Black Box 8-/16-/24-Port 10/100 PoE PSE Web Smart Switch manual IP Address Assignment, IP address

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Chapter 6: IP Address Assignment

6. IP Address Assignment

For IP address configuration, there are three parameters you need to fill in. They are IP address, Subnet Mask, and Default Gateway and DNS.

6.1 IP address

The address of the network device in the network is used for internetworking communication. Its address structure is shown in Figure 3-11. It is described as “class” because it is split into predefined address classes or categories.

Each class has its own network range between the network identifier and host identifier in the 32 bits address. Each IP address has two parts: network identifier (address) and host identifier (address). The former indicates the network where the addressed host resides, and the latter indicates the individual host in the network which the address of host refers to. The host identifier must be unique in the same LAN. The IP address we used here is version 4, known as IPv4.

32 bit

 

Network identifier

Host identifier

Figure 6-1. IP address structure.

The switch divides IP address into three classes, class A, class B, and class C. The rest of the IP addresses are for multicast and broadcast. The bit length of the network prefix is the same as that of the subnet mask and is denoted as IP address/X, for example, 192.168.1.0/24. Each class has its address range described below.

Class A: Address is less than 126.255.255.255. There are a total of 126 networks can be defined because the address 0.0.0.0 is reserved for default route and 127.0.0.0/8 is reserved for loopback function.

Class B: The IP address ranges between 128.0.0.0 and 191.255.255.255. Each class B network has a 16-bit network prefix followed by a 16-bit host address. There are 16,384 (214)/16 networks that can be defined with a maximum of 65534 (216-2) hosts per network.

Class C: The IP address ranges between 192.0.0.0 and 223.255.255.255. Each class C network has a 24-bit network prefix followed by an 8-bit host address. A total of 2,097,152 (221)/24 networks can be defined with a maximum of 254(28-2) hosts per network.

Class D and E: Class D is a class with the first 4 MSBs (Most Significant Bits) set to 1-1-1-0 and is used for IP Multicast. See also RFC 1112. Class E is a class with the first 4 MSBs set to 1-1-1-1 and is used for IP broadcast.

According to IANA (Internet Assigned Numbers Authority), three specific IP address blocks (called a private IP address) are reserved for extending an internal network. They are listed below.

Class A 10.0.0.0---10.255.255.255

Class B 172.16.0.0---172.31.255.255

Class C 192.168.0.0---192.168.255.255

Refer to RFC 1597 and RFC 1466 for more information. These documents are available at www.faqs.org.

6.2 Subnet Mask

Subnet mask is the sub-division of a class-based network or a CIDR block. The subnet is used to determine how to split an IP address to the network prefix and the host address. It’s designed to use an IP address more efficiently to manage an IP network.

For a class B network, 128.1.2.3, the default subnet mask may be 255.255.0.0. The first two bytes are all 1s. This means more than 60 thousands of nodes in flat IP addresses will be on the same network. It’s too large to manage practically. If

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Contents 16-/24-Port 10/100 PoE PSE Web Smart Switch 16-/24-Port 10/100 PoE PSE Web Smart Switch NOM Statement and CE Directive Normas Oficiales Mexicanas NOM Electrical Safety StatementTable of Contents Table of Contents Specifications Hardware Specifications Management Software Specifications SpecificationsOverview 2.1 Introduction FeaturesWhat’s Included Front and Back Panels 2.4.1 Front Panel OverviewBack Panel LED Indicators LED IndicatorsLED Installing an SFP fiber transceiver into the LPB724A switch Installing an Optional SFP Transceiver ModuleCabling Requirements InstallationPower On Installing Switch to a 19-Inch Wiring Closet RailTypical Network Topology in Deployment Switch Cascading in TopologyVlan LPB708A/LPB716A Set IP Address, Subnet Mask, and Default Gateway IP AddressLogin screen for Web Operation of Web-based Management Password adminIP Address Assignment AdministratorWeb Management Home Overview System IP Configuration Authentication ConfigurationSystem Status System IP Configuration screenPort Management Load Default SettingFirmware Update Reboot DevicePort Mirroring Port Configuration10. Port Mirroring screen Bandwidth Control5 PoE Broadcast Storm ControlVlan Mode Vlan SettingPort-based VLAN- Vlan Member Tag-based Vlan 15. Port-based Vlan Member Setting screen16. Tag-based Vlan screen Tag-based VLAN-VLAN Member17. Tag-based Vlan Member Setting screen Multi to 2 SettingPer Port Counter Counter Category 18. Multi to 2 Setting screenClass of Service QoS Setting Priority Mode21. TCP/UDP Port configuration screen Class of Service- TCP/UDPClass of Service-802.1p Class of Service-IP TOS/DSMAC Address Configuration Class of Service-Physical PortSecurity 2 TCP/UDP Filter Configuration 26. TCP/UDP filtering configuration Spanning Tree STP Bridge Settings27. STP Bridge Settings screen STP Port SettingsTrunking 28. STP Port Settings screenIP Address Assignment Function name Backup/Recovery Backup/RecoveryLogout 32. Miscellaneous Setting screenTroubleshooting IP address IP Address AssignmentSubnet Mask Default Gateway DNS LPB708A, rev