Gigabit A6847-60101

[Amiel Tutolo]

I have a machine that just arrived. It has 2 add on NIC's. One is a 10/100Base-T and the other is an A6847-60101. I have the 10/100 configured just fine but when I configure the GB card the networking seems to hang on the other card. They are on the same network. I am doing this remotely so I cannot see the physical layout or get to the switch this goes to. Any troubleshooting tips/help would be great.

[Patrick Wallek]

Haveing 2 LAN cards on the same network is not supported by HP. You should have the 2 cards on different networks. If you do that I bet you will have better results.

[Jeff Schussele]

Hi Amiel,

That GB card is a fibre gigabit card.
Do you have the igelan driver in the kernel?
Have the Rcv & Xmit lines on the fiber been verified. There's a known issue with this card IF the Xmit side is bad - although it causes system performance issues.
Finally, it's NEVER recommended to have 2 NICs in the same subnet. Causes all kinds of squirrely routing problems & I don't even want to think what new issues would be raised by having a Base-T AND Fibre Gig on the same subnet.
One of those NICs needs to move to another subnet before troubleshooting can commence - I suspect HP will sat the same.

My $0.02,
Jeff

[doug mielke]

Both on same network is a proble.
You could try turning off the one or the other card temporarily without too much trouble while confirming nic functions with

ifconfig lanX 0.0.0.0


where X is lan card number

[rick jones · Accepted solution]

When multiple physical (as far as the transport is concerned) NICs are configured into the same IP subnet, traffic can be recevied on each NIC, but traffic will be sent out only one of them.

If both NICs do not have equal connectivity to the rest of the network, this will result in connectivity problems on the host.

When the links are of the same type (and have equal connectivity), one can bind them together wtih Auto Port Aggregation - this makes them look like one NIC to the transport and APA deals with fail-over.

If the links are of different type and/or different connectivity, you either want to find a way to have each in a different IP subnet, or start adding explicit static routes to point destinations at each of the interfaces, or set ip_strong_es_model to one - which will cause outbound route selection to include source IP address and so traffic that came-in on interface A to IP A will have replies go back out interface A.

[Brian Hackley]

Hi,

FWY you can also look at the GB cards to see their status and statistics:

lanadmin -x card_info ppa
lanadmin -x stats drv ppa

ppa == lan#

HTH,

Brian Hackley