LevelOne GEP-2450 Скачать руководство пользователя страница 30 | Manualshive

Страница: 30 / 110

background image

22

This above diagram shows the Ethernet architecture, LLC sub-layer and

MAC sub-layer, which are responded to the Data Link layer, and transceivers, which
are responded to the Physical layer in OSI model. In this section, we are mainly
describing the MAC sub-layer.

3-2. Logical Link Control (LLC)

Data link layer is composed of both the sub-layers of MAC and MAC-client.

Here MAC client may be logical link control or bridge relay entity.

Logical link control supports the interface between the Ethernet MAC and

upper layers in the protocol stack, usually Network layer, which is nothing to do with
the nature of the LAN. So it can operate over other different LAN technology such
as Token Ring, FDDI and so on. Likewise, for the interface to the MAC layer, LLC
defines the services with the interface independent of the medium access
technology and with some of the nature of the medium itself.

The table 3-1 is the

format of LLC PDU. It

Coaxial/STP/UTP

IEEE 802.2 LLC

IEEE802.3 CSMA/CD MAC

IEEE 802.3 PLS

ANSI X3T9.5 PMD

CS

IEEE 802.3

MAU

Physical

Layer

Data

Link

Layer

MII

Fiber

Table 3-1 LLC Format

«
...
28
29
30
31
32
...
»

Содержание GEP-2450

Страница 1: ...GEP 2450 24 GE PoE Plus with 4 GE Combo SFP Web Smart Switch User Manual Rev 1 0 Dec 2012...

Страница 2: ......

Страница 3: ...rmware each of which is referred to as Software in this Agreement BY COPYING OR USING THE SOFTWARE YOU ACCEPT ALL OF THE PROVISIONS AND CONDITIONS OF THIS AGREEMENT THE PROVISIONS EXPRESSED IN THIS AG...

Страница 4: ...copyright in the Software and related documentation will cease being effective at the date of expiration Notwithstanding the termination or expiration of the term of this agreement it is acknowledged...

Страница 5: ...CONCEPT AND MANAGEMENT 21 3 1 WHAT S THE ETHERNET 21 3 2 LOGICAL LINK CONTROL LLC 22 3 3 MEDIAACCESS CONTROL MAC 24 3 4 FLOW CONTROL 29 3 5 HOW DOES A SWITCH WORK 32 3 6 VIRTUAL LAN 36 4 OPERATION OF...

Страница 6: ...4 2 Factory Default 95 4 4 3 Software Upgrade 96 4 4 4 Configuration File Transfer 97 4 4 5 Logout 98 5 MAINTENANCE 99 5 1 RESOLVING NO LINK CONDITION 99 5 2 Q A 99 APPENDIX A TECHNICAL SPECIFICATIONS...

Страница 7: ...device and this switch The switch supports the SFP Vendor includes Manufacture Agilent Avago and Finisa Electronic Emission Notices Federal Communications Commission FCC Statement This equipment has b...

Страница 8: ...rictly prohibited Damage caused by self demolition will be charged for repairing fees Do not place product at outdoor or sandstorm Before installation please make sure input power supply and product s...

Страница 9: ...overs management options and detailed explanation about hardware and software functions Overview of this user s manual Chapter 1 Introduction describes the features of 24 port Gigabit Web Smart PoE Sw...

Страница 10: ...ort supports 10 100 1000Mbps TP or 1000Mbps SFP Fiber with auto detected function 1000Mbps SFP Fiber transceiver is used for high speed connection expansion 1000Mbps LC Multi Mode SFP Fiber transceive...

Страница 11: ...ecklist Before you start installing the switch verify that the package contains the following 24 Port GbE Web Smart PoE Switch Modules optional Mounting Accessory for 19 Rack Shelf This User s Manual...

Страница 12: ...s user management and limits one user to login Maximal packet length can be up to 9600 bytes for jumbo frame application Supports Broadcasting Suppression to avoid network suspended or crashed Support...

Страница 13: ...ts and 4 SFP fiber ports for optional removable modules on the front panel of the switch LED display area locating on the left side of the panel contains a Power LED which indicates the power status a...

Страница 14: ...link on 1000Mbps speed Lit Yellow when TP link on 10 100Mbps speed Off when no link occur 1000SX LX Gigabit Fiber Port 21 22 23 24 LED LINK ACT Green Lit when SFP connection with remote device is goo...

Страница 15: ...isted below 1000Mbps LC MM SFP Fiber transceiver 1000Mbps LC SM 10km SFP Fiber transceiver SFP LC 1000Mbps LC SM 30km SFP Fiber transceiver SFP LC S10 1000Mbps LC SM 50km SFP Fiber transceiver SFP LC...

