Configuration prerequisites, Changing the active port of a combo interface, Introduction to the operating modes – H3C Technologies H3C SR8800 User Manual
Page 9: Introduction to j0 and j1 overhead bytes
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Configuration prerequisites
Before configuring a combo interface, identify which port of the interface is active with the display
interface command:
•
If the output includes “Media type is twisted pair, Port hardware type is 1000_BASE_T”, the copper
combo port is active.
•
If the output includes “Media type is not sure, Port hardware type is No connector”, the fiber combo
port is active.
Changing the active port of a combo interface
To change the active port of a combo interface:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Ethernet interface view.
interface interface-type
interface-number
N/A
3.
Activate the fiber or copper
combo port.
combo enable { copper | fiber }
Optional.
By default, the copper combo port
is active.
CAUTION:
After you activate the fiber combo port, the speed, duplex, and MDI settings will be automatically removed
if the port does not support them.
Configuring the operating mode for a 10-GE interface
Introduction to the operating modes
A ten-GigabitEthernet (10-GE) interface can operate in LAN or WAN mode.
•
In LAN mode, the 10-GE interface transmits Ethernet packets, providing access to an Ethernet
network.
•
In WAN mode, the 10-GE interface transmits synchronous digital hierarchy (SDH) packets,
providing access to an SDH network. In this mode, the interface supports only point-to-point
connections.
CAUTION:
A 10-GE interface in WAN mode encapsulates Ethernet packets as SDH frames, and a 10G packet over
SDH (POS) interface encapsulates PPP packets as SDH frames. However, the two types of interfaces
cannot communicate with each other, because the framing formats used by them are different.
Introduction to J0 and J1 overhead bytes
SDH frames have diversified overhead bytes, which accomplish the operation and maintenance
functions such as hierarchical management of the transport network. J0 and J1 are used to provide
internetworking support between different countries, regions, or vendors.
The regenerator section trace byte J0 is usually set to a section access point identifier. The sending end
keeps connected with the receiving end by sending this byte repeatedly.