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Signamax

™

 065-7840C-WS 24-Port 10/100/1000BaseT/TX WebSmart Switch

 

 Publication date: June, 2011 
 Revision 1.0

 

28

Ethernet MAC transmits frames in half-duplex and full-duplex ways. In half-

duplex operation mode, the MAC can either transmit or receive frame at a moment, 
but cannot do both jobs at the same time.  

As the transmission of a MAC frame with the half-duplex operation exists 

only in the same collision domain, the carrier signal needs to spend time to travel to 
reach the targeted device. For two most-distant devices in the same collision 
domain, when one sends the frame first, and the second sends the frame, in worst-
case, just before the frame from the first device arrives. The collision happens and 
will be detected by the second device immediately. Because of the medium delay, 
this corrupted signal needs to spend some time to propagate back to the first device. 
The maximum time to detect a collision is approximately twice the signal 
propagation time between the two 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 condition, when in 10 Mbps  LAN, it’s 2500 meters, in 100 Mbps  LAN, 
it’s approximately 200 meters and in 1000 Mbps , 200 meters. According to the 
theory, it should be 20 meters. But it’s not practical, so the LAN diameter is kept by 
using to increase the minimum frame size with a variable-length non-data extension 
bit field which is removed at the receiving MAC. The following tables are the frame 
format suitable for 10M, 100M and 1000M Ethernet, and some parameter values 
that shall be applied to all of these three types of Ethernet. 

Actually, the in-practice Gigabit Ethernet chips do not feature this so far. 

They all have their chips supported in the full-duplex mode only, as well as all 
network vendors’ devices. So this criterion should not exist at the present time and 
in the future.    The switch’s Gigabit module supports only full-duplex mode. 

 

 

 

 

Fig. 3-4 Gigabit Ethernet Frame 

64 bytes 

Содержание 065-7940C-WS

Страница 1: ...Port 10 100 1000BaseT TX WebSmart Switch Publication date June 2011 Revision 1 0 i Signamax Connectivity Systems Model 065 7940C WS 24 Port 10 100 100BaseT TX Layer 2 WebSmart Switch With 4 SFP Dual M...

Страница 2: ...ation date June 2011 Revision 1 0 ii 065 7940C WS 24 Port Gigabit WebSmart Switch with 4 SFP Mini GBIC slots User Manual V1 0 June 2011 2011 Signamax Inc All rights reserved All brand and product name...

Страница 3: ...hardware unit with pre enabled software or firmware 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...

Страница 4: ...ver all of the restrictions in regard to Manufacturer s copyright in the Software and related documentation will cease being effective at the date of expiration Notwithstanding the termination or expi...

Страница 5: ...Agent of the Signamax 065 7940C WS 24 Port GbE WebSmart Switch 14 2 1 4 IP Address Assignment 15 2 2 TYPICAL APPLICATIONS 20 3 BASIC CONCEPT AND MANAGEMENT 22 3 1 WHAT S ETHERNET 22 3 2 MEDIAACCESS C...

Страница 6: ...g Status 93 4 4 MAINTENANCE 95 4 4 1 Warm Restart 96 4 4 2 Factory Default 97 4 4 3 Software Upgrade 98 4 4 4 Configuration File Transfer 99 4 4 5 Logout 100 5 MAINTENANCE 101 5 1 RESOLVING NO LINK CO...

Страница 7: ...Signamax 065 7840C WS 24 Port 10 100 1000BaseT TX WebSmart Switch Publication date June 2011 Revision 1 0 vii Revision History Release Date Revision 1 00 06 23 2011 A1...

Страница 8: ...is device Fig Addition an arrester between outdoor device and this switch The switch supports the SFP Vendor includes Manufacturer Agilent Avago and Finisar Electronic Emission Notices Federal Communi...

Страница 9: ...ision 1 0 ix Warning Self demolition on Product is strictly prohibited Damage caused by self demolition will be charged repair fees Do not place product outdoors or in a sandstorm Before installation...

Страница 10: ......

Страница 11: ...stall your Signamax 065 7940C WS WebSmart Switch This guide also covers management options and detailed explanation about hardware and software functions Overview of this user s manual Chapter 1 Intro...

Страница 12: ...media TP and SFP Fiber LC BiDi SC this port supports 10 100 1000 Mbps TP or 1000 Mbps SFP Fiber with auto detected function 1000 Mbps SFP Fiber transceiver is used for high speed connection expansion...