Страница 16: ...e Note If you have no modules please skip this section 24 Port GbE Web Smart Switch Connecting the SFP Module to the Chassis The optional SFP modules are hot swappable so you can plug or unplug it bef...

Страница 17: ...each RJ 45 port to be connected to a Gigabit 10 100 1000 TP device Now you can start having the switch in operation The switch supports 100 240 VAC 50 60 Hz power supply The power supply will automati...

Страница 18: ...classes by the distance it supports They are SX LX LHX XD and ZX From the viewpoint of connector type there mainly are LC and BIDI SC Gigabit Fiber with multi mode LC SFP module Gigabit Fiber with sin...

Страница 19: ...Converter 56 Bit Time unit 1ns 1sec 1000 Mega bit Bit Time unit 0 01 s 1sec 100 Mega bit Table 2 2 Sum up all elements bit time delay and the overall bit time delay of wires devices must be within Ro...

Страница 20: ...ports both port based VLAN and tag based VLAN They are different in practical deployment especially in physical location The following diagram shows how it works and what the difference they are Case2...

Страница 21: ...VLAN1 and VLAN3 members but they could access VLAN4 members 3 4 VLAN4 members could not access VLAN1 and VLAN3 members but they could access VLAN2 members VLAN3 members could not access VLAN1 VLAN2 a...

Страница 22: ...interface in a highly friendly way Managing 24 Port GbE Web Smart PoE Switch through Ethernet Port Before you communicate with the switch you have to finish first the configuration of the IP address o...

Страница 23: ...d host resides and the latter indicates the individual host in the network which the address of host refers to And the host identifier must be unique in the same LAN Here the term of IP address we use...

Страница 24: ...72 16 0 0 172 31 255 255 Class C 192 168 0 0 192 168 255 255 Please refer to RFC 1597 and RFC 1466 for more information Subnet mask It means the sub division of a class based network or a CIDR block T...

Страница 25: ...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 Length No of IP matched No of Addressable IP 32 1 31 2 30 4 2...

Страница 26: ...efault gateway For the routed packet if the destination is not in the routing table all the traffic is put into the device with the designated IP address known as default router Basically it is a rout...

Страница 27: ...A The switch is suitable for the following applications The switch image is sample only Central Site Remote site application is used in carrier or ISP See Fig 2 10 Peer to peer application is used in...

Страница 28: ...20 Fig 2 12 Office Network Connection Fig 2 11 Peer to peer Network Connection...

Страница 29: ...et was rolled out and provided 1000Mbps Now 10G s Ethernet is under approving Although these Ethernet have different speed they still use the same basic functions So they are compatible in software an...

Страница 30: ...control supports the interface between the Ethernet MAC and upper layers in the protocol stack usually Network layer which is nothing to do with the nature of the LAN So it can operate over other diff...

Страница 31: ...SSAP pair with some reserved values indicates some well known services listed in the table below 0xAAAA SNAP 0xE0E0 Novell IPX 0xF0F0 NetBios 0xFEFE IOS network layer PDU 0xFFFF Novell IPX 802 3 RAW p...

Страница 32: ...irst bit of the first byte in the Destination address DA determines the address to be a Unicast 0 or Multicast frame 1 known as I G bit indicating individual 0 or group 1 So the 48 bit address space i...

Страница 33: ...the left most bit in the SA field is always 0 Length Type This field indicates either the number of the data bytes contained in the data field of the frame or the Ethernet type of data If the value o...

Страница 34: ...first then the next Start of frame Delimiter SFD DA SA and through the data field and FCS field in turn The followings summarize what a MAC does before transmitting a frame 1 MAC will assemble the fr...

Страница 35: ...o most distant devices This maximum time is traded off by the collision recovery time and the diameter of the LAN In the original 802 3 specification Ethernet operates in half duplex only Under this c...

Страница 36: ...oth transmitting and receiving frames are processed simultaneously This doubles the total bandwidth Full duplex is much easier than half duplex because it does not involve media contention collision r...

Страница 37: ...ignal on the medium at that time the device will wait for a period of time known as an inter frame gap time to have the medium clear and stabilized as well as to have the jobs ready such as adjusting...

Страница 38: ...the MAC passes the frame to its client and goes back to the ready state 3 If the frame is too long If yes throws it away and reports frame Too Long 4 If the FCS of the received frame is valid If not...

Страница 39: ...enabled LAN all involved devices must be equipped with VLAN optional function At operating speeds above 100 Mbps the slotTime employed at slower speeds is inadequate to accommodate network topologies...

