[Prism54-users] Difference between Ad-hoc and master mode
Bradley Chapman
kakadu_croc@yahoo.com
Wed, 24 Dec 2003 07:20:57 -0800 (PST)
Mr. Decreusefond,
--- Laurent Decreusefond <decreuse@enst.fr> wrote:
> What are the differences between Ad-hic and Master mode ? Can the card
> work under Ah-hoc mode.
> The man iwconfig says that
> mode Set the operating mode of the device, which depends on the net-
> work topology. The mode can be Ad-hoc (network composed of only
> one cell and without Access Point), Managed (node connects to a
> network composed of many Access Points, with roaming), Master
> (the node is the synchronisation master or act as an Access
> Point), Repeater (the node forward packets between other wire-
> less nodes), Secondary (the node act as a backup mas-
> ter/repeater), Monitor (the node act as a passive monitor and
> only receives packets) or Auto.
>
> Since I am at home and have only one router (Netgear WGR614), I guess that
> I have only one cell without any access point so that I should use Ad-hoc
> mode. The problem is then that the green LED is kept flashing and
> iwconfig eth1 yields to
> eth1 Netgear WG511 ESSID:"versailles"
> Mode:Ad-Hoc Channel:11 Cell: 42:E6:25:C9:59:B7
> Bit Rate:54Mb/s Sensitivity=20/0
> Retry min limit:8 RTS thr:2347 B Fragment thr:2346 B
> Encryption key:off
> Link Quality:198 Signal level:0 Noise level:48
> Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive retries:0 Invalid misc:0 Missed beacon:0
This is normal - your card is in IEEE Ad-Hoc mode and is waiting for another
802.11b/802.11g card in IEEE Ad-Hoc mode to connect to it.
>
> If I switch to mode Master I then get
> eth1 Lien encap:Ethernet HWaddr 00:09:5B:65:CB:5F
> inet adr:192.168.0.5 Bcast:192.168.0.255 Masque:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 lg file transmