Hello!
We have a 2011UiAS router and a CRS125-24G-1S switch.
Communication does not increase by more than 100 Mb / s. The patch cord works 100% and is checked, the software is updated to 6.40.4, firmware 3.41.
If we put 1 Gb / s on hand, the status “no link”.
Any ideas?
Just some silly things to think of:
- You confirmed the cable works for a 1Gbps link and not just a 100Mbps link, because 1Gbps does use all 8 pins where a 100Mbps link only uses 4
- You’re using ether1 - ether5 on the 2011 (ports 6 - 10 are 10/100 only)
- There is nothing in the CRS’s configuration that disallows gigabit links
- Did you test each to some other known gigabit device independently?
Re: 1Gbps does use all 8 pins where a 100Mbps link only uses 4
Hmm, are your sure ?
I thought Ethernet (10 or 100 or 1-gig or 10-gig) only used 4 of the 8 wires in an Ethernet cable (a tx pair and a rx pair).
Where the other in-used 4 wires could be used as a second Ethernet cable (using a Y on both ends of a single 8-wire Ethernet cable), or the 4 in-used wires could be used for POE (2 wires for - and 2 wires for +).
North Idaho Tom Jones
He is right. Gigabit uses the four pairs of cable, and will not work correctly (if at all) with only two.
Well blow me down !!! I did not know that. Thank you for the post.
FYI - Of course I had to do some quick googling and reading to further confirm the need of 8 wires in a gig Ethernet cable. So now, I will need to research some to understand how POE works on gig Ethernet…
North Idaho Tom Jones
Thanks !
I did not know that ether6-10 is only 100Mbit / s