Страница 13: ...ive immediately if any of the aforementioned items is missing or damaged 1 3 Features The Signamax 065 7940C WS 24 Port GbE WebSmart Switch a standalone off the shelf switch provides the comprehensive...

Страница 14: ...l packet length can be up to 9600 bytes for jumbo frame application Supports Broadcasting Suppression to avoid network suspension or crashes Supports sending of a trap event while monitored events are...

Страница 15: ...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 and 24 ports working status of the swit...

Страница 16: ...ce is good Blinks when any traffic is present 10 100 1000 Mbps Green Amber Lit Green when TP link on 1000 Mbps speed Lit Amber when TP link on 100 Mbps speed Off when 10 Mbps or no link occur Blinks w...

Страница 17: ...sted below Part Number Description 065 79SXMG 1000BaseSX SFP Module MM LC 220m Span on 62 5 m Fiber 550m Span on 50 m Fiber 065 79SXEDMG 1000BaseSX SFP Module 1310 nm MM LC 2 km 065 79LXMG 1000BaseLX...

Страница 18: ...to power source Installing Optional SFP Fiber Transceivers to the 24 Port GbE WebSmart Switch Note If you have no modules please skip this section Connecting the SFP Module to the Chassis The optional...

Страница 19: ...a workstation or a server Repeat the above steps as needed for each RJ 45 port to be connected to a Gigabit 10 100 1000 TP device Now you can start having the switch in operation Power On The switch s...

Страница 20: ...complex and comprehensive contrast to TP cabling in the fiber media Basically there are two categories of fiber multi mode MM and single mode SM The later is categorized into several classes by the di...

Страница 21: ...m Cat 5 TP Wire 1 12 m Fiber Cable 1 0 m Fiber Cable 10 10 m TP to fiber 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...

Страница 22: ...is defined by what VLAN you are using The switch supports both port based VLAN and tag based VLAN They are different in practical deployment especially in physical location The following diagram show...

Страница 23: ...bers 2 VLAN2 members could not access VLAN1 and VLAN3 members but they could access VLAN4 members 3 VLAN3 members could not access VLAN1 VLAN2 and VLAN4 4 VLAN4 members could not access VLAN1 and VLAN...

Страница 24: ...UI for the switch is a highly friendly way to manage the switch Managing the 065 7940C WS Switch through the Ethernet Port Before you communicate with the switch you have to first finish the configura...

Страница 25: ...entifier 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 And the host identifi...

Страница 26: ...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 Please refer to RFC 1597 and RFC 1466 for more information Subnet mask The Subnet Mask means the sub di...

Страница 27: ...am you can see the subnet mask that is 25 bits long 255 255 255 128 contains 126 members in the sub netted network Another is that the length of the network prefix equals the number of the bits with 1...

Страница 28: ...ent networks in a worknet a partition to the network must be performed In this case subnet mask must be applied For different network applications the subnet mask may look like 255 255 255 240 This me...

Страница 29: ...ebSmart Switch Publication date June 2011 Revision 1 0 19 For sure an IP address such as 192 168 1 x must be set on your PC Second Subnet Mask as shown in the Fig 2 9 enter 255 255 255 0 Any subnet ma...

Страница 30: ...on the specification of the switch please refer to Appendix A The switch is suitable for the following applications Central Site Remote site application is used in carrier or ISP See Fig 2 10 Peer to...

Страница 31: ...Signamax 065 7840C WS 24 Port 10 100 1000BaseT TX WebSmart Switch Publication date June 2011 Revision 1 0 21 Fig 2 12 Office Network Connection Fig 2 11 Peer to peer Network Connection...

Страница 32: ...re interface In 1998 Gigabit Ethernet was rolled out and provided 1000 Mbps Now 10G s Ethernet is under approving Although these Ethernet have different speed they still use the same basic functions S...

Страница 33: ...or bridge relay entity Logical link control supports the interface between the Ethernet MAC and upper layers in the protocol stack usually the Network Layer which has nothing to do with the nature of...

Страница 34: ...bit command or response The DSAP and 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 la...

Страница 35: ...3 Ethernet MAC address The first 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...

Страница 36: ...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 of first two bytes is less than or equa...

Страница 37: ...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 frame First th...

Страница 38: ...wice the signal propagation time between the two 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 Eth...

Страница 39: ...half duplex mode In full duplex operation mode both transmitting and receiving frames are processed simultaneously This doubles the total bandwidth Full duplex is much easier than half duplex because...

