dhcpcd-discuss

On Tue, Jun 30, 2020 at 11:41:03AM +0100, Roy Marples wrote:
> dhcpcd -n will normally send SIGHUP to the process specified in /var/run/dhcpcd/pid
>
> Just to be clear, SIGHUP does not mean restart, it means reload config and
> rebind - so any current DHCP/RA/DHCPv6 is kept, it's just refreshed outside
> the normal timers.
>
> If I understand jails correctly, each jailed instance has it's own /var/run?
> If so, I don't understand what issue you're seeing unless the jailed
> interface also exists in the host? If so, what's the output of ifconfig so
> we can try to exclude them?
>
> Roy
>

I had to check as what you say is true even on the machine that acts
weird. So, I found out what's going on, and why it seamed like jail
dhcpcd was reloaded. I have lagg0 interface on which dhcpcd is running.
Members of that lagg0 are em0 and wlan0. The requirement is that only
lagg0 has dhcp client, but when I run dhcpcd -n, all three have the same
IP: em0, wlan0 and lagg0. I guess that's too confusing for FreeBSD. :o)

The output of ifconfig em0 / wlan0 / lagg0:

em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=88<VLAN_MTU,VLAN_HWCSUM>
	ether f0:de:f1:64:c2:2a
	inet6 fe80::f2de:f1ff:fe64:c22a%em0 prefixlen 64 scopeid 0x1
	inet6 fe80::2c95:4993:93d8:18e8%em0 prefixlen 64 scopeid 0x1
	inet 192.168.111.14 netmask 0xffffff00 broadcast 192.168.111.255
	media: Ethernet autoselect (1000baseT <full-duplex>)
	status: active
	nd6 options=1<PERFORMNUD>

wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	ether f0:de:f1:64:c2:2a
	hwaddr a0:88:b4:4e:b4:f4
	inet6 fe80::f2de:f1ff:fe64:c22a%wlan0 prefixlen 64 scopeid 0x3
	inet6 fe80::ec58:dcd9:e70f:383e%wlan0 prefixlen 64 scopeid 0x3
	inet 192.168.111.14 netmask 0xffffff00 broadcast 192.168.111.255
	groups: wlan
	ssid xxx channel 5 (2432 MHz 11g ht/20) bssid 04:f0:21:1b:b5:f2
	regdomain FCC country US authmode WPA2/802.11i privacy ON
	deftxkey UNDEF AES-CCM 2:128-bit txpower 30 bmiss 10 scanvalid 60
	protmode CTS ampdulimit 64k ampdudensity 8 -amsdutx amsdurx shortgi
	-stbc -ldpc wme roaming MANUAL
	media: IEEE 802.11 Wireless Ethernet MCS mode 11ng
	status: associated
	nd6 options=1<PERFORMNUD>

lagg0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	ether f0:de:f1:64:c2:2a
	inet6 fe80::f2de:f1ff:fe64:c22a%lagg0 prefixlen 64 scopeid 0x4
	inet 192.168.111.14 netmask 0xffffff00 broadcast 192.168.111.255
	laggproto failover lagghash l2,l3,l4
	laggport: em0 flags=5<MASTER,ACTIVE>
	laggport: wlan0 flags=0<>
	groups: lagg
	media: Ethernet autoselect
	status: active
	nd6 options=1<PERFORMNUD>

The whole network setup on that machine is described under the "Laptop" section:
https://meka.rs/blog/2016/12/24/freebsd-wifi-and-ethernet-bridging-and-aggregation/
Just in case you need to replicate it.

Regards,
meka

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