Страница 40: ...e signals will collide referred to as collision The arbitrator will arbitrate who should gain the media The arbitrator is a distributed mechanism in which all stations contend to gain the media Please...

Страница 41: ...ating in full duplex mode the distance can reach farther than half duplex because it is not limited by the maximum propagation delay time 512 bits time If fiber media is applied the distance can be up...

Страница 42: ...than the aging time the entry will be marked invalid The vacancy is now available for other new MAC Both learning and forwarding are the most important functions in a switch Besides that VLAN can be o...

Страница 43: ...y 2 4 and so on The WRR will transmit the packet with the weight So the packet of each priority level can be allocated a fixed bandwidth Bandwidth rating Bandwidth rating is the limitation set by admi...

Страница 44: ...outer is needed which always lies on the edge of the LAN For a layer 2 VLAN it assumes it is a logical subset of a physical LAN separated by specific rules such as tag port MAC address and so on In ot...

Страница 45: ...LAN it is very hard to do Basically VLAN can afford offering at least 3 benefits move and change users reduce broadcast traffic and increase performance Security Besides VLAN can highly reduce the tra...

Страница 46: ...d to 7 0 0 is the lowest priority CFI Canonical Format Indicator 1 bit long It is used to encapsulate a token ring packet to let it travel across the Ethernet Usually it is set to 0 VLAN ID 12 bits lo...

Страница 47: ...tion rule is described as follows 1 If the VID of the packet is null VID VID 0 or this packet is an untagged packet a If there are still some other ways e g protocol MAC address application IP subnet...

Страница 48: ...ing Database In IVL VLANs use different FIDs Any VID can be assigned to the same FID by administrator How does a Tagged VLAN work If the ingress filtering is enabled and when a packet is received VLAN...

Страница 49: ...o each VLAN Usually we use 10 x x x as internal IP block Because there are total four VLANs in the network we must assign 4 IP blocks to each of them Name VID Network Address Marketing 2 10 1 2 0 24 S...

Страница 50: ...1 Subnet Mask 255 255 255 0 Default Gateway 192 168 1 253 Password admin Table 4 1 When the configuration of your Web Smart Switch is finished you can browse it by the IP address you set up For insta...

Страница 51: ...e it shows the front panel of the switch Linked ports will be displayed in green color and linked off ones will be in black For the optional modules the slots with no module will only show covered pla...

Страница 52: ...44 performed The following list is the main function tree for web user interface Configuration Monitoring Maintenance Root...

Страница 53: ...on VLAN Group Configuration Aggregation LACP RSTP 802 1X IGMP Snooping Mirror QoS Filter Rate Limit Storm Control and SNMP System Information Ports Configuration VLAN Mode Configuration VLAN Group Con...

Страница 54: ...network administrator would not be able to manage the device The switch supports manual IP address setting Fig 4 3 Function name System Configuration Function description Show system description firm...

Страница 55: ...IP Address Show the active IP address of this switch Active Subnet Mask Show the active subnet mask of this switch Active Gateway Show the active gateway of this switch DHCP Server Show the IP addres...

Страница 56: ...ther devices resided in the same network it attaches For more information please also see the Section 2 1 4 IP Address Assignment in this manual Default 255 255 255 0 Fallback Gateway Set an IP addres...

Страница 57: ...49 Default 0...

Страница 58: ...Configuration is applied for the settings of the ports on the switch By this function you can set or reset the values for Mode and Flow Control Others you could set the power saving mode for switch p...

Страница 59: ...plex is comprised of the combination of speed mode 10 100 1000Mbps and duplex mode full duplex and half duplex The following table summarized the function the media supports Media type NWay Speed Dupl...

Страница 60: ...outgoing from any one port of a port based VLAN will be accepted No filtering criterion applies in port based VLAN The only criterion is the physical port you connect to For example for a port based...

Страница 61: ...tion description The VLAN membership configuration for the selected switch can be monitored and modified here Up to 4094 VLANs are supported This page allows for adding and deleting VLANs as well as a...

Страница 62: ...er VLAN aware Enabled Discard other VLAN group packets only forward this port joined VLAN group packets Packet Type All Forward all tagged and untagged packets Tagged Only Forward tagged packets only...

Страница 63: ...show the ID Member of the existed port based VLAN group If you are in tag based VLAN it will show the ID VID Member of the existed tag based VLAN group The switch can store the configuration of port...

Страница 64: ...our VLAN mode selection Member In modify function this is used to enable or disable if a port is a member of the new added VLAN Enable means it is a member of the VLAN Just tick the check box beside t...

Страница 65: ...protected port or a non protected port A destination address on an data packet is matched with a physical address on said layer 2 switch and a forwarding map is generated for the data packet based upo...

