I am planning to get 2.5Gbit internet and want to dabble in network stuff so I bought this router. I only have 100Mbit now but plan to upgrade it.
Internet comes into my apartment via an ethernet cable. No modems or anything like that that I can access.
I used the 2.5Gbit port as WAN and it is stuck in a link up - link down cycle every few seconds.
I’ve set up eth8 as WAN and it works fine. The same WAN cable also works fine with my old router.
The 2.5G port also connects fine as a WAN port if I plug a cable into the old router as the “source”. So I only experience the link down with the ISP’s cable (again, the cable works in other ports and another router):
I though something was broken with the port, but it does connect and get an address from another router, just not the ISP’s cable. The ISP’s cable works fine, so probably not that either. I am so confused.
Is this evidence of some incompatibility between the 2.5G port and ISP’s hardware? Should I just return the thing while I still can?
disable advertising 2.5GB capabilities or set the speed of an interface manually to 100Mb or 1Gb to see if it makes any difference.
Switch off autonegotation or flowcontrol.
Hi, thanks for the reply. As I mentioned in the original post, I have already tried that. Well, except flow control. Checked it - it’s already been off all this time.
Check cable. Use on which you are sure is at least CAT5E (CAT6 when going higher then 1Gbps).
Even if the current cable qualifies or better, do check with another one.
I have no way to check with another cable, it comes from outside the apartment. Besides, it works with another port and with the old router.
I took the router to another location which has 1G connection and it connected with no issues on the 2.5G port (at 1G). So, I assume that the port is fine, after all.
I will try a dumb switch out eventually, thanks for the idea.
