On Tue, 2022-11-15 at 16:42 -0800, David Christensen wrote: > On 11/15/22 07:15, hw wrote: > > On Tue, 2022-11-15 at 12:38 +0100, hw wrote: > > > On Mon, 2022-11-14 at 13:21 +0100, hw wrote: > > > > On Mon, 2022-11-14 at 12:28 +0100, stefano gozzi wrote: > > > > > Please loot at this: > > > > > https://www.linuxquestions.org/questions/linux-networking-3/intel-x540-t2-network-card-installed-but-only-at-100mbit-cant-change-or-improve-4175686736/ > > > > > > > > > > It seems that you need a 8x pcie slot to work fine > > > > > > > > Thanks, the card is in an 8x slot and has been working fine with > > > > Fedora. I > > > > didn't change anything but using Debian instead of Fedora. > > > > > > Ok I pulled the server from the rack and put another fan to blow directly > > > on > > > the > > > card in case it might overheat. > > > > > > And I have to correct myself. The card is in an 8x slot and according to > > > the > > > manual of the mainboard it's supposed to be 8x and not 4x. I pulled it > > > and > > > put > > > it back in. > > > > > > However, lspci says "LnkSta: Speed 5GT/s (ok), Width x4 (downgraded)". > > > > > > Usually cards in PCI slots with 4 instead of 8 lanes still work fine, and > > > the > > > card did work in that slot with Fedora. > > > > > > I found that I had to unplug the network cable and to plug it back in > > > before I > > > could send/receive pings. I already tried a different network cable and > > > it > > > didn't make a difference. > > > > > > I suspect that Debian might be doing something differently or not doing > > > that > > > Fedora does which causes the intermittent connections. > > > > > > Any ideas? Backups over an 1GB link are excruciatingly slow ... > > > > > > > Update: I booted a Fedora live system and the connection is also > > intermittent. > > So it's not a Debian issue. It's still an issue, though ... > > > What is the cable type? Length? Factory or home made?
I got a new cable today which is rated as cat 8.1. It's only 1.5 meters long. I have tried 3 different cables now, two of them about 1.5 and another 10 meters long. Before I got the new cable, I tried the other port on the nic, and it made no difference. Even with the new cable, the connection is intermittent :( > What is connected to the other end of the cable? If it is a NIC in > another server, what happens if you swap the two NIC's? It's connected to a Broadcom NetXtreme II BCM57810 in another server. The other server has an identical mainboard and CPU in it, and the other port on the Broadcom is connected to a client with the same card, and that connection works fine. So I'm assuming that the Broadcom card is ok. I'm about to move the client into a new case in a couple days and then I might swap the Broadcom from the client into the backup server. Maybe I can reseat the heat sink on the card with new thermal paste. Overheating might explain why the connection is intermittent.
