Re: [Dnsmasq-discuss] DHCP problem when moving from one WiFi SSID to another
On 12/26/2018 6:58 PM, Chris Green wrote: > 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? > > How is this issue different from the one you posted a fiew mounths back (1)? Did you try what Simon Kellie suggested then? 1) http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2018q2/012225.html -- John Doe ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] [PATCH] Fix typo in ra-param man page section
--- man/dnsmasq.8| 2 +- man/fr/dnsmasq.8 | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git man/dnsmasq.8 man/dnsmasq.8 index f01a5ba..9c30d2b 100644 --- man/dnsmasq.8 +++ man/dnsmasq.8 @@ -1829,7 +1829,7 @@ The interval between router advertisements may be set (in seconds) with .B --ra-param=eth0,60. The lifetime of the route may be changed or set to zero, which allows a router to advertise prefixes but not a route via itself. -.B --ra-parm=eth0,0,0 +.B --ra-param=eth0,0,0 (A value of zero for the interval means the default value.) All four parameters may be set at once. .B --ra-param=eth0,mtu:1280,low,60,1200 diff --git man/fr/dnsmasq.8 man/fr/dnsmasq.8 index 88967df..a04c776 100644 --- man/fr/dnsmasq.8 +++ man/fr/dnsmasq.8 @@ -1774,7 +1774,7 @@ Un intervalle (en secondes) entre les annonces routeur peut être fourni par : .B --ra-param=eth0,60. La durée de vie de la route peut être changée ou mise à zéro, auquel cas le routeur peut annoncer les préfixes mais pas de route : -.B --ra-parm=eth0,0,0 +.B --ra-param=eth0,0,0 (une valeur de zéro pour l'intervalle signifie qu'il garde la valeur par défaut). Ces quatre paramètres peuvent être configurés en une fois : .B --ra-param=eth0,mtu:1280,low,60,1200 -- 2.20.1 ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Documentation error (minor)
On 12/26/2018 7:40 PM, Chris Green wrote: > While looking through the example dnsmasq.conf file comments with a > view to seeing if there was anything relevant to my recent question > about losing DHCP configuration when re-connecting I found:- > > # Set the DHCP server to authoritative mode. In this mode it will barge in > # and take over the lease for any client which broadcasts on the network, > # whether it has a record of the lease or not. This avoids long timeouts > # when a machine wakes up on a new network. DO NOT enable this if there's > # the slightest chance that you might end up accidentally configuring a > DHCP > # server for your campus/company accidentally. The ISC server uses > # the same option, and this URL provides more information: > # http://www.isc.org/files/auth.html > #dhcp-authoritative > > The link http://www.isc.org/files/auth.html is broken and, although I > searched around a bit in isc.org I couldn't find anything relevant. > Simply look for 'authoritative DHCP server' on the internet machine. > By the way, while I'm about it would this possibly be the answer to my > DHCP re-connect problem? "This avoids long timeouts when a machine > wakes up on a new network." does sound a bit hopeful. However I'm not > really clear what the sentence after means so I'm not sure if I can > try this safely or not. > If you have only one DHCP server on your network, you should be fine trying '--dhcp-authoritative'. -- John Doe ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] Documentation error (minor)
While looking through the example dnsmasq.conf file comments with a view to seeing if there was anything relevant to my recent question about losing DHCP configuration when re-connecting I found:- # Set the DHCP server to authoritative mode. In this mode it will barge in # and take over the lease for any client which broadcasts on the network, # whether it has a record of the lease or not. This avoids long timeouts # when a machine wakes up on a new network. DO NOT enable this if there's # the slightest chance that you might end up accidentally configuring a DHCP # server for your campus/company accidentally. The ISC server uses # the same option, and this URL provides more information: # http://www.isc.org/files/auth.html #dhcp-authoritative The link http://www.isc.org/files/auth.html is broken and, although I searched around a bit in isc.org I couldn't find anything relevant. By the way, while I'm about it would this possibly be the answer to my DHCP re-connect problem? "This avoids long timeouts when a machine wakes up on a new network." does sound a bit hopeful. However I'm not really clear what the sentence after means so I'm not sure if I can try this safely or not. -- Chris Green ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] DHCP problem when moving from one WiFi SSID to another
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 ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
