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1Gbps devices running at 100Mbps

Hi
I have installed several cat6 Ethernet cables around our office, nothing exceeding or anywhere near 20m
The devices, which are all 1Gbps capable, refuse to connect beyond 100Mbps
Could it be my RJ45 connectors or sockets that are of poor quality ?
thanks
yann

Tom Cieslik

Cat 6 or Cat 5e should be able to connect using 1GB speed. I have Cat5e in my whole company and all devices are connecting using 1Gbps speed
Make sure your switch is 1GB Ethernet and is not forcing 100Mbps connection

Lee W, MVP

Things it could be off the top of my head?
1. You used the wrong wire config so the gigabit pairs aren't being used.
2. You have everything set to a specific speed in the NIC properties so it doesn't negotiate at a higher speed.
3. You're using a 100 Mbit switch/hub (perhaps one with MOSTLY 100 Mb ports but a couple of Gigabit Uplink and you're misreading?)

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John

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David Favor

You can check #2 above via this command.

net10 # ethtool rename4 
Settings for rename4:
	Supported ports: [ TP ]
	Supported link modes:   1000baseT/Full 
	                        10000baseT/Full 
	Supported pause frame use: Symmetric
	Supports auto-negotiation: Yes
	Supported FEC modes: Not reported
	Advertised link modes:  1000baseT/Full 
	                        10000baseT/Full 
	Advertised pause frame use: Symmetric
	Advertised auto-negotiation: Yes
	Advertised FEC modes: Not reported
	Speed: 10000Mb/s
	Duplex: Full
	Port: Twisted Pair
	PHYAD: 0
	Transceiver: internal
	Auto-negotiation: on
	MDI-X: Unknown
	Supports Wake-on: umbg
	Wake-on: g
	Current message level: 0x00000007 (7)
			       drv probe link
	Link detected: yes

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Verify your interfaces supports 1G + is running with Auto Negotiation == on + Duplex == full.

Be sure to verify settings of each device (computers, routers, switches) which create your entire connection chain.

John

Thanks and I was glad to assist you .