I have two NICs in a machine which acts as a gateway, and with the upgrade from
11-STABLE to the latest 12.0-STABLE tree (r346473), neither em(4) based NIC
will maintain a connection.
The behavior is similar to what is described in the last couple comments of
this ticket: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219428
The behavior is identical with both devices. Link is established, dhclient
starts securing a DHCP lease, and then once traffic starts to flow, the link
switches to DOWN. Then back to UP, and back and forth.
A syslog snippet:
Apr 21 20:03:42 strawberry kernel: em0: Link is up 100 Mbps Full Duplex
Apr 21 20:03:42 strawberry kernel: em0: link state changed to UP
Apr 21 20:03:46 strawberry dhclient[15534]: New IP Address (em0):
173.228.83.96
Apr 21 20:03:46 strawberry dhclient[16069]: New Subnet Mask (em0):
255.255.255.0
Apr 21 20:03:46 strawberry dhclient[18914]: New Broadcast Address (em0):
173.228.83.255
Apr 21 20:03:46 strawberry dhclient[21483]: New Routers (em0): 173.228.83.1
Apr 21 20:03:48 strawberry kernel: em0: link state changed to DOWN
Apr 21 20:03:50 strawberry kernel: em0: Link is up 100 Mbps Full Duplex
Apr 21 20:03:50 strawberry kernel: em0: link state changed to UP
Apr 21 20:03:57 strawberry kernel: em0: link state changed to DOWN
Apr 21 20:03:57 strawberry ntpd[75785]: error resolving pool
0.freebsd.pool.ntp.org: Name does not resolve (8)
Apr 21 20:03:58 strawberry dhclient[38043]: send_packet: Network is down
Apr 21 20:03:59 strawberry kernel: em0: Link is up 100 Mbps Full Duplex
Apr 21 20:03:59 strawberry kernel: em0: link state changed to UP
Apr 21 20:04:05 strawberry kernel: em0: link state changed to DOWN
Apr 21 20:04:06 strawberry dhclient[38043]: send_packet: Network is down
Apr 21 20:04:07 strawberry kernel: em0: Link is up 100 Mbps Full Duplex
Apr 21 20:04:07 strawberry kernel: em0: link state changed to UP
Apr 21 20:04:15 strawberry kernel: em0: link state changed to DOWN
Apr 21 20:04:15 strawberry dhclient[38043]: send_packet: Network is down
Apr 21 20:04:16 strawberry kernel: em0: Link is up 100 Mbps Full Duplex
THe version/hardware details:
FreeBSD strawberry 12.0-STABLE FreeBSD 12.0-STABLE r346473 GENERIC amd64
em0 at pci0:7:0:0: class=0x020000 card=0xa01f8086 chip=0x10d38086 rev=0x00
hdr=0x00
vendor = 'Intel Corporation'
device = '82574L Gigabit Network Connection'
class = network
subclass = ethernet
em1 at pci0:8:0:0: class=0x020000 card=0xa01f8086 chip=0x10d38086 rev=0x00
hdr=0x00
vendor = 'Intel Corporation'
device = '82574L Gigabit Network Connection'
class = network
subclass = ethernet
My temporary workaround has been to use a USB-based NIC, but I am wondering if
there are any tunables I could tweak to get this misbehaving driver to mind its
manners?
Cheers
--
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