Cat 6 Cable speed limited to 100Mbps

belictony

Disciple
I have 2 Deco M4s. One in ground floor and another in first floor. I have ran Cat 6 cable (25 meters in total length) between the 2.

However the speed is limited to 92-93 Mbps and I am not sure what to do. Both the Deco's have gigabit ethernet and cat 6 specs says it supports Gigabit ethernet. I am not sure if the length of the cable is causing issue. Any thoughts on this?

the text on the cable says below:
D-Link 4 PR 23 AWG 75C ANSI/TIA-568.C.2 CAT-6 UTP
 

vishalrao

Global Moral Police
Skilled
Probably bad crimping?
100 metres is the max length for cat6 IINM...

I recently had cat6 wiring done and the electrician guy messed up the crimping initially.
 

belictony

Disciple
How and where did you check this?
Using Wi-Fi. Expected speed in Wi-Fi is 250mbps.
Check your ethernet cable with a cable tester, all the 8 wires are needed for gigabit ethernet.
Don’t have cable tester. Don’t want to buy one just for 1 test.
Probably bad crimping?
100 metres is the max length for cat6 IINM...

I recently had cat6 wiring done and the electrician guy messed up the crimping initially.
Is there any good Website that shows the position for crimping?
 

belictony

Disciple
But how did you test? By transferring a file or using an app? What was the methodology of testing the speed?
Speedtest.net app was used. i selected the ISP server in the app and ran the test.

I performed some more troubleshooting below: Connected the cat 6 cable to my desktop which supports gigabit ethernet and the speed negotiation still shows 100mbps. Likely to be an issue with the cable or crimping.

I already have a crimping tool and new ethernet crystal heads. But havent done crimping before and dont know which website provides the correct mapping or postioning of the color lines.

Any thoughts or links to articles are welcome
 

gourav

Adept
Speedtest.net app was used. i selected the ISP server in the app and ran the test.

I performed some more troubleshooting below: Connected the cat 6 cable to my desktop which supports gigabit ethernet and the speed negotiation still shows 100mbps. Likely to be an issue with the cable or crimping.

I already have a crimping tool and new ethernet crystal heads. But havent done crimping before and dont know which website provides the correct mapping or postioning of the color lines.

Any thoughts or links to articles are welcome
Speedtest.net checks your Internet speed, not the speed between your routers and/or different PCs. Your internet speed is 100 mbps.
 

superczar

Skilled
I have 2 Deco M4s. One in ground floor and another in first floor. I have ran Cat 6 cable (25 meters in total length) between the 2.

However the speed is limited to 92-93 Mbps and I am not sure what to do. Both the Deco's have gigabit ethernet and cat 6 specs says it supports Gigabit ethernet. I am not sure if the length of the cable is causing issue. Any thoughts on this?

the text on the cable says below:
D-Link 4 PR 23 AWG 75C ANSI/TIA-568.C.2 CAT-6 UTP
Bad crimp.
Negotiated rate is 100mbps
 
I have 2 Deco M4s. One in ground floor and another in first floor. I have ran Cat 6 cable (25 meters in total length) between the 2.

However the speed is limited to 92-93 Mbps and I am not sure what to do. Both the Deco's have gigabit ethernet and cat 6 specs says it supports Gigabit ethernet. I am not sure if the length of the cable is causing issue. Any thoughts on this?

the text on the cable says below:
D-Link 4 PR 23 AWG 75C ANSI/TIA-568.C.2 CAT-6 UTP
Is this speed on wifi or over Ethernet cable or Lan cable.?
 

belictony

Disciple
Is this speed on wifi or over Ethernet cable or Lan cable.?
Checked with Wi-Fi and lan. Speeds are same I.e restricted to 100mbps
should I use the cross over cable pattern or straight thru cable?
Bad crimp.
Negotiated rate is 100mbps
I redid the crimp using t568B standard on both ends of the cable and no changes noted in speed.
 

gwrench2000

Disciple
It should not matter wither you use straight thru or cross-cable since your gigabit routers support auto-negotiation. 25m is also well within the permissible distance. First check that you have good continuity in the 8-wires, all 8 are required for gigabit speed. If that is good then check for possible sources of interference, like CAT 6 which is laid in same conduit or immediately parallel to electrical wires, running in close proximity of cordless-phone, a/c, microwave etc..
 
good continuity in the 8-wires, all 8 are required for gigabit speed. If that is good then check for possible sources of interference, like CAT 6 which is laid in same conduit or immediately parallel to electrical wires, running in close proximity of cordless-phone, a/c, microwave etc.
Doesn't Cat6 has good insulation compared to previous generations? Interference shouldn't be that much of an issue.
@belictony how much were the network speeds when the connection was setup the first time.
 

belictony

Disciple
It should not matter wither you use straight thru or cross-cable since your gigabit routers support auto-negotiation. 25m is also well within the permissible distance. First check that you have good continuity in the 8-wires, all 8 are required for gigabit speed. If that is good then check for possible sources of interference, like CAT 6 which is laid in same conduit or immediately parallel to electrical wires, running in close proximity of cordless-phone, a/c, microwave etc..
How do I check continuity? cable tester is required?. I dont intend to buy a cable tester. Any other way to test the continuity?

I dont think interference is the issue as there are no nearby electrical wires.
 
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