) # interfaceport-channel1-Create a port channel.

Router (configuration -if)#ip address10.1.1.1255.255.0.

Router (Configuration -if)# Exit

Router (Configuration) # Interface Ethernet 1/0

Router (config-if)#cha?

% Unrecognized command

Router (Configuration -if)# Exit

Router (Configuration) #

Router (Configuration) # Interface Serial 2/0

Router (config-if)#chan?

% Unrecognized command

Router (config-if)# exit- Ethernet and serial ports do not support port channels.

Router (Configuration) #

Router (Configuration) # interface fastEthernet 0/0

Router (configuration -if)# channel group 1

Router (Configuration -if)# Full Duplex

Router (Configuration -if)# Exit

Router (Configuration) # Interface Gigabit Ethernet 3/0

Router (configuration -if)# channel group 1

Error: Interface type does not match port-channel-1. -Interfaces in port channels should be consistent.

Router (Configuration -if)# Exit

2. Optical fiber distributed data interface

The total length of optical fiber ring must be less than 200 kilometers, and there are as many as 500 stations in the 1 FDDI network, and the distance between stations should not exceed 2 kilometers (MMF) or 10 kilometers (SMF).

3. Token ring interface

On the ring network, the running speed of all stations (which can only run at 4Mbit/s or 16Mbit/s) must be the same, otherwise the whole ring network will send out a distress message and cannot run;

Router (Configuration) # Interface Token Ring 2/0

Router (configuration -if)# Ring speed?

16 set the speed to 16Mbps.

4 Set the speed to 4 Mbps-it can only run at 4Mbit/s or16 Mbit/s..

Router (if configured) # Ring speed 16

Router (config-if) # early-token-release-the interface releases the token immediately after sending a frame of data.

4. Loopback interface