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Gigabit Switch

May 8th, 2010

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Will my 10/100 router slow down my gigabit switch?

If i put my gigabit switch inside the router, I understand that the internet will always be slower, but if I transfer files between two computers capable of gigabit ethernet attached to my gigabit switch, will the fact that my 10/100 router is attached to the switch also slow down the transfer between the gigabet computers?

Simple answer is no. Routers work on layer 3 and also have a WAN side and LAN side. On your LAN side, which is your LAN switch (in your case it is the Gigabit LAN switch) you are probably running NATed IP addresses from DHCP server. It could be the router that's performing the DHCP server or another computer that's doing it. The router will NAT IP addresses that are local to the external IP address that's been assigned to you by your ISP.

Communications between local IP address ranges (layer 3), i.e. 192.160.x.x, will not pass through or even reach the router's LAN port as there is ARP protocol to find the MAC addresses (layer 2) within the LAN. This is done by first send out broadcast messages within the LAN side and then resolving which local IP address belongs with which MAC address. This is why if your make changes to your NATed IP address or change LAN ports there is a long time before things get through. When this happens, you should reset the LAN switch to force an ARP and also force the LAN switch to forget the MAC address spanning tree tables so that it is in broadcast mode.

So in summary, computers with GigE NIC attached to GigE switch will hum at rates faster than 100 Mbps. It will never reach anywhere near 1 Gbps unless all the computer on the LAN are using jumbo packets. Maybe as fast as 200 or 300 Mbps. There is also a latency turn around for each packet on the computers. Packets from computer that are destined to WAN, i.e. directed to the router will work at the rate of the external WAN link to your ISP, which will more than likely be a few megabits/sec.

Find Gigabit Switch On eBay Below:

