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[chevelam]

Hi,

I have the H/W 'A' revision of this router with the latest firmware 1.37.   I have been using this route wirelessly for a long time without much issue.

However, recently, I tried to use more wired LAN ports on the unit.  I have found that if I make more than 1 wired port connections, only one of the wired port would connect at link speed of 1Gbps and the rest would be at 100 Mbps.   Is it normal?  I thought all the wired ports on DIR 655 are good for 1Gbps.

Please help to sort out this.    I can confirm that the cables are good and the NICs are set for 1Gbps.

Thanks,

[FurryNutz]

Link>Welcome!

• What Hardware version is your router? Look at sticker under router.
• What region are you located?
• Was a Factory Reset performed before and after any firmware updates then set up from scratch?
• Was the router working before any firmware updates?

Internet Service Provider and Modem Configurations

• What ISP Service do you have? Cable or DSL?
• What ISP Modem Mfr. and model # do you have?

All ports should be 1Gb regardless of connections. I presume all NICs and cables have been tested 1 at a time connected to the back of the router to check connection speed?

Any chance you have a external Gb network switch to test with?

What devices are connected to the back? Just PCs? Any other wired devices?

Ensure all of your wired devices are set for automatic obtain IP addressing.
Ensure that your NICs link speeds are set to Automatic. You can try manually setting 1000Mb to test. This might be good to see if you get any results...

[chevelam]

All ports should be 1Gb regardless of connections. I presume all NICs and cables have been tested 1 at a time connected to the back of the router to check connection speed?

Any chance you have a external Gb network switch to test with?

What devices are connected to the back? Just PCs? Any other wired devices?

Ensure all of your wired devices are set for automatic obtain IP addressing.
Ensure that your NICs link speeds are set to Automatic. You can try manually setting 1000Mb to test. This might be good to see if you get any results...

thanks for the quick reply.

Here is a bit more detail of the test/scenario...I was using a Gb network switch(by Net***).  The Gb network switch was configured with static 192.168.0.137 address.   I connected the ports between the Gb network switch to the LAN port on the DIR 655(it is on 192.168.0.1).  The WAN side of the DIR 655 is connecting to my ISP internet modem(running in bridge mode).    If I connect one port between the switch and DIR 655, the link speed light(on the switch) would indicate a 1Gb connection.   If I add a 2nd connection between the switch and DIR 655, then only 1 port shows 1Gbps and the remaining port show 100Mbps connection.   I have not checked all the back ports on the DIR655(only two of them) -- I will do that once I have a chance.

The CAT cables were "tested" by connecting a 1 Gb NIC adapter running on a windows machine to the DIR 655.  The windows Local Area Connection Status for the NIC shows connection speed of 1Gbps.

I believe the Gb switch is good.  The ports on the Gb switch have been tested to yield the expected connection speed regardless whether the ports are connected individually one at a time or multiple of them are being connected at the same time(to 1 Gb NICs on Windows O/S machines).

Note: Of the 4 ports on the DIR 655, one of them feeds into the WAN port of another wifi router(this router is on 192.168.2.x for "g" only service).   The DIR 655 is set for "n" only service.

Cheers

[FurryNutz]

DO this, remove the external GB switch and connect up all wired PCs to the back of the 655. Open the adapter connection properties for each NIC in windows and look at the connection status there, what do each report the connection speed as?

[chevelam]

DO this, remove the external GB switch and connect up all wired PCs to the back of the 655. Open the adapter connection properties for each NIC in windows and look at the connection status there, what do each report the connection speed as?

Thank for the suggestion.  Did the test as suggested and I was able to isolate the problem...well, as it turns out, the issue was caused by a bad cable -- not sure why I did not catch it in my initial round of testing     

cheers,

[FurryNutz]

Glad you found the problem.

Enjoy.