User's Manual
Table Of Contents
- 1. INTRODUCTION
- 2. INSTALLATION
- 3. SWITCH MANAGEMENT
- 4. WEB CONFIGURATION
- 4.1 Main Web Page
- 4.2 System
- 4.3 Port Management
- 4.4 Link Aggregation
- 4.5 VLAN
- 4.5.1 VLAN Overview
- 4.5.2 IEEE 802.1Q VLAN
- 4.5.3 Management VLAN
- 4.5.4 Create VLAN
- 4.5.5 Interface Settings
- 4.5.6 Port to VLAN
- 4.5.7 Port VLAN Membership
- 4.5.8 Protocol VLAN Group Setting
- 4.5.9 Protocol VLAN Port Setting
- 4.5.10 GVRP Setting
- 4.5.11 GVRP Port Setting
- 4.5.12 GVRP VLAN
- 4.5.13 GVRP Statistics
- 4.5.14 VLAN setting example:
- 4.6 Spanning Tree Protocol
- 4.7 Multicast
- 4.8 Quality of Service
- 4.9 Security
- 4.10 ACL
- 4.11 MAC Address Table
- 4.12 LLDP
- 4.13 Diagnostics
- 4.14 Power over Ethernet (GS-4210-16P2S and GS-4210-24P2S only)
- 4.15 RMON
- 4.16 Maintenance
- 5. COMMAND LINE INTERFACE
- 6. Command Line Mode
- 6.1 User Mode Commands
- 6.2 Privileged Mode Commands
- 6.2.1 clear command
- 6.2.2 clock command
- 6.2.3 configure command
- 6.2.4 copy command
- 6.2.5 debug command
- 6.2.6 delete command
- 6.2.7 disable command
- 6.2.8 end command
- 6.2.9 exit command
- 6.2.10 no command
- 6.2.11 ping command
- 6.2.12 reboot command
- 6.2.13 renew command
- 6.2.14 restore-defaults command
- 6.2.15 save command
- 6.2.16 show command
- 6.2.17 ssl command
- 6.2.18 traceroute command
- 6.2.19 udld command
- 6.3 Global Config Mode Commands
- 6.3.1 aaa Command
- 6.3.2 boot Command
- 6.3.3 bridge Command
- 6.3.4 class-map Command
- 6.3.5 clock Command
- 6.3.6 dos Command
- 6.3.7 dot1x Command
- 6.3.8 do Command
- 6.3.9 enable Command
- 6.3.10 end Command
- 6.3.11 errdisable Command
- 6.3.12 exit Command
- 6.3.13 gvrp Command
- 6.3.14 hostname Command
- 6.3.15 interface Command
- 6.3.16 ip Command
- 6.3.17 ipv6 Command
- 6.3.18 jumbo-frame Command
- 6.3.19 l2 Command
- 6.3.20 lacp Command
- 6.3.21 lag Command
- 6.3.22 line Command
- 6.3.23 lldp Command
- 6.3.24 logging Command
- 6.3.25 mac Command
- 6.3.26 management-vlan Command
- 6.3.27 mirror Command
- 6.3.28 no Command
- 6.3.29 policy-map Command
- 6.3.30 port-security Command
- 6.3.31 qos Command
- 6.3.32 radius Command
- 6.3.33 rate-limit Command
- 6.3.34 rmon Command
- 6.3.35 Snmp Command
- 6.3.36 sntp Command
- 6.3.37 spanning-tree Command
- 6.3.38 storm-control Command
- 6.3.39 system Command
- 6.3.40 tacacs Command
- 6.3.41 udld Command
- 6.3.42 username Command
- 6.3.43 vlan Command
- 6.3.44 voice-vlan Command
- 7. SWITCH OPERATION
- 8. POWER OVER ETHERNET OVERVIEW
- 9. TROUBLESHOOTING
- APPENDIX A
User’s Manual of GS-4210-16T2S_24T2S_16P2S_24P2S_48T4S
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authentication server must support EAP within the native frame format. When the switch receives frames from the
authentication server, the server's frame header is removed, leaving the EAP frame, which is then encapsulated for
Ethernet and sent to the client.
Authentication Initiation and Message Exchange
The switch or the client can initiate authentication. If you enable authentication on a port by using the dot1x port-control auto
interface configuration command, the switch must initiate authentication when it determines that the port link state transitions
from down to up. It then sends an EAP-request/identity frame to the client to request its identity (typically, the switch sends an
initial identity/request frame followed by one or more requests for authentication information). Upon receipt of the frame, the
client responds with an EAP-response/identity frame.
However, if during bootup, the client does not receive an EAP-request/identity frame from the switch, the client can initiate
authentication by sending an EAPOL-start frame, which prompts the switch to request the client's identity
I
f 802.1X is not enabled or supported on the network access device, any EAPOL frames from the
client are dropped. If the client does not receive an EAP-request/identi
ty frame after three attempts
to start authentication, the client transmits frames as if the port is in the authorized state. A port in
the authorized state effectively means that the client has been successfully authenticated.
When the client supplies its identity, the switch begins its role as the intermediary, passing EAP frames between the client and
the authentication server until authentication succeeds or fails. If the authentication succeeds, the switch port becomes
authorized.
The specific exchange of EAP frames depends on the authentication method being used. “Figure 4-9-6” shows a message
exchange initiated by the client using the One-Time-Password (OTP) authentication method with a RADIUS server.
Figure 4-9-6: EAP Message Exchange