ZyXEL Communications VES-1000 Series, Руководство пользователя, Страница: 148 / 227

VES-1000 Series Ethernet Switch
20-6 System Maintenance 1
Table 20-2 Port Statistics
FIELD DESCRIPTION
Rate This is the VDSL raw speed.
Fc This is the carrier frequency
SNR The higher the SNR (Signal-to-Noise Ratio) number, the better. SNR (Signal-to-Noise
Ratio is the ratio of the amplitude of the desired signal to the amplitude of noise signals at
a given point in time.
MSE Minimum Square Error. The minimum mean-square error (also known as MMSE)
performance measure is a popular metric for optimal signal processing.
RS_ERR This is the Reed-Solomon error count. Reed-Solomon codes are block-based error
correcting codes that are used to correct errors in many systems.
PSD This is the Power Spectrum Density.
DISC This is a VDSL Disconnect counter.
20.2.2 Spanning Tree Protocol Status
Verify STP status in this menu.
1.
Enter 24 from the main menu to go to Menu 24 – System Maintenance .
2.
Enter 1 to open Menu 24.1 – System Status .
3.
Enter 2 to open Menu 24.1.2 — System Maintenance — Spanning Tree Protocol Status .
Figure 20-5 Menu 24.1.2 - Spanning Tree Protocol Status
Table 20-3 Menu 24.1.2 - Spanning Tree Protocol Status
FIELD DESCRIPTION
Spanning Tree
Protocol This field shows if the switch is enabled to participate in an STP-compliant network.
Root Bridge The following six fields relate to the root bridge.
Bridge ID This is a unique identifier for this bridge, consisting of bridge priority plus MAC address.
Menu 24.1.2 - Spanning Tree Protocol Status
Spanning Tree Protocol= Running
Root Bridge: Our Bridge:
Bridge ID: 8000-00a0c5451da7 Bridge ID: 8000-00a0c5451da7
Cost to Bridge: 0 Hello Time(Time (sec): 2
PortID: 0X0000 Max Age(Age (sec): 20
Hello Time(Time (sec): 2 Forward Delay (sec): 15
Max Age(Age (sec): 20
Forward Delay(Delay (sec): 15
Topology:
Change Times: 0
Time Since Last Change: 0:00:16
Press ESC to return: