Cross or JR-45

Answered Question
Mar 31st, 2008
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I connected from router 1811 (FE1) to my Switch 2950 (First port on 24 ports Switch). I am using RJ-45 cable. Should I use crossover cable or I am fine. Thanks,

Correct Answer by Istvan_Rabai about 8 years 11 months ago

Hi Hoa,


Between a router and a switch you should use a straight-through cable.


RJ-45 does not imply the cable is straight-through. It just tells you the connector type.


Cables with RJ-45 connectors can be either crossover or straight-through.


Check the connection between the router and the switch: give an ip address to interface vlan 1 on the 2950 switch from the same subnet where FE1 of the router is located.


Put the FE interface of the 2950 switch into vlan 1 and ping interface vlan 1 from the router.


If it works, then you have the right cable.


Cheers:

Istvan


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Correct Answer
Istvan_Rabai Mon, 03/31/2008 - 10:21
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  • Gold, 750 points or more

Hi Hoa,


Between a router and a switch you should use a straight-through cable.


RJ-45 does not imply the cable is straight-through. It just tells you the connector type.


Cables with RJ-45 connectors can be either crossover or straight-through.


Check the connection between the router and the switch: give an ip address to interface vlan 1 on the 2950 switch from the same subnet where FE1 of the router is located.


Put the FE interface of the 2950 switch into vlan 1 and ping interface vlan 1 from the router.


If it works, then you have the right cable.


Cheers:

Istvan


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