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TP-Link TL-SG2008 manual Network diagram of Dhcp

Models: TL-SG2008

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Figure 5-17 Network diagram of DHCP

For different DHCP clients, DHCP server provides three IP address assigning methods:

(1)Manually assign the IP address: Allows the administrator to bind the static IP address to a

specific client (e.g.: WWW Server) via the DHCP server.

(2)Automatically assign the IP address: DHCP server assigns the IP address without an expiry time limitation to the clients.

(3)Dynamically assign the IP address: DHCP server assigns the IP address with an expiry time. When the time for the IP address expired, the client should apply for a new one.

Most clients obtain IP addresses dynamically, which is illustrated in the following figure.

Figure 5-18 Interaction between a DHCP client and a DHCP server

（1） DHCP-DISCOVER Stage: The Client broadcasts the DHCP-DISCOVER packet to find the DHCP server.

（2） DHCP-OFFER Stage: Upon receiving the DHCP-DISCOVER packet, the DHCP server selects an IP address from the IP pool according to the assigning priority of the IP addresses and replies to the client with DHCP-OFFER packet carrying the IP address and other information.

（3） DHCP-REQUEST Stage: In the situation that there are several DHCP servers sending the DHCP-OFFER packets, the client will only respond to the first received DHCP-OFFER

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TP-Link TL-SG2008 manual Network diagram of Dhcp

