I have seen this with pc's which had problems supporting the pci bridge on the network cards, usually older/cheaper pc's.
I don't remember the name of the Adaptec card I dug out of the rubbish bin, but it looks like this in my old home firewalls. ppb1 at pci1 dev 0 function 0 "DEC 21154 PCI-PCI" rev 0x02 pci2 at ppb1 bus 2 sf0 at pci2 dev 4 function 0 "Adaptec AIC-6915" rev 0x03: irq 11 address 00:00:d1:ee:0d:35 sqphy0 at sf0 phy 1: Seeq 80220 10/100 PHY, rev. 1 sf1 at pci2 dev 5 function 0 "Adaptec AIC-6915" rev 0x03: irq 10 address 00:00:d1:ee:0d:36 sqphy1 at sf1 phy 1: Seeq 80220 10/100 PHY, rev. 1 sf2 at pci2 dev 6 function 0 "Adaptec AIC-6915" rev 0x03: irq 9 address 00:00:d1:ee:0d:37 sqphy2 at sf2 phy 1: Seeq 80220 10/100 PHY, rev. 1 sf3 at pci2 dev 7 function 0 "Adaptec AIC-6915" rev 0x03: irq 9 address 00:00:d1:ee:0d:38 sqphy3 at sf3 phy 1: Seeq 80220 10/100 PHY, rev. 1 ppb2 at pci1 dev 1 function 0 "DEC 21154 PCI-PCI" rev 0x02 pci3 at ppb2 bus 3 sf4 at pci3 dev 4 function 0 "Adaptec AIC-6915" rev 0x03: irq 9 address 00:00:d1:ee:11:2d sqphy4 at sf4 phy 1: Seeq 80220 10/100 PHY, rev. 1 sf5 at pci3 dev 5 function 0 "Adaptec AIC-6915" rev 0x03: irq 11 address 00:00:d1:ee:11:2e sqphy5 at sf5 phy 1: Seeq 80220 10/100 PHY, rev. 1 sf6 at pci3 dev 6 function 0 "Adaptec AIC-6915" rev 0x03: irq 10 address 00:00:d1:ee:11:2f sqphy6 at sf6 phy 1: Seeq 80220 10/100 PHY, rev. 1 sf7 at pci3 dev 7 function 0 "Adaptec AIC-6915" rev 0x03: irq 9 address 00:00:d1:ee:11:30 sqphy7 at sf7 phy 1: Seeq 80220 10/100 PHY, rev. 1 /Tony
