The Combo interface is also called an optical multiplex interface. It consists of two Ethernet ports (one optical port and one electrical port) on the device panel. The Combo electrical port and its corresponding optical port are logically optically multiplexed. Users can select one of them according to the actual networking situation, but the two cannot work at the same time.
Simply speaking, the optical multiplexer is an interface that can be used as an electrical port or as an optical port. The connection cable is an electrical port, and the optical module is connected to the optical fiber. However, the optical multiplexer cannot use the optical port after using the electrical port, and the electrical port cannot be used after the optical port is used.
Photoelectric multiplex port definition
Connect the chip A port to a high-speed signal bus switch. When the system is not connected to the optical module, the A-1 port works in the electrical interface mode, and the bus switch BS keeps the data signal from the A-1 port through the network port transformer to the network port. When the system is connected to the optical transceiver module, the A-1 port is configured to operate in the optical interface mode, and the bus switch simultaneously switches the data signal to the optical transceiver module, and the indicator control signal is switched along with the data signal. The invention can flexibly realize the multiplexing of the photoelectric interface in the case that the PHY chip has no redundant interface, and can perform function switching between the photoelectric interfaces without any setting, thereby improving product performance and facilitating the condition of limited resources of the PHY chip. Flexible implementation of requirements and cost savings.
How to distinguish the photoelectric multiplexing port
1. How to determine that the physical interface of the switch is a Combo port.
(1) Judging by the switch panel, the interface identifier is the same as the number, and the pair of ports with different media is the combo port.
(2) View through the command line, display interface interface-type x/x/x
E.g:
[Quidway]display interface 2/0/0
GigabitEthernet2/0/0 current state : DOWN
Line protocol current state : DOWN
Switch Port, PVID : 1001, TPID : 8100(Hex), The Maximum Frame Length is 9216
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 4c1f-cc7c-8251
Last physical up TIme: -
Last physical down TIme : 2012-06-29 10:32:19
Current system TIme: 2012-06-29 10:35:39
Port Mode: COMBO AUTO // Indicates that the interface is of the Combo type and is automatically switched.
Current Work Mode: COPPER // Indicates that the current interface is in electrical mode.
Speed ​​: 1000,Loopback: NONE
Duplex: FULL, NegoTIation: ENABLE
Mdi: AUTO
......
2. Switch Combo default type and conversion command summary:
(1) V100R003 and previous versions, the default type of the Combo port is optical port;
(2) In V100R005 and later versions, the default type of the Combo port is automatic switching, and the interface type is first inserted first.
Conversion command: Execute the combo-port { auto (auto) | copper (electric port) | fiber (optical port)} in the interface view.
Electrical Receptacle,Switch Outlet,Grounded Outlet,Duplex Receptacle Outlet
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