Contents

REV1.0.0 1910010984 TL-SG2008Copyright & Trademarks FCC Statement Safety Information Contents Loopback Detection 100 Rmon Package Contents Overview of This Guide About this GuideIntended Readers ConventionsSystem Chapter IntroductionAppendix a Specifications Appearance Description Overview of the SwitchMain Features Introduction¾ LEDs Name Status Indication Rear PanelLogin Login to the SwitchConfiguration Return to Contents ¾ Port Status SystemSystem Info System Summary¾ Bandwidth Utilization Device Description¾ Port Info Status Displays the connection status of the port¾ Device Description System Time¾ Time Info Daylight Saving Time System IP Following entries are displayed on this screen System IPUser Management ¾ IP ConfigUser Table User Status User ConfigPassword Type in a password for users’ login ¾ User InfoSystem Tools Config RestoreConfirm Password Password Display Mode User ID, Name, Access Level and status OperationFirmware Upgrade Config Backup¾ Config Backup System Reset System RebootAccess Control Access SecurityPort SSL ConfigIP Address & Mask MAC AddressKey File ¾ Global Config¾ Certificate Download ¾ Key DownloadSelect Enable/Disable SSH function SSH ConfigDownload ¾ Configuration Procedure¾ Network Requirements Application Example 2 for SSH Page Page Return to Contents Port Config SwitchingPort Mode Port MirrorGroup MirroringIngress NumberEgress ¾ Port Security Port SecurityPort Isolation Port IsolationForward Portlist Display the forwardlist ¾ Port Isolation ConfigLoopback Detection ¾ Port Isolation ListLAG Operation Mode¾ LAG Table LAG TableGroup Number Static LAGMember LAG will delete this LAG Lacp ConfigAdmin Key ¾ Lacp ConfigPort Priority Packets Tx Traffic MonitorTraffic Summary Packets RxReceived Traffic StatisticsRefresh Rate ¾ StatisticsPort MAC AddressBound MAC address Way¾ Search Option Address TableDisplays the corresponding Vlan ID of the MAC address MAC Address Displays the MAC address learned by the switchStatic Address ¾ Address Table¾ Static Address Table Dynamic Address¾ Dynamic Address Table ¾ Aging ConfigBind ¾ Create Filtering Address Filtering Address¾ Filtering Address Table Dhcp Filtering¾ Dhcp Working Principle 17 Network diagram of Dhcp ¾ Dhcp Cheating Attack 19 Dhcp Cheating Attack Implementation ProcedureDhcp Filtering ¾ Dhcp Filtering¾ Trusted Port Vlan ¾ Link Types of ports 802.1Q Vlan¾ Pvid Vlan ConfigTagged Ports Give a name to the Vlan for identificationName Untagged PortsTagged ¾ Network DiagramApplication Example for 802.1Q Vlan UntaggedRequired. On VLAN→802.1Q VLAN→VLAN Config page, create a Required. On VLAN→802.1Q VLAN→VLAN Config page, configureStep Operation Description ¾ STP Elements Spanning Tree¾ Bpdu Comparing Principle in STP mode ¾ STP Timers¾ STP Generation Tips ： Step Operation¾ Mstp Elements ¾ Rstp Elements¾ Port Roles ¾ Port StatesSTP Config STP ConfigMax Age Forward DelayVersion Hello TimeSTP Summary Port ConfigEdge Port PriorityExtPath IntPathMstp Instance Region ConfigInstance Config ¾ Region Config¾ VLAN-Instance Mapping ¾ Instance TableInstance ClearInstance ID Instance Port ConfigPath Cost Port Protect STP Security¾ Bpdu Filter ¾ Root Protect¾ TC Protect ¾ Bpdu ProtectTC Protect 11 TC Protect Application Example for STP FunctionOperation Description On Spanning Tree→STP Config→STP ConfigOn Spanning Tree→MSTP Instance→Region On Spanning Tree→MSTP Instance→InstanceOn Spanning Tree→STP Config→Port Config ¾ Suggestion for Configuration ¾ Multicast Overview Multicast¾ Multicast Address Table ¾ Multicast Address¾ Igmp Snooping Process Igmp SnoopingMulticast IP Port ¾ Igmp Snooping¾ Igmp Snooping Fundamentals Snooping ConfigDescription Displays Igmp Snooping status Member ¾ Igmp Snooping StatusFast Leave Igmp SnoopingMulticast Vlan ¾ Multicast Vlan Vlan On the Multicast→IGMP Snooping→Snooping ConfigMulticast→IGMP Snooping→Multicast Vlan Multicast IP Table Snooping→Port ConfigSnooping→Snooping Config Multicast IPStatic Multicast IP ¾ Create Static Multicast Multicast Filter¾ Static Multicast IP Table Port Filter IP-RangeBound IP-Range ID ¾ Port Filter ConfigAction Mode FilterMulticast→Multicast Filter→Port Filter Port Displays the port number of the switch Query PacketPacket Statistics Multicast→Multicast Filter→IP-RangeReturn to Contents QoS ¾ Priority Mode¾ QoS 802.1Q frame ¾ Schedule ModeSP-Mode Displays the LAG number which the port belongs to ¾ Port Priority ConfigDiffServ Port Priority¾ Priority Level ¾ 802.1P Priority Config2 802.1P/CoS Mapping Required. On QoS→DiffServ→Port PriorityMapping Configuration Procedure Step Operation Description¾ Dscp Priority Config Dscp PriorityPriority Level Schedule Mode¾ Priority Level It ranges from 0 toBandwidth Control ¾ Rate Limit ConfigRate Limit Ingress Rate bps Storm ControlEgress Ratebps Mulitcast Rate Voice VlanBroadcast Rate Bps¾ Port Voice Vlan Mode ¾ Security Mode of Voice Vlan Global ConfigPacket Type Processing Mode OUI address is aging out Port ModeEnter the Vlan ID of the voice Vlan Aging TimeOUI Config Required. On QoS→Voice VLAN→Global Config Required. On VLAN→802.1Q VLAN→VLAN ConfigOptional. On QoS→Voice VLAN→OUI Config page, you Required. On QoS→Voice VLAN→Port ConfigACL Create ACL ConfigACL ACL SummaryRule ID MAC ACL¾ Create ACL ¾ Create MAC ACLMask Standard-IP ACLExtend-IP ACL ¾ Create Standard-IP ACLIP Protocol Policy ConfigPolicy Summary ¾ Create Extend-IP ACLDisplays the ID of the ACL contained in the policy Policy CreateAction Create Index Displays the index of the policy¾ Policy Bind Table Policy BindingBinding Table ¾ Create ActionDirection Displays the binding direction Port BindingVlan Binding Interface¾ VLAN-Bind Table ¾ VLAN-Bind ConfigApplication Example for ACL Enter the ID of the Vlan you want to bindOn ACL→ACL Config→Standard-IP ACL page, select ACL On ACL→ACL Config→ACL Create page, create ACLLimit2 ¾ Snmp Versions Snmp¾ Snmp Overview ¾ Snmp Management Frame¾ MIB Introduction ¾ Snmp Configuration OutlineSnmp Config, Notification and Rmon Snmp ConfigView Type Snmp ViewSnmp Group MIB Object IDSnmp Group Following entries are displayed on this screen ¾ Group Config¾ Group Table Snmp UserPrivacy Password Auth ModeAuth Password Privacy ModeMIB View AccessSnmp Community Community NameOn the SNMP→SNMP Config→SNMP Required. On the SNMP→SNMP Config→GlobalRequired. On the SNMP→SNMP Config→SNMP Config→Global Config page, enable SnmpUDP Port Notification¾ Create Notification IP Address¾ Notification Table TimeoutRmon RetryRmon Group Function History Control¾ History Control Table Alarm Config Event Config¾ Event Table Rising Event VariableSample Type Rising Threshold131 System Monitor MaintenanceCPU Monitor Memory Monitor 12.2 LogLevel Description Time Log TableLevel Description Debugging ¾ Log InfoLog File ¾ Local Log ConfigLocal Log Log BufferHost IP Backup LogRemote Log ¾ Log Host¾ Cable Test Device Diagnostics¾ Backup Log Cable TestLoopback Network DiagnosticsPing ¾ Ping ConfigTracert 10 Tracert Following entries are displayed on this screen ¾ Tracert ConfigAppendix a Specifications Configure TCP/IP component Appendix B Configuring the PCsNow Appendix C Glossary Igmp Query Multicast SwitchingRemote Authentication Dial-in User Service Radius Igmp SnoopingSpanning Tree Algorithm STA Rapid Spanning Tree Protocol RstpSimple Network Management Protocol Snmp Simple Network Time Protocol Sntp