User Manual

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Users Manual of XGS-6350-24X4C
Figure 2.5 Backup port
When two switch ports directly connect or both connect to the same LAN, the port with lower priority is to be
the backup port, the other port is to be the designated port. If the designated port breaks down, the backup
port becames the designated port to continue working.
5. Master port
Figure 2.6 Master port
The Master port is the shortest path between MST region and CIST root bridge. Master port is the root port of
the root bridge in the CIST region.
6. Boundary port
The concept of boundary port in CIST is a little different from that in each MSTI. In MSTI, the role of the
boundary port means that the spanning tree instance does not expand on the port.