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Re: strange DHCP behaviour




Shouldn't the host definition be inside the subnet definition?

Am 23.10.18 um 15:56 schrieb Tony van der Hoff:
> Hi, I havea laptop running fully up to date Stretch with NetworkManager,
> set to use DH|Cp via wireless.
> 
> The DHCP server is another Stretch system, with the stanzas
> host tony-lt {
> 	hardware ethernet 0c:60:76:6c:e6:6f;
> 	fixed-address 192.168.1.199;
> 	}
> subnet 192.168.1.0 netmask 255.255.255.0
> 	{
>         range 192.168.1.200 192.168.1.254;
>         option routers 192.168.1.10;
> 	}
> 
> That MAC is correct for the laptop.
> 
> I an expecting to see 192.168.1.199 as the laptop address, but no, if a
> gives:
> wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
> group default qlen 1000
>     link/ether 0c:60:76:6c:e6:6f brd ff:ff:ff:ff:ff:ff
>     inet 192.168.1.253/24 brd 192.168.1.255 scope global dynamic wlan0
>        valid_lft 479sec preferred_lft 479sec
> 
> Finally, the server shows:
> Oct 23 14:23:38 routerpi dhcpd[1068]: DHCPREQUEST for 192.168.1.253 from
> 0c:60:76:6c:e6:6f (tony-lt) via eth0
> Oct 23 14:23:38 routerpi dhcpd[1068]: DHCPACK on 192.168.1.253 to
> 0c:60:76:6c:e6:6f (tony-lt) via eth0
> Oct 23 14:23:53 routerpi dhcpd[1068]: reuse_lease: lease age 15 (secs)
> under 25% threshold, reply with unaltered, existing lease for 192.168.1.253
> Oct 23 14:23:53 routerpi dhcpd[1068]: DHCPREQUEST for 192.168.1.253 from
> 0c:60:76:6c:e6:6f (tony-lt) via eth0
> Oct 23 14:23:53 routerpi dhcpd[1068]: DHCPACK on 192.168.1.253 to
> 0c:60:76:6c:e6:6f (tony-lt) via eth0
> 
> So, my question: why is the server handing out .253, when it is
> configured to provide .199?
> What is this 'reuse-lease' all about?
> 
> I've tried 'dhclient -r wlan 0; dhclient -v wlan0' on the laptop, to no
> avail.
> 
> Any suggestions, please?
>