Страница 66: ...ports are aggregated into a logical port then this logical port s bandwidth would be as three times high as a single Fast Ethernet port s Function name Aggregation Configuration Function description...

Страница 67: ...ation Parameter description IGMP Enabled Just tick the check box to enable this function Default disable Router Ports Just tick the check box beside the port x to enable router ports then press the Ap...

Страница 68: ...60 Default enable IGMP Querying Enabled After IGMP Enabled function start up then user can tick the check box to enable this function Default enable...

Страница 69: ...we assume that Port A and Port B are Source Ports and Port C is Mirror Port respectively thus the traffic passing through Port A and Port B will be copied to Port C for monitor purpose Parameter desc...

Страница 70: ...uing the trap information The switch supports a switch to turn on or off the SNMP agent If you set the field SNMP Enable SNMP agent will be started up If the field SNMP is set Disable SNMP agent will...

Страница 71: ...with a maximum length of 15 characters and is case sensitive There is not allowed to put any blank in the community name string Any printable character is allowable The community name for each functio...

Страница 72: ...s looping detection frame MAC address the same as oneself from port show Loop detection happens The port will be locked when it received the looping detection frames If you want to resume the locked...

Страница 73: ...t down the port State Show the status on the port Protocol Enabled Controls whether Loop Detection is enabled on this switch port When Port No is chosen and enable port s Loop detection the port can d...

Страница 74: ...red the port will be blocked for a period of time which can be set After a configured time the switch will detect whether the broadcast packets received on the port still exceed the threshold If the b...

Страница 75: ...67 Fig 4 15 Rate Limit Configuration...

Страница 76: ...trom Protection enable Unlock Time The period in seconds for which a port will be kept disabled in the event of a loop is detected and the port action is to shut down the port State Show the status on...

Страница 77: ...on user can configure the settings about PoE The switch complies with IEEE 802 3af protocol and be capable of detecting automatically that whether the device linked to the port on the switch is PD Pow...

Страница 78: ...will stop supplying the power to the port based on the order of the priority Low Normal High in case total power required by all PDs linked to the switch excesses the power limit As the ports have the...

Страница 79: ...splay the information about the PoE status Fig 4 17 PoE Power over Ethernet Status Parameter description Vmain The volt is supplied by the PoE Imain The sum of the current that every port supplies Pco...

Страница 80: ...upply Read Only Temperature The temperature of the chip on PoE Port No Port number Port On Show whether the port is supplying the power to the PD or not AC Disconnect Port Off Port is turned off due t...

Страница 81: ...h will stop supplying the power to the port if it detects that the PD linked to the port is short circuit Over Temp Protection The port of the switch will be disabled due to fast transient rise in tem...

Страница 82: ...allow user to control the PoE function by using the ping command in order to turn on or off any PD which connect with port assign Fig 4 18 PoE Auto Checking Parameter description Ping Check To scroll...

Страница 83: ...ou need to check it is alive Interval Time To set up the spacing interval time to do ping check the default value is 30 seconds The available range is 10 to 120 seconds Retry Time To set up the number...

Страница 84: ...o ping frequency Failure Action To set up when PD is failure and switch action command The values are Nothing and Reboot Remote PD Nothing The switch detects that PD occurs failure and do nothing Rebo...

Страница 85: ...me PoE Scheduling Function description This page allows the user to make a perfect schedule of PoE power supply PoE Scheduling not only makes PoE management easier but also saves more energy Fig 4 19...

Страница 86: ...able Group setting Configure multiple logical ports as same configuration But schedule mode should be setting by per port Copy scheduling To easy copy the port scheduling to another one Week Day Sun M...

Страница 87: ...he priority of VLAN tag Based on priority of VLAN tag it can arrange 0 7 priorities priorities can map to 4 queues of the switch low normal medium high and possess different bandwidth distribution acc...

Страница 88: ...raffic Class based on the arrangement of 6 bit field in DSCP of the IP packet In the switch user is allowed to set up these 64 kinds of Class that belong to any of queue low normal medium high Paramet...

Страница 89: ...81 Queue low normal medium high In default Priority 0 63 are mapping to Queue high Fig 4 22 DSCP Setting...

Страница 90: ...82 4 3 Monitoring There are six functions contained in the monitoring function Monitoring Statistics Overview Detailed Statistics IGMP Status PoE Status Ping...

Страница 91: ...es overview of general traffic statistics for all switch ports Fig 4 23 Statistics Overview for all ports Parameter description Tx Rx Bytes The number of received and transmitted bytes per port Tx Rx...

Страница 92: ...of the packet received RX Octets Total received bytes Rx High Priority Packets Number of Rx packets classified as high priority Rx Low Priority Packets Number of Rx packets classified as low priority...

Страница 93: ...4 byte frames in good and bad packets received Rx 65 127 Bytes Number of 65 126 byte frames in good and bad packets received Rx 128 255 Bytes Number of 127 255 byte frames in good and bad packets rece...

Страница 94: ...versize Number of long frames according to max_length register with valid CRC Rx Fragments Number of short frames 64 bytes with invalid CRC Rx Jabber Number of long frames according tomax_length regis...

Страница 95: ...to which groups it belongs The host then sets a timer with a value less than the Max Response Time field in the query for each group to which it belongs It Calculate the number of times of IGMPV1 repo...

Страница 96: ...for each group to which it belongs It Calculate the number of times of IGMPV3 report V2 Leaves When a host leaves a group it sends a leave group membership message to multicast routers on the network...

Страница 97: ...er Ethernet Configuration Parameter description Power Reservation The watts are supplied by the PoE The maximal power that the switch can supply Read Only Port No Port number PD Class Each PD is class...

Страница 98: ...E not available No PoE chip found PoE not supported for the port PoE turned OFF PoE disabled PoE is disabled by user PoE turned OFF Power budget exceeded The total requested or used power by the PDs e...

Страница 99: ...IP address Set up a Target IP address to ping Count Use drop down menu to set number of echo requests to send Four type of number can choose there are 1 5 10 and 20 Default 1 Time Out in secs Use drop...

Страница 100: ...address Status Show the result of the ping status Received replies Show the received replies number of times Request timeouts Show the timeout of request Average Response times In ms Show the average...

Страница 101: ...93 4 4 Maintenance There are five functions contained in the maintenance function Warm Restart Factory Default Maintenance Software Upgrade Configuration File Transfer Logout...

Страница 102: ...ttings Function name After upgrading software you have to reboot the device to have new configuration take effect The function being discussed here is software reset Warm Restart Function description...

Страница 103: ...ess setting all settings will be restored to the factory default values when Factory Default function is performed If you want to restore all configurations including the IP address setting to the fac...

Страница 104: ...4 4 3 Software Upgrade Function name Software Upgrade Function description You can just click Browse button to retrieve the file you want in your system to upgrade your switch Fig 4 30 Software Upgra...

Страница 105: ...r Function description You can backup your switch s configuration file into your computer folder in case accident happens In addition uploading backup configuration file into a new or a crashed switch...

Страница 106: ...logout and exit the browser the switch will automatically have you logout Besides this manually logout and implicit logout you can set up the parameter of Auto Logout Timer in system configuration fu...

Страница 107: ...2 The uplink connection function fails to work The connection ports on another must be connection ports Please check if connection ports are used on that 24 Port GbE Web Smart Switch Please check the...

Страница 108: ...orts can be in disable mode force mode or auto polling mode Supports Head of Line HOL blocking prevention Supports broadcast storm filtering Web based management provides the ability to completely man...

Страница 109: ...e 10 100Mbps support full or half duplex 1000Mbps support full duplex only Transmission Speed 10 100 1000Mbps for TP 100 1000Mbps for Fiber Full Forwarding Filtering Packet Rate PPS packets per second...

Страница 110: ...fications System Configuration Auto negotiation support on 10 100Base TX ports Web browser can set transmission speed 10 100Mbps and operation mode Full Half duplex on each port enable disable any por...

Отзывы:

Нет отзывов

Похожие инструкции для GEP-2450

SANbox 5600 Series

Бренд: Qlogic Страницы: 408

Бренд: Meridian Страницы: 16

Бренд: DANLERS Страницы: 2

Бренд: Baxall Страницы: 33

EtherDevice EDS-4009 Series

Бренд: Moxa Technologies Страницы: 18

Бренд: TP-Link Страницы: 2

Raritan Dominion LX II

Бренд: LEGRAND Страницы: 7

Бренд: Aastra Страницы: 52

Бренд: Mach Power Страницы: 12

Бренд: Magnum Страницы: 3

Cyber SWITCH 1000

Бренд: Cabletron Systems Страницы: 106

VH M 1 1 1 Series

Бренд: Jlso Tec Trade Страницы: 15

Бренд: PNI Страницы: 92

Бренд: Orno Страницы: 2

Бренд: StarTech.com Страницы: 16

Бренд: Zektor Страницы: 13

exta WZM-01 Series

Бренд: Zamel Страницы: 2

Бренд: Omega Страницы: 8

Бренды по названию

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Популярные бренды

Загрузить еще бренды