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MES-2110 User’s Guide
161
CHAPTER 21
Troubleshooting
This chapter offers some suggestions to solve problems you might encounter. The
potential problems are divided into the following categories.
• Power, Hardware Connections, and LEDs
• Switch Access and Login
21.1 Power, Hardware Connections, and LEDs
The Switch does not turn on. None of the LEDs turn on.
1 Make sure you are using the power adaptor or cord included with the Switch.
2 Make sure the power adaptor or cord is connected to the Switch and plugged in to
an appropriate power source. Make sure the power source is turned on.
3 Disconnect and re-connect the power adaptor or cord to the Switch.
4 If the problem continues, contact the vendor.
The ALM LED is on.
1 Disconnect and re-connect the power adaptor or cord to the Switch.
2 If the problem continues, contact the vendor.
One of the LEDs does not behave as expected.
- MES-2110 1
- About This User's Guide 3
- Customer Support 4
- Document Conventions 5
- Icons Used in Figures 6
- Safety Warnings 7
- Contents Overview 10
- MES-2110 User’s Guide 10
- Table of Contents 11
- Introduction and 17
- Hardware 17
- CHAPTER 1 19
- 1.1.2 Bridging Example 20
- 1.1.5 Metro Ethernet 22
- Figure 5 Metro Ethernet 23
- CHAPTER 2 25
- 2.3.1.1 Precautions 27
- CHAPTER 3 29
- 3.1.1 Console Port 30
- 3.1.3 Mini-GBIC Slots 31
- 3.1.3.2 Transceiver Removal 32
- 3.1.4 Power Connector 33
- 3.2 LEDs 34
- Basic Configuration 35
- CHAPTER 4 37
- (1234 by default) 38
- 4.3 The Main Screen 39
- LINK DESCRIPTION 42
- 4.5 Switch Lockout 45
- 4.6 Resetting the Switch 45
- Username: admin 46
- Password: 46
- MES-2110> enable 46
- MES-2110# reset default 46
- CHAPTER 5 47
- Chapter 5 System Details 50
- PART III 51
- CHAPTER 6 53
- Chapter 6 Configuration 54
- Chapter 6 Configuration 55
- Status screen as shown next 55
- 6.4 The RMON Status Screen 57
- CHAPTER 7 59
- Chapter 7 Loop Detection 61
- Chapter 7 Loop Detection 62
- CHAPTER 8 63
- Chapter 8 Jumbo Frame 64
- CHAPTER 9 65
- 9.1.2 Guest VLAN 66
- 9.6 Technical Reference 71
- CHAPTER 10 75
- 10.1.2 How STP Works 76
- 10.1.3 STP Port States 77
- Chapter 10 Bridge 79
- Chapter 10 Bridge 80
- CHAPTER 11 83
- 11.3 The VLAN Type Screen 85
- 11.5.1 VLAN Stacking 87
- 11.5.2 VLAN Stacking Example 87
- 11.5.4 VLAN Tag Format 89
- 11.5.5 Frame Format 89
- Table 32 802.1Q Frame 90
- Chapter 11 VLAN 91
- CHAPTER 12 95
- Chapter 12 Bandwidth Control 96
- CHAPTER 13 97
- CHAPTER 14 99
- Chapter 14 Port Mirroring 100
- LABEL DESCRIPTION 100
- CHAPTER 15 101
- 15.3 Static Trunking Example 102
- 15.6 LACP Link Status 105
- Chapter 15 Link Aggregation 106
- CHAPTER 16 107
- 16.2 IGMP Configuration 108
- Chapter 16 IGMP 109
- 16.3 IGMP Status 110
- 16.4 MVR Overview 110
- 16.4.1 Types of MVR Ports 111
- 16.4.2 MVR Modes 111
- 16.4.3 How MVR Works 111
- Chapter 16 IGMP 118
- CHAPTER 17 119
- Chapter 17 IP Source Guard 122
- 17.3 DHCP Binding Table 123
- CHAPTER 18 127
- MAC Table Configuration 128
- Chapter 18 MAC 131
- Chapter 18 MAC 134
- CHAPTER 19 135
- Chapter 19 QoS 137
- 19.4 The Tag Priority Table 139
- Chapter 19 QoS 142
- Management 143
- CHAPTER 20 145
- Table 62 SNMP Commands 147
- 20.4 The SNTP Screen 148
- 20.5 Alarms and Logs 150
- 20.7 The Cable Test Screen 152
- 20.8 The Host DoS Protection 153
- 20.10 Upgrading the Firmware 155
- 20.12 Restarting the System 156
- Troubleshooting & 159
- Product 159
- Specifications 159
- CHAPTER 21 161
- 21.2 Switch Access and Login 162
- CHAPTER 22 165
- FEATURE DESCRIPTION 166
- STANDARD DESCRIPTION 168
- Appendices and 169
- APPENDIX A 171
- Appendix A Changing a Fuse 172
- APPENDIX B 173
- Appendix B Common Services 174
- Appendix B Common Services 175
- APPENDIX C 177
- FCC Warning 178
- CE Mark Warning: 178
- Warning: 178
- Notices 178
- ZyXEL Limited Warranty 179
- Appendix C Legal Information 180
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