Страница 40: ...ady to transmit data out and if there is no carrier signal 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...

Страница 41: ...sical address that the receiving MAC owns or the multicast address designated to recognize If not discards it and the MAC passes the frame to its client and goes back to the ready state 3 If the frame...

Страница 42: ...ppens in a network interface card the MAC will deprive of the tag header and process it in the same way as a basic normal frame For a VLAN enabled LAN all involved devices must be equipped with VLAN o...

Страница 43: ...ts data within the same slot time the 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 stati...

Страница 44: ...ike a bridge does And what s more when operating 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 fi...

Страница 45: ...time this means the traffic using that entry has not come for a while If this time period is more than the aging time the entry will be marked invalid The vacancy is now available for other new MACs...

Страница 46: ...the packet with a priority level say 5 7 and next set another weight to the packet with a priority level say 2 4 and so on The WRR will transmit the packet with the higher weight So the packet of each...

Страница 47: ...d to communicate with the station outside the LAN a router 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 specif...

Страница 48: ...or join a new user somewhere in the building to VLAN Without VLAN it is very hard to do Basically VLAN can offer at least 3 benefits move and change users reduce broadcast traffic and increase perform...

Страница 49: ...Priority CFI VLAN identifier Fig 3 9 Tag Format VLAN Protocol ID 8100 is reserved for VLAN tagged frame User Priority 3 bits long User priority is defined to 7 0 0 is the lowest priority CFI Canonical...

Страница 50: ...destination ports belong to the same VLAN with that PVID If the destination ports are members of the VLAN used by ingress port the packet will be forwarded Note VID can not be 0 or 4095 Ingress Rule E...

Страница 51: ...m forwarding process with VID and DA When a packet is received if it has a non zero VID then FID will offer the associated outgoing ports information to the packet In SVL VLANs use the same Filtering...

Страница 52: ...17 18 19 23 24 Table 3 6 Next assigns IP address to each VLAN Usually we use 10 x x x as the internal IP block Because there are total four VLANs in the network we must assign 4 IP blocks to each of...

Страница 53: ...st of that choice may be beyond your budget and the solution caused by the limitation of hardware performance may not be scalable If the item 2 is the case now there is not much more extra cost and th...

Страница 54: ...are switch to switch switch to station and station to station Here station may be a host or a router Link Aggregation sometimes called port trunking has two types of link configurations static port t...

Страница 55: ...5 7940C WS switch are listed in the table below IP Address 192 168 1 1 Subnet Mask 255 255 255 0 Default Gateway 192 168 1 254 Password admin Table 4 1 When the configuration of your WebSmart Switch i...

Страница 56: ...ation page 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 co...

Страница 57: ...Signamax 065 7840C WS 24 Port 10 100 1000BaseT TX WebSmart Switch Publication date June 2011 Revision 1 0 47 Configuration Monitoring Maintenance Root...

Страница 58: ...tem Configuration Ports Configuration VLAN Mode Configuration VLAN Group Configuration Aggregation LACP RSTP 802 1X IGMP Snooping Mirror QoS Filter Rate Limit Storm Control and SNMP System Configurati...

Страница 59: ...e 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 fir...

Страница 60: ...ubnet Mask Show the active subnet mask of this switch Active Gateway Show the active gateway of this switch DHCP Server Show the IP address of the DHCP server Default 0 0 0 0 Lease Time Left Show the...

Страница 61: ...s 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 Sets an IP address for a ga...

Страница 62: ...tion Function name Port Configuration Function description Port 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...

Страница 63: ...plex is comprised of the combination of speed mode 10 100 1000 Mbps and duplex mode full duplex and half duplex The following table summarized the function the media supports Media type NWay Speed Dup...

Страница 64: ...nto smaller ones With proper configuration you can gain not only improved security and increased performance but also save a lot of VLAN management effort Function name VLAN Mode Setting Function desc...

Страница 65: ...ntifies its member by VID This is quite different from port based VLAN If there are any more rules in ingress filtering list or egress filtering list the packet will be screened with more filtering cr...

Страница 66: ...t The range of VID number is from 1 to 4094 User also can choose ingress filtering rules to each port There are two ingress filtering rules which can be applied to the switch The Ingress Filtering Rul...

Страница 67: ...must carry VLAN tag header Access means the outgoing packets carry no VLAN tag header If packets have double VLAN tags one will be dropped and the other will still be left As to Hybrid it is similar...

