Link-State Acknowledgment Packet | D-Link DES-3326 specs

DES-3326 Layer 3 Fast Ethernet Switch User’s Guide

Link-State Update Packet

Version No.

4	Packet Length

Router ID

Area ID

Checksum	Authentication Type

Authentication

Authentication

Number of Advertisements

Link-State Advertisements ...

Figure 5-30. Link-State Update Packet

The body of the Link-State Update packet consists of a list of link-state advertisements. Each advertisement begins with a common 20-byte header, the link-state advertisement header. Otherwise, the format of each of the five types of link-state advertisements is different.

The Link-State Acknowledgment Packet

Link-State Acknowledgment packets are OSPF packet type 5. To make the folding of link-state advertisements reliable, flooded advertisements are explicitly acknowledged. This acknowledgment is accomplished through the sending and receiving of Link-State Acknowledgment packets. Multiple link- state advertisements can be acknowledged in a single Link-State Acknowledgment packet.

Depending on the state of the sending interface and the source of the advertisements being acknowledged, a Link-State Acknowledgment packet is sent either to the multicast address AllSPFRouters, to the multicast address AllDRouters, or as a unicast packet.

The format of this packet is similar to that of the Data Description packet. The body of both packets is simply a list of link-state advertisement headers.

The format of the Link-State Acknowledgment packet is shown below:

Link-State Acknowledgment Packet

Version No.

5	Packet Length

Router ID

Area ID

Checksum	Authentication Type

Authentication

Authentication

Link-State Advertisement Header ...

Figure 5-31. Link-State Acknowledgement Packet

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Image 78

D-Link DES-3326 manual Link-State Acknowledgment Packet, Link-State Update Packet