 3Com SuperStack  5500G EI  48 Port Gigabit Ethernet Switch  NO PSU
3Com SuperStack 5500G EI 48 Port Gigabit Ethernet Switch NO PSU
$28.99
Ubiquiti Networks EdgeSwitch 24 250W ES 24 250W Managed PoE+ Gigabit Switch
Ubiquiti Networks EdgeSwitch 24 250W ES 24 250W Managed PoE+ Gigabit Switch
$523.46
NEW TP LINK T1500G 10PS JetStream 8 Port Gigabit Smart PoE Switch with 2 SFP
NEW TP LINK T1500G 10PS JetStream 8 Port Gigabit Smart PoE Switch with 2 SFP
$137.32
NEW TP LINK T1500 28PCT 24 Port 10 100Mbps + 4 Port Gigabit Smart PoE+ Switch
NEW TP LINK T1500 28PCT 24 Port 10 100Mbps + 4 Port Gigabit Smart PoE+ Switch
$297.98
Allworx PowerFlex P2426 20 Port PoE Gigabit Switch Rack mounts Power Cord
Allworx PowerFlex P2426 20 Port PoE Gigabit Switch Rack mounts Power Cord
$220.00
TRENDnet TEG 082WS 8 Port Gigabit Web Smart Switch Version v10R
TRENDnet TEG 082WS 8 Port Gigabit Web Smart Switch Version v10R
$115.49
Zyxel 5 Port Gigabit Easy Web Managed Plus Switch Sturdy Metal QoS WebGUI Ju
Zyxel 5 Port Gigabit Easy Web Managed Plus Switch Sturdy Metal QoS WebGUI Ju
$36.04
New Brocade FCX648 E ADV Managed L3 Switch with 48x Gigabit Ports
New Brocade FCX648 E ADV Managed L3 Switch with 48x Gigabit Ports
$245.00
NETGEAR GS728TP 100NAS ProSAFE 24 port Gigabit Smart Switch
NETGEAR GS728TP 100NAS ProSAFE 24 port Gigabit Smart Switch
$442.28
New Sealed NetGear GS108v4 Prosafe 8 port Gigabit Desktop Switch 2 available
New Sealed NetGear GS108v4 Prosafe 8 port Gigabit Desktop Switch 2 available
$45.00
PowerDsine 6506 6 Port Gigabit PoE Midspan Ethernet Switch Tested
PowerDsine 6506 6 Port Gigabit PoE Midspan Ethernet Switch Tested
$6.93
D Link DGS 1005D gigabit switch
D Link DGS 1005D gigabit switch
$5.00
Cisco SG100 24 24 Port Gigabit Switch with 2 Combo Mini GBIC Ports HSS
Cisco SG100 24 24 Port Gigabit Switch with 2 Combo Mini GBIC Ports HSS
$19.89
Cisco Catalyst WS X6148 GE TX 48 Port Gigabit Ethernet Switch Module
Cisco Catalyst WS X6148 GE TX 48 Port Gigabit Ethernet Switch Module
$27.99
Netgear 5 port Gigabit Ethernet Switch Model GS105
Netgear 5 port Gigabit Ethernet Switch Model GS105
$6.50
NEW OPEN BOX CISCO SG500 28P K9 28 port Gigabit POE Stackable Managed Switch
NEW OPEN BOX CISCO SG500 28P K9 28 port Gigabit POE Stackable Managed Switch
$940.00
D Link 5 Port Gigabit Switch DGS 1005G
D Link 5 Port Gigabit Switch DGS 1005G
$10.00
Buffalo Americas BS GU2008 BUFFALO 8 Port Desktop Gigabit Green Ethernet Switch
Buffalo Americas BS GU2008 BUFFALO 8 Port Desktop Gigabit Green Ethernet Switch
$55.55
Cisco WS C4948 S 48 Port Layer 3 Gigabit Managed Switch w AC Power Supply
Cisco WS C4948 S 48 Port Layer 3 Gigabit Managed Switch w AC Power Supply
$128.61
TRENDnet TEG S24Dg Gigabit Switch 24 ports
TRENDnet TEG S24Dg Gigabit Switch 24 ports
$39.00
Cisco SG102 24 Compact Unmanaged 24 Port Gigabit Switch TESTED Good Condition
Cisco SG102 24 Compact Unmanaged 24 Port Gigabit Switch TESTED Good Condition
$39.99
Cisco 2970 Series 24 Port Gigabit Switch WS C2970G 24TS E Lifetime Warranty
Cisco 2970 Series 24 Port Gigabit Switch WS C2970G 24TS E Lifetime Warranty
$164.99
Linksys 8 Port Metallic Gigabit Switch SE3008
Linksys 8 Port Metallic Gigabit Switch SE3008
$40.35
D Link DGS 1510 20 Managed L3 Gigabit Ethernet 10 100 1000 Network Switch
D Link DGS 1510 20 Managed L3 Gigabit Ethernet 10 100 1000 Network Switch
$308.43
Netgear ProSafe JGS524 v2 24 Port Gigabit Ethernet Switch w Rack Ears
Netgear ProSafe JGS524 v2 24 Port Gigabit Ethernet Switch w Rack Ears
$39.00
TENDA 8 Port Gigabit Ethernet Switch G1008D
TENDA 8 Port Gigabit Ethernet Switch G1008D
$10.00
New In Box NetGear ProSafe GS716T V2H2 1SPT Gigabit Smart Switch
New In Box NetGear ProSafe GS716T V2H2 1SPT Gigabit Smart Switch
$89.95
HP ProCurve 2510G 24 24 Port Managed Gigabit Switch W 4 SFP Ports HP J9279A
HP ProCurve 2510G 24 24 Port Managed Gigabit Switch W 4 SFP Ports HP J9279A
$180.00
IBM Blade 32R1869 Layer 2 3 Copper Gigabit Ethernet Switch Module
IBM Blade 32R1869 Layer 2 3 Copper Gigabit Ethernet Switch Module
$75.00
NETGEAR 5Port Gigabit Ethernet 10 100 1000Mbps Switch GS205 New
NETGEAR 5Port Gigabit Ethernet 10 100 1000Mbps Switch GS205 New
$18.36
Cisco WS C3750G 24T S 24 Port Managed Gigabit Ethernet Switch  Flow Control
Cisco WS C3750G 24T S 24 Port Managed Gigabit Ethernet Switch Flow Control
$41.00
CISCO SG100D 05 5 PORT GIGABIT DESKTOP SWITCH
CISCO SG100D 05 5 PORT GIGABIT DESKTOP SWITCH
$15.29
Intellinet 560917 Intellinet 24 Port Web Managed Gigabit Ethernet Switch with 2
Intellinet 560917 Intellinet 24 Port Web Managed Gigabit Ethernet Switch with 2
$194.20
Intellinet 560993 Intellinet 16 Port Gigabit Ethernet PoE+ Switch 16 Ports 1
Intellinet 560993 Intellinet 16 Port Gigabit Ethernet PoE+ Switch 16 Ports 1
$331.35
ADTRAN NetVanta 1524ST 1200560L2 24 Port Gigabit Switch 4X GBIX Ports Warranty
ADTRAN NetVanta 1524ST 1200560L2 24 Port Gigabit Switch 4X GBIX Ports Warranty
$152.99
Cisco Linksys SRW2048 48 port 10 100 1000 Gigabit switch with WebView 1000mbps
Cisco Linksys SRW2048 48 port 10 100 1000 Gigabit switch with WebView 1000mbps
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NETGEAR 5 Port Gigabit Ethernet Unmanaged Switch Sturdy Metal Desktop Plug an
NETGEAR 5 Port Gigabit Ethernet Unmanaged Switch Sturdy Metal Desktop Plug an
$41.97
Extreme Networks X350 48t 48 Port 1Gb Ethernet Switch Layer 2 L2 16202 Gigabit
Extreme Networks X350 48t 48 Port 1Gb Ethernet Switch Layer 2 L2 16202 Gigabit
$151.93
Cisco WS C3560X 48P S 48 Port Gigabit Switch Complete with AC Power and NM 1G
Cisco WS C3560X 48P S 48 Port Gigabit Switch Complete with AC Power and NM 1G
$195.00

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