I have a large[ish[ house and to provide good WiFi throughout I run
two Draytek routers. The 'main' one is a Vigor 2860n which connects
to the internet by FTTC, the second one is an old Vigor 2820n which
has its WAN disabled and the LAN hardwired to the 2860n LAN.
Currently I'm using the same SSID on both routers, I've read quite a
lot around this and the weight of opinion seems to be that using the
same SSID should work OK and is more transparent to the user than
using different ones. However I have also tried different SSIDs for
the two routers requiring user intervention to move from one to the
other, this shows the same symptoms (described below) as using the
same SSID.
What happens is that when I move around such that the WiFi connection
should move from the 2820n to the 2860n my laptop loses its IP
address.
DHCP and DNS is provided by dnsmasq running on a RaspberryPi, the
basic IPV4 setup is as follows:-
Vigor 2860n - 192.168.1.1
Raspberry Pi - 192.168.1.2 (runs dnsmasq)
Desktop 192.168.1.3
Vigor 2820n - 192.168.1.20
The Pi assigns IP addresses from 192.168.80 to 192.168.1.127 and the
conf file is:-
domain-needed
bogus-priv
expand-hosts
domain=zbmc.eu
dhcp-range=192.168.1.80,192.168.1.127,12h
dhcp-option=3,192.168.1.1
local=/zbmc.eu/
cname=bbb,beaglebone
cname=mx201,maxine-X201
cname=ben,DESKTOP-978VD5M
cname=oki,MC342-AE529C
dhcp-host=00:BB:3A:E9:A3:15,maxineKindle
dhcp-host=00:09:B0:C9:CE:81,onkyoTx-nr616
dhcp-host=28:EF:01:2D:EB:07,chrisKindle
dhcp-host=08:EB:74:9D:47:53,humaxFreeview
dhcp-host=2C:08:8C:CC:9A:9E,humaxYouview
dhcp-host=00:1F:E2:4E:8F:CA,maxineStudy
dhcp-host=00:25:36:AE:52:9C,192.168.1.50
My laptop seems to lose its IP address whenever I move from one
Draytek's WiFi to the other but only when the IP is assigned by
dnsmasq. If I connect to my guest network (192.168.6.x) then I get a
IP address assigned by the 2860n and a good connection to the outside
world. If I then reconnect to the 'local' WiFi the laptop loses its
IP address. It's as if dnsmasq doesn't see the disconnection and
doesn't answer the new DHCP broadcast from my laptop. If I leave it
disconnected for a minute or two and then re-connect to the WiFi it
*does* get an IP.
Can anyone explain what might be wrong and/or a fix or workaround?
--
Chris Green
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