dual ethernet isn't dual

[flyshoo]

I'm having a problem networking dual ethernet interfaces. One interface works without issue but the second interface does not reply to arp requests or dhcp offers. I'm trying to isolate traffic on the second interface for iscsi, best practice for iscsi setups. Interface re1 is the working interface and it is on a separate subnet, 10.22.33.0/24. Interface re0 is not working and it is on a separate subnet, 10.22.35.0/24. I thought is was a routing issue so I connected all hosts to a switch but still no dice. Then I connected the switch to a router with dhcp enabled. I could see re0 requesting a dhcp address but it didn't bind to the dhcp address offer. My motherboard is a gigabyte h77n-wifi. I know the wifi will never work, I just wanted the dual ethernet interfaces.

Any suggestions would be appreciated.
Thanks,
Chris

 

[jgreco]

Do you know for a fact that re0 works? If you run "tcpdump" on re0, is it seeing the appropriate packets on 10.22.35.0/24? If you made all sorts of networking changes, have you tried a reboot?

 

[flyshoo]

I did reboot. I also moved the ethernet drop from the working interface to the failing interface, same behavior. I guess the board has a bad ethernet port. Thanks for responding so quickly. Good to know Freenas has tcpdump too.

Thanks, I will try tcpdump and let you know.

 

[flyshoo]

I ran tcpdump -i re0 -vv. No traffic at all. Oh well I will have to create an RMA. Before I do that I will check for a bios update.

thanks for your help jgreco
Chris

 

[nokeabue]

bios update will be fine probably for supporting better gigalan compatibility perhaps.
remember always that if cables are noisy you'll need to setup manually to Base-10T or halfduplex using some ethtool not always
autodetect runs flawless.
otherwise set both drivers to the most slow connection T10-halfduplex and go on. good luck

 

[gpsguy]

I consider this bad advice.

One needs to find out what the problem is and resolve it. Connecting to a FreeNAS server via a 10 Mbit/s half duplex connection will result in terrible performance.

otherwise set both drivers to the most slow connection T10-halfduplex and go on.

 

[flyshoo]

Both ends have link lights but no traffic. I'm not sure how to change the link speed in Freenas. The switch is a dumb netgear gigabit switch.

 

[anika200]

Both ends have link lights but no traffic. I'm not sure how to change the link speed in Freenas. The switch is a dumb netgear gigabit switch.

Was there a switch involved in all your testing? I am not an expert but I actually have had a switch go bad displaying similar bizarre symptoms.

 

[flyshoo]

I change the switch with a know good one. Same issue. Can I use insmod or modprobe.

 

[flyshoo]

Issue resolve after running a bootable Ubuntu usb drive. Don't know why but all is good.