User's Manual
Table Of Contents
- 1. INTRODUCTION
- 2. INSTALLATION
- 3. SWITCH MANAGEMENT
- 4. WEB CONFIGURATION
- 4.1 Main Web Page
- 4.2 System
- 4.2.1 Management
- 4.2.1.1 System Information
- 4.2.1.2 IP Configuration
- 4.2.1.3 IP Status
- 4.2.1.4 ARP Configuration
- 4.2.1.5 Users Configuration
- 4.2.1.6 Privilege Levels
- 4.2.1.7 NTP Configuration
- 4.2.1.7.1 System Time Correction Manually
- 4.2.1.8 Time Configuration
- 4.2.1.9 UPnP
- 4.2.1.10 DHCP Relay
- 4.2.1.11 DHCP Relay Statistics
- 4.2.1.12 CPU Load
- 4.2.1.13 System Log
- 4.2.1.14 Detailed Log
- 4.2.1.15 Remote Syslog
- 4.2.1.16 SMTP Configuration
- 4.2.2 Simple Network Management Protocol
- 4.2.3 RMON
- 4.2.4 DHCP server
- 4.2.5 Remote Management
- 4.2.1 Management
- 4.3 Switching
- 4.3.1 Port Management
- 4.3.2 Link Aggregation
- 4.3.3 VLAN
- 4.3.3.1 VLAN Overview
- 4.3.3.2 IEEE 802.1Q VLAN
- 4.3.3.3 VLAN Port Configuration
- 4.3.3.4 VLAN Membership Status
- 4.3.3.5 VLAN Port Status
- 4.3.3.6 Private VLAN
- 4.3.3.7 Port Isolation
- 4.3.3.8 VLAN setting example:
- 4.3.3.8.1 Two Separate 802.1Q VLANs
- 4.3.3.8.2 VLAN Trunking between two 802.1Q aware switches
- 4.3.3.8.3 Port Isolate
- 4.3.3.9 MAC-based VLAN
- 4.3.3.10 IP Subnet-based VLAN
- 4.3.3.11 Protocol-based VLAN
- 4.3.3.12 Protocol-based VLAN Membership
- 4.3.4 VLAN Translation
- 4.3.5 Spanning Tree Protocol
- 4.3.6 Multicast
- 4.3.7 MLD Snooping
- 4.3.8 MVR (Multicast VLAN Registration)
- 4.3.9 LLDP
- 4.3.10 MAC Address Table
- 4.3.11 Loop Protection
- 4.3.12 UDLD
- 4.3.13 GVRP
- 4.4 Quality of Service
- 4.5 Security
- 4.6 Power over Ethernet
- 4.7 ONVIF
- 4.8 Maintenance
- 4.8.1 Web Firmware Upgrade
- 4.8.2 Save Startup Config
- 4.8.3 Configuration Download
- 4.8.4 Configuration Upload
- 4.8.5 Configure Activate
- 4.8.6 Configure Delete
- 4.8.7 Image Select
- 4.8.8 Factory Default
- 4.8.9 System Reboot
- 4.8.10 Ping
- 4.8.11 IPv6 Ping
- 4.8.12 Remote IP Ping
- 4.8.13 Cable Diagnostics
- 4.8.14 Traceroute (IPv4)
- 4.8.15 Traceroute (IPv6)
- 5. COMMAND LINE MODE
- 6. SWITCH OPERATION
- 7. TROUBLESHOOTING
- APPENDIX A: Networking Connection
- APPENDIX B : GLOSSARY
User’s Manual of GS-5220-8P2T2S Managed Switch
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4.3.12 UDLD
Unidirectional Link Detection (UDLD) is a data link layer protocol from Cisco Systems to monitor the physical configuration of
the cables and detect unidirectional links. UDLD complements the Spanning Tree Protocol which is used to eliminate switching
loops..
4.3.12.1 UDLD Port Configuration
This page allows the user to inspect the current UDLD configurations, and possibly change them as well. as screen
in Figure 4-3-12-1 appears.
Figure 4-3-12-1: UDLD Configuration Page Screenshot
The page includes the following fields:
General Settings
Object Description
• Port
Port number of the switch.
• UDLD Mode
Configures the UDLD mode on a port. Valid values
are Disable, Normal and Aggressive. Default mode is Disable.
Disable: In disabled mode, UDLD functionality doesn't exists on port..
Normal: In normal mode, if the link state of the port was determined to be
unidirectional, it will not affect the port state.
Aggressive: In aggressive mode, unidirectional detected ports will get
shutdown. To bring back the ports up, need to disable UDLDon that port
• Message Interval
Configures the period of time between UDLD probe messages on ports that are
in the advertisement phase and are determined to be bidirectional. The range is
from 7 to 90 seconds(Default value is 7 seconds)(Currently default time interval
is supported, due to lack of detailed information in RFC 5171).