KTI Networks KGS-2404 manual Prefix Length No. of IP matched No. of Addressable IP

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In this diagram, you can see the subnet mask with 25-bit long, 255.255.255.128, contains 126 members in the sub-netted network. Another is that the length of network prefix equals the number of the bit with 1s in that subnet mask. With this, you can easily count the number of IP addresses matched. The following table shows the result.

Prefix LengthNo. of IP matchedNo. of Addressable IP

 

/32

1

-

 

 

 

 

 

 

 

/31

2

-

 

 

 

 

 

 

 

/30

4

2

 

 

 

 

 

 

 

/29

8

6

 

 

 

 

 

 

 

/28

16

14

 

 

 

 

 

 

 

/27

32

30

 

 

 

 

 

 

 

/26

64

62

 

 

 

 

 

 

 

/25

128

126

 

 

 

 

 

 

 

/24

256

254

 

 

 

 

 

 

 

/23

512

510

 

 

 

 

 

 

 

/22

1024

1022

 

 

 

 

 

 

 

/21

2048

2046

 

 

 

 

 

 

 

/20

4096

4094

 

 

 

 

 

 

 

/19

8192

8190

 

 

 

 

 

 

 

/18

16384

16382

 

 

 

 

 

 

 

/17

32768

32766

 

 

 

 

 

 

 

/16

65536

65534

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 2-3

 

 

According to the scheme above, a subnet mask 255.255.255.0 will partition a network with the class C. It means there will have a maximum of 254 effective nodes existed in this sub-netted network and is considered a physical network in an autonomous network. So it owns a network IP address which may looks like 168.1.2.0.

With the subnet mask, a bigger network can be cut into small pieces of network. If we want to have more than two independent networks in a worknet, a partition to the network must be performed. In this case, subnet mask must be applied.

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Contents KGS-2404 Page Release Table of Contents 100 Federal Communications Commission FCC Statement 06/28/2007 03/13/2007 02/10/2007About this user’s manual Key Features in the Device Overview of 24-Port GbE Web Smart SwitchVlan Features ChecklistHardware ManagementPage User Interfaces on the Front Panel Button, LEDs and Plugs View of 24-Port GbE Web Smart SwitchUser Interfaces on the Rear Panel LED IndicatorsSystem LED 10/100/1000Ethernet TP Port 1 to 24 LEDFront View of 1000Base-SX/LX LC, SFP Fiber Transceiver View of the Optional ModulesHardware and Cable Installation Starting 24-Port GbE Web Smart Switch UpConnecting the SFP Module to the Chassis Power On TP Port and Cable InstallationCabling Requirements Firmware LoadingCabling Requirements for 1000SX/LX SFP Module Cabling Requirements for TP PortsTypical Network Topology in Deployment 1000Base-X TP, Fiber 100Base-TX TP 100Base-FX FiberNo Vlan Configuration Diagram Case 2b Port-based Vlan See -4 Page Management through Ethernet Port Managing 24-Port GbE Web Smart Switch through Ethernet PortIP Address Assignment Login Screen for Web110 10000000.00000001.00000010.1 Prefix Length No. of IP matched No. of Addressable IP Page 10 Network Connection between Remote Site and Central Site Typical Applications11 Peer-to-peer Network Connection What’s the Ethernet Basic Concept ManagementIEEE802.3 CSMA/CD MAC STP Bpdu SnapARP SAP Format Media Access Control MACFCS PRE SFDPage How does a MAC work? Bytes DTE Flow Control Page Bits How does a switch work? Collision Domain Page Page Virtual LAN Page Tag Format CFIPage Page VID Link Aggregation 10 Example of Link Aggregation Application Operation of Web-based Management Web Management Home Overview Information of Page Layout Snmp Lacp RstpFunction description System ConfigurationPage Page ON/OFF Port ConfigurationPort Configuration Vlan Mode ConfigurationSelect Vlan Mode VID Vlan Group ConfigurationAdd or Remove Vlan Member Page Aggregation 10 Aggregation/Trunking ConfigurationLacp 11 Lacp Port ConfigurationRstp Rstp Port Configuration Page Page Page Port Mode Port Control Authentication Port Status Radius IP 16 802.1X Configuration 802.1x Parameters Vlan ID Igmp Snooping20 Mirror ports configuration Mirror Configuration21 QoS Configuration QoSQuality of Service ConfigurationQoS Configuration Dscp Setting Dhcp Filter24 Filter Configuration Rate Limit 25 Rate Limit ConfigurationStorm Control 26 Storm Control ConfigurationPage Parameters description Snmp27 Snmp Configuration Statistics Overview Monitoring28 Statistics Overview for all ports Detailed Statistics Page 29 Detailed Statistics for each port 30 Lacp Status Lacp StatusRstp Status 31 Rstp Status Igmp Status 32 Igmp Status Ping Status33 Ping Maintenance 34 Warm Restart Warm RestartFactory Default 36 Software Upgrade Software UpgradeFunction description Configuration File TransferLogout Q&A Resolving No Link ConditionAppendix a Technical Specifications SFP ƒ Network Interfaceƒ MAC Address and Self-learning 8K MAC address ƒ Cable and Maximum Lengthƒ Power Requirement ƒ Diagnostic LEDAmbient Temperature DimensionsManagement Software Specifications From RFC1213-MIB PRIVATE-GESM-SW24L-MIB Definitions = Begin ImportsFrom RFC1155-SMI OBJECT-TYPE