Contents

DES-3326 Wichtige Sicherheitshinweise Hardware Software Link Offices for Registration and Warranty Service TrademarksCopyright Statement FCC Warning CE Mark WarningVcci Warning Bsmi Warning Page Table of Contents ARP ViiiPage Layer 3 Switching Introduction Functions of a Layer 3 Switch FeaturesPerformance Features Layer 2 Features Layer 3 Switch Features Traffic Classification and Prioritization Management Optional Redundant Power Supply Fast Ethernet TechnologyGigabit Ethernet Technology Installation Desktop or Shelf InstallationUnpacking Rack Installation Installing rubber feet for desktop installation Power on Power Failure Front Panel Rear Panel Side Panels Optional Plug-in Modules1000BASE-T Module 1000BASE-SX Fiber Module 1000BASE-LX Fiber Module LED Indicators Gbic Two-Port Module Switch to End Node Switch to Hub or Switch 10BASE-T Device 100BASE-TX Device Diagnostic console port RS-232 DCE Local Console Management Boot screen IP Addresses and Snmp Community Names Traps Authentication TrapsSnmp performs the following functions MIBs Packet Forwarding Some filtering is done automatically by the switch FilteringMAC Address Aging Time Ameter Description Default Value Spanning Tree Variable Description Default Value Bridge Protocol Data Units Creating a Stable STP Topology STP Port StatesPort transitions from one state to another as follows Feature Default Value STP Port State Transitions User-Changeable STA Parameters Illustration of STP This example, only the default STP values are used Link Aggregation Link Aggregation Group 802.1Q Vlan Packet Forwarding VLANsIeee 802.1Q VLANs Some relevant terms 802.1Q Vlan Tags Ieee 802.1Q Packet Forwarding Port Vlan ID 10. Adding an Ieee 802.1Q Tag VLANs in Layer 2 Only Mode Tagging and UntaggingIngress Filtering IP Addresses Layer 3-Based VLANsIP Addressing and Subnetting Address Classes 255 Subnet Masking Calculating the Number of Subnets and Nodes Classless InterDomain Routing Cidr CID Setting up IP Interfaces Cidr Internet Protocols VID Protocol Layering 11. OSI Seven Layer Network Model Layer 12. The Protocol Stack TCP/IP Packet Headers TCP 13. TCP Packet Header Ethernet 14. IP Packet Header TCP and UDP Well-Known Ports UDP and Icmp Domain Name System Mapping Domain Names to Addresses Domain Name Resolution Dhcp ServersIP Routing Packet Fragmentation and Reassembly Multicasting Multicast GroupsAddress Assignment Internet Group Management Protocol Igmp Igmp Versions 1 11. Igmp Type Codes Multicast Routing Algorithms FloodingMulticast Spanning Trees Reverse Path Broadcasting RPB Reverse Path Multicasting RPM Routing Protocols Protocol-Independent Multicast Dense ModeMulticast Routing Protocols Distance Vector Multicast Routing Protocol Dvmrp RIP Version 1 Message Format 20. RIP v.1 Message Format RIP Version 2 Extensions RIP 1 MessageRIP 1 Route Interpretation RIP2 Message Format Open Shortest Path First Ospf 21. RIP Message Format Ospf Cost Link-State AlgorithmShortest Path Algorithm Shortest Path Tree 22. Constructing a Shortest Path Tree Areas and Border Routers Link-State Packets Message Digest Authentication MD-5 Ospf AuthenticationSimple Password Authentication Backbone and Area Partitioning the Backbone Virtual LinksAreas Not Physically Connected to Area Neighbors Adjacencies Designated Router ElectionBuilding Adjacency Adjacencies on Point-to-Point Interfaces Ospf Packet FormatsOspf Packet Header Hello Packet Field Description 26. Hello Packet Database Description Packet Database Description Packet Link-State Update Packet Link-State Request Packet Link-State Update Packet Link-State Acknowledgment Packet Link-State Advertisement Formats Link State Advertisement Header Router Links Advertisements 33. Routers Links Advertisement 18. Routers Links Advertisements − Network Links Advertisements FieldDescription Summary Link Advertisements Summary Link Advertisements Autonomous Systems External Link Advertisements AS External Link Advertisements 21. AS External System Advertisement Before You Start General Deployment Strategy Vlan Layout Assigning IP Interface Addresses and Subnet Masks to VLANsDefining Static Routes Connecting to the Switch First Time Connecting To The SwitchConsole Usage Conventions Creating User Accounts Initial Console screen Setup User Accounts Menu User Accounts Management Switch Privilege Configuration Management Root User+ Root, User+ and Normal User Privileges Saving Changes Save Changes Confirmation screen Loading Factory Defaults Logging Onto The Switch Console Viewing Current User Accounts To update or delete a user passwordUpdating or Deleting User Accounts To view the current user accounts Deleting a User Account To delete a user account Setting Up The Switch Basic SetupSwitch Information Remote Management Setup Configuring the Switch’s