Страница 68: ...e the configuration of port based VLAN and tag based VLAN separately When you choose a VLAN mode the switch will bring you the responded VLAN configuration which keeps the default data You can easily...

Страница 69: ...ust tick the check box beside the port x to enable it Add Group Creates a new port based VLAN or tag based VLAN which depends upon the VLAN mode you choose in the VLAN mode function Fig 4 8 Add or Rem...

Страница 70: ...Signamax 065 7840C WS 24 Port 10 100 1000BaseT TX WebSmart Switch Publication date June 2011 Revision 1 0 60 Fig 4 9 Port Based VLAN Configuration...

Страница 71: ...aggregation For example if three Fast Ethernet ports are aggregated into a logical port then this logical port s bandwidth would be three times as high as a single Fast Ethernet port s bandwidth Func...

Страница 72: ...runk groups When you enable LACP link aggregation on a port the port can automatically negotiate with the ports at the remote end of a link to establish trunk groups LACP also allows port redundancy t...

Страница 73: ...on date June 2011 Revision 1 0 63 Parameter description Protocol Enabled Just tick the check box to enable LACP protocol then press the Apply button to apply Key Value It s key for an aggregation This...

Страница 74: ...ot switch root port and designated port The switch with the highest priority lowest numeric value becomes the STP root switch If all switches have the same priority the switch with the lowest MAC addr...

Страница 75: ...ription Protocol Enabled Just tick the check box beside the port x to enable RSTP protocol then press the Apply button to apply Edge Just tick the check box beside the port x to enable edge function P...

Страница 76: ...Port Access Entity by exchanging the authentication message when the Authenticator PAE request to it Authenticator An entity facilitates the authentication of the supplicant entity It controls the sta...

Страница 77: ...RADIUS switch at the central location acts Authenticator connecting to PC A and A is a PC outside the controlled port running Supplicant PAE In this case PC A wants to access the services on device B...

Страница 78: ...for inputting user password via the authenticator PAE 7 The supplicant will convert user password into the credential information perhaps in MD5 format and replies an EAP Response with this credential...

Страница 79: ...uish the device s MAC address and its VID The following table is the summary of the combination of the authentication status and the port status versus the status of port mode set in 802 1x Port mode...

Страница 80: ...peration mode of authorization There are three type of operation mode supported Force Unauthorized Force Authorized Auto y Force Unauthorized The controlled port is forced to hold in the unauthorized...

Страница 81: ...tinue Fig 4 16 802 1X Configuration Statistics Choose the port on which you want to show 802 1X statistics the screen includes Authenticator counters backend Authenticator counters dot1x MIB counters...

Страница 82: ...enter his or her username and password to stay connected to the port Parameter description Reauthentication Enabled Choose whether regular authentication will take place in this port Default disable...

Страница 83: ...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 Apply button to start up Default none Unregister...

Страница 84: ...ch supports one port mirror multi ports For example 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...

Страница 85: ...le disable QoS Mode and set Priority Control such as 802 1p and DSCP The switch only supports Strict Priority High priority queue is always passed first Function name 802 1p QoS Mode Function descript...

Страница 86: ...1990s the IETF redefined the meaning of the 8 bit SERVICE TYPE field to accommodate a set of differentiated services DS Under the differentiated services interpretation the first six bits comprise a...

Страница 87: ...0 77 When Custom is selected for Prioritize Traffic you may assign specific Port Number for DSCP Configuration DSCP Configuration 64 kinds of priority traffic as mentioned above user can set up any o...

Страница 88: ...on to make this function take effect Fig 4 24 Filter Configuration Parameter description Source IP Filter Mode There are three types of mode in this drop down menu Default is disabled Disabled Allow a...

Страница 89: ...evision 1 0 79 IP Address Setting up the IP Address it can be one IP Address or a LAN IP Mask Setting up the IP Subnet Mask related with the IP Address DHCP Server Allowed Just tick the check box unde...

Страница 90: ...e June 2011 Revision 1 0 80 4 2 13 Rate Limit Function name Ingress and Egress Bandwidth Setting Function description Ingress and Egress Bandwidth Setting function are used to set up the limit of Ingr...

Страница 91: ...ted if flow control is enabled The format of the packet limits to unicast broadcast and multicast Valid value of Port 1 24 ranges is from Rate1 to 29 Default No Limit Egress Set up the limit of Egress...

Страница 92: ...nd Learn Frames Rate To enable the Learn Frames Storm capability The user can use the drop down menu to select number of frames Default is No Limit The setting range is 1k 1024k per second Broadcast R...

Страница 93: ...7940C WS supports a switch to turn on or off the SNMP agent If you set the field SNMP to Enable the SNMP agent will be started up If the field SNMP is set to Disable the SNMP agent will be de activate...

Страница 94: ...5 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 function works independently Each...

Страница 95: ...t 10 100 1000BaseT TX WebSmart Switch Publication date June 2011 Revision 1 0 85 4 3 Monitoring There are six functions contained in the monitoring function Monitoring Detailed Statistics LACP Status...

Страница 96: ...rt Parameter description Rx Packets The counting number of the packets received RX Octets Total received bytes Rx High Priority Packets Number of Rx packets classified as high priority Rx Low Priority...

Страница 97: ...packets Tx Error Packets Shows the counting number of the received error packets Rx 64 Bytes Number of 64 byte frames in good and bad packets received Rx 65 127 Bytes Number of 65 126 byte frames in g...

Страница 98: ...nd CRC error packets received Rx Undersize Number of short frames 64 Bytes with valid CRC Rx Oversize Number of long frames according to max_length register with valid CRC Rx Fragments Number of short...

Страница 99: ...s Fig 4 30 illustrates that the LACP Status window can show LACP information and status for all ports at the same time Fig 4 30 LACP Status Parameter description LACP Aggregation Overview Shows the gr...

Страница 100: ...riority setting and bridge ID which stands for the MAC address of this switch Hello Time Shows the current hello time of the root bridge Hello time is a time interval specified by root bridge used to...

Страница 101: ...cast group Querier Shows the group membership queries status Queries transmitted A count of the group membership queries transmitted Queries received A count of the group membership queries received V...

Страница 102: ...gs It calculates the number of times a IGMPV2 report was issued V3 Reports When a host receives a group membership query it identifies the groups associated with the query and determines to which grou...

Страница 103: ...ation Fig 4 33 Ping Parameter description Ping Parameters Target IP address Set up a Target IP address to ping Count Use the drop down menu to set the number of echo requests to send There are four ch...

Страница 104: ...ision 1 0 94 Target IP address Shows the active target IP address Status Shows the result of the ping status Received replies Shows the received replies number of times Request timeouts Shows the time...

Страница 105: ...0BaseT TX WebSmart Switch Publication date June 2011 Revision 1 0 95 4 4 Maintenance There are five functions contained in the maintenance function Warm Restart Factory Default Maintenance Software Up...

Страница 106: ...r switch to reset the device and to retrieve default settings After upgrading software you have to reboot the device to have the new configuration take effect The function being discussed here is soft...

Страница 107: ...and replacing the current configuration Except for the IP address setting all settings will be restored to the factory default values when the Factory Default function is performed If you want to res...

Страница 108: ...itch Publication date June 2011 Revision 1 0 98 4 4 3 Software Upgrade Function name Software Upgrade Function description You can click the Browse button to retrieve the file you want to upgrade the...

Страница 109: ...Transfer Function name Configuration File Transfer Function description You can backup your switch s configuration file into your computer folder in case an accident happens In addition uploading the...

Страница 110: ...t permission If you do not logout and exit the browser the switch will automatically have you logged out Besides this manual logout and implicit logout you can set up the parameter of the Auto Logout...

Страница 111: ...something wrong Please verify the network configuration on Computer C 2 The uplink connection function fails to work The connection ports on another must be connection ports Please check if connectio...

Страница 112: ...arrier based backpressure for half duplex ports Any ports can be in disable mode force mode or auto polling mode Supports Head of Line HOL blocking prevention Supports broadcast storm filtering Web ba...

Страница 113: ...C or BiDi SC transceiver Transmission Mode 10 100 Mbps supports full or half duplex 1000 Mbps supports full duplex only Transmission Speed 10 100 1000 Mbps for TP 1000 Mbps for Fiber Full Forwarding F...

Страница 114: ...iation support on 10 100Base TX ports web browser can set transmission speed 10 100 Mbps and operation mode Full Half duplex on each port enable disable any port set VLAN group set Trunk Connection VL...

Страница 115: ...ENTIFIER enterprises 5205 switch OBJECT IDENTIFIER privatetech 2 gesmsw24LProductId OBJECT IDENTIFIER switch 7 gesmsw24LProduces OBJECT IDENTIFIER gesmsw24LProductId 1 gesmsw24LIllegalLogin TRAP TYPE...

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