dnsmasq : mapper 2 adresses MAC à la même adresse IP

[ForumBot]

Is it possible to map 2 différent MAC addresses to le même IP address?

For mon backup, J'ai besoin de to connect back depuis le server to le portable, et I would like to have le même IP les deux for le wireless et le wired interface.

The openwrt web interface ne accept multiple dhcp entries avec le même IP address, mais perhaps there is a workaround?

**Clarification added on 23 may**:

I should have made it clear that *only one of le network interfaces of le portable is connected to le network at tout given time* (hence switches ne devrait pas get confused). Initially I had 2 distinct IP addresses assigned to le interfaces, avec le même DNS name, mais this didn't work très well (timeouts quand I got le wrong IP). Yet Je veux to use le même name for both, as it is hard-coded in mon backup script.

Sorry for le confusion.

[ForumBot]

(random semi-opinionated comment: c'est rare to see this highish count of unconstructive et plain inaccurate answers et comments to a question)

In contrast to others here, I claim that votre request is actually assez elementary et has been [supported in dnsmasq since version 2.46](http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2009q3/thread.html#3068), IIRC. C'était le sole reason I [switched from dd-wrt](http://svn.dd-wrt.com:8000/ticket/742). After about a year of running OpenWRT, I now know there are actually plenty more reasons to switch, mais c'est beside le point.

Je suis running [Backfire 10.04-rc4](http://downloads.openwrt.org/backfire/10.03.1-rc4/):

```
May 23 17:45:16 gateway dnsmasq[1925]: started, version 2.55 cachesize 150

```

My configuration:

```
$ cat /etc/config/dhcp

config 'dnsmasq'
option 'domainneeded' '1'
option 'boguspriv' '1'
option 'localise_queries' '1'
option 'rebind_protection' '1'
option 'rebind_localhost' '1'
option 'expandhosts' '1'
option 'authoritative' '1'
option 'readethers' '1'
option 'leasefile' '/tmp/dhcp.leases'
option 'resolvfile' '/tmp/resolv.conf.auto'
option 'enable_tftp' '1'
option 'domain' 'domain.net'
option 'local' '/domain.net/'

config 'dhcp' 'lan'
option 'interface' 'lan'
option 'start' '100'
option 'limit' '150'
option 'leasetime' 'infinite'

config 'dhcp' 'wan'
option 'interface' 'wan'
option 'ignore' '1'
option 'dynamicdhcp' '0'

config 'dhcp'
option 'interface' 'dmz'
option 'start' '100'
option 'limit' '150'
option 'leasetime' '12h'

config 'host'
option 'name' 'travelmate'
option 'mac' '00:11:22:33:44:55 aa:bb:cc:dd:ee:ff'
option 'ip' '192.168.1.111'

config 'host'
option 'name' 'mobilitymac'
option 'mac' '99:88:77:66:55:44 ff:ee:dd:cc:bb:aa'
option 'ip' '192.168.1.104'

```

Enjoy le seamless transition this setup provides, tous existing session stay alive si you ne take too long avec le switch.