IP Address To set the switch’s IP address Snmp Settings To setup the switch for remote management Setting Up Trap Receivers 100 Configure Ports Port Locking101 Highlight Serial Port Settings and press Enter Serial Port SettingsView Ports 1 to 12 StateEnabled Speed/Duplex Auto Flow Control Console Settings Slip Settings103 To change the switch’s operating mode Switch Operation ModeChanging the Switch Operation Mode Highlight Switch Settings on the Main Menu and press Enter 19. Switch Settings menu 105 Menu Changes with Switch Operating Mode 106 Switch Settings Switch Mode Selection107 That is, how long a learned MAC Address is allowed to Layer 2 Switch Settings300 Remain idle. The Aging Time can be set to any value Switch Settings − Layer 3 IP Routing Protocol Settings Screen Hierarchy 110 BOOTP/DHCP Relay DNS Relay 111 VLANs by Switch Operating Mode Advanced SetupConfiguring VLANs To create a new 802.1Q Vlan Membership ActionVlan Name 113 To set a port as either a Tagged or an Untagged port Tagging U/TTo set the 802.1Q Vlan membership status of a port 114 Example Edit 802.1Q Vlan screen To configure the member ports of an 802.1Q VlanHighlight Configure 802.1Q Port Settings and press Enter 115 From to Configure PortModule PVID# To configure a port’s 802.1Q Vlan settings To edit an existing 802.1Q Vlan117 To edit the 802.1Q Vlan membership of a port To edit a port’s Tagged or Untagged status118 To setup IP Interfaces on the switch 119 Highlight Setup IP Interface and press Enter 120 Layer 3 IP Networking Setup Routing Information Protocol RIP 122 Password 123 Key Setup RIP ConfigurationKey ID 124 Interface Name System125 Setup Ospf 126 Ospf Router Ospf Area SettingState Disabled Current Router Ospf Interface Configuration Router Priority Entered in the MD5 Key Table Configuration menu. WhenArea ID Hello Interval Transit Area Virtual Interface ConfigurationDescription Neighbor Router ID Network Number Area Aggregation ConfigurationStatus Network Route Redistribution Settings Layer 2 Multicast Setup Igmp Snooping Settings133 Ieee 802.1Q Multicast Forwarding To configure Igmp SnoopingSwitch Igmp Snooping Querier StateNon Address VIDMulticast MAC 135 Static Router Port Settings Router Port M136 To setup IP multicasting on the switch Setup IP MulticastMulticast Interface Configuration Layer 3 Multicasting Igmp Enabled Interface Name138 Igmp Interface Configuration Dvmrp 140 To configure Pimdm for an IP interface 141 Join/Prune To configure a port for port mirroringPort Mirroring Interval 60. Mirroring Menu 143 Priority 144 MAC Address Priority LevelLow Source/Destination Src145 Layer 2 Filtering Highlight MAC Address Filter and press Enter146 Source/Destination Layer 3 IP Routing FilteringParameter Description 147 ActionAdd/Modify ForwardingLayer 2 Forwarding Source/Destination Port 149 Action Add Static/Default RoutesIP Forwarding Gateway IP Add/Modify Switch Spanning Tree SettingsStatic ARP Interface Name IP Address MAC Address Forward Delay Status EnabledGroup Default Max. Age STP Group Configuration 153 Port Cost Configure PortsView Ports Priority 75. Link Aggregation screen 155 Group ID Configure Spanning TreeMethod Disabled Group Width Max Age Hello Time Forward Delay STP Group157 Group Name Spanning Tree Port SettingsCreate Spanning Tree Groups 158 From 1 to Layer 2 Switch UtilitiesUtilities 159 Upgrade Firmware from Tftp Server 160 Use Configuration File on Tftp Server Save Settings to Tftp Server161 Layer 3 Utilities Testing Connectivity with PingSave History Log to Tftp Server 162 Bootp Hops Count Limit BOOTP/DHCP RelayRelay Status Disabled Relay Time Threshold0 DNS Relay Server164 To make a static DNS table entry Dnsr Cache StatusDisabledDnsr Static Table Lookup StatusDisabled 165 Domain Name StatusEnabledActionAdd/Edit 166 Layer 2 Network Monitoring To display the network data compiled by the switchNetwork Monitoring 167 Port Utilization To view the port utilization Port Error Packets To view the error statistics for a port169 Port Packet Analysis Unicast RX FramesFrames/sec Multicast RX To search for a particular MAC address Browse MAC AddressTo view the MAC address forwarding table To view the Gvrp status table Browse Router Port To view the Router Port table173 Igmp Snooping To view the Igmp Snooping table174 Layer 3 Network Monitoring Switch HistoryTo view the switch history log To view the Network Monitoring Menu Routing Table To view the contents of the IP Routing tableBrowse IP Address To view the IP address forwarding table Gateway ARP TableMask Hops Ospf Lsdb Table Default IP TableTo view the Default IP Address Table To view the Monitor Lsdb Table Cost 179 Ospf External Lsdb Table To view the IP multicast forwarding table IP Multicast Forwarding TableIgmp Group Table To view the Igmp Group table To view the Dvmrp Routing table Load Factory DefaultsDvmrp Routing Table 182 Reboot To reboot the switch from the console183 111. System Reboot Confirmation screen 184 General Deployment Strategy IntroductionBefore You Start 185 Vlan Layout Assigning IP Network Addresses and Subnet Masks to VLANs186 Management Configuring the SwitchGetting Started Defining Static Routes Switch Configuration Privilege Management Root User+ 188 Reboot and Load Factory Defaults Saving Changes189 Setting a Default Gateway Setting Up Web ManagementSetting an IP Address IP address may alternatively be set manually as follows Saving Configuration Changes Setting the Administrator PasswordSetting Trap Destinations Starting and Stopping the Web-based Manager Web-based Manager’s User Interface Areas of the User Interface192 Area Function 193 Link Menus 194 LinkMenus 195 BOOTP/DHCP Relay DNS Relay 196 IP Address Configuring the Switch’s IP Address Click the Switch Information link in the Configuration menu197 10. IP Address window 198 Subnet Mask Default GatewayManual Management VID 11. Management Station IP Settings window 200 Click the Configure Ports link on the Configuration menu 201 202 Stop Bits Baud RateData Bits 203 Local IP Address Remote IP Address204 Broadcast/Multicas Storm ModeMAC Address Aging Time 10 …1000000 sec 205 Module ports Upper Threshold forBase ports 206 207 18 .1Q Static VLANs window 208 Forbidden TagEgress 209 Pvid 210 To configure the member ports of an 802.1Q Vlan to use Gvrp 211 To configure the member ports of an 802.1Q Vlan to use Gmrp 212 213 25. Setup IP Interface window 214 Active Yes Setup the Routing Information Protocol RIPSubnet Name 215 29. Setup RIP window 216 Ospf 217 AS Border Router State 218 Remove Stub Default CostType 219 Auth Type 220 Neighbor Router 221 Network Number 222 Source Protocol Dest. Protocol223 To edit the IEEE802.1 Multicast Forwarding settings 224 39. Setup Ieee 802.1Q Multicast Forwarding window 225 To setup a static router port 226 42. Multicast Interface Configuration window 227 Max Resp Igmp SettingsVersion 228 Click the Dvmrp Settings link on the IP Multicasting menu Dvmrp SettingsTo configure Dvmrp for an IP interface 229 Click the Pimdm Interface Configuration link PIM-DM SettingsNbr Report Timer Route Cost 231 Source Port Direction Ingress232 State Src To configure a forwarding priority for a given MAC addressLevel Low 233 To enter a MAC address into the filtering table State Scr234 To enter a MAC address into the switch’s forwarding table Forwarding Layer 2 Forwarding235 51. Setup Static Unicast MAC Forwarding window 236 Gateway IP To make a static ARP entry237 STP Switch Settings 238 Configure STP Groups To view the STP Port Settings table 240 To configure a link aggregation group Click the Link Aggregation link on the Configuration menu241 Members State DisabledMaster Port 242 To update the switch’s firmware Update Firmware from ServerUse Configuration File on Server Select Upgrade Firmware from Server on the Maintenance menu To enable and configure Bootp or Dhcp on the switch Save Settings To ServerTo upload a settings file to the Tftp server Save History Log to Server Relay Time Threshold To configure the BOOTP/DHCP Relay interfaceCount Limit 245 Primary Name DNS Relay Static Table Lookup Status DisabledDNS Relay State Secondary Name 0.0 Port Utilization Port ErrorAddress The IP address of the domain name Above Address Table Applications248 Port Error Statistics Update249 RX Frames Update IntervalCRC Error Undersize 72. Port Packet Analysis window 251 Browse MAC Address Sequentially To view the Gmrp Status table 253 Click the Browse Router Port link on the Applications menu 254 Click the Switch History link on the Applications menu 255 Browse the Routing Table 256 Jump Default IP Address TableAddress Mask 257 Ospf Link State Database Table 258 Router ID Lsdb Type Link State ID259 83. Ospf External Lsdb Table window 260 Click the Igmp Group Table link 261 Technical Specifications 262 Physical and Environmental 263 Commands 264 265 Runtime Switching Software Default Settings 266 Blocking State Port in the blocking state does the following267 Listening State Port in the listening state does the following268 Learning State Port in the learning state does the following269 Forwarding State Port in the forwarding state does the following270 Disabled State Disabled port does the following271 Troubleshooting STP Spanning Tree Protocol Failure272 Full/Half Duplex Mismatch 273 Unidirectional Link 274 Packet Corruption Resource ErrorsKnow where the root is located Identifying a Data Loop Know which links are redundant Minimize the number of ports in the blocking state276 Impact of Layer 3 Switching 277 278 Brief Review of Bitwise Logical Operations Index Vlan Offices Norway Link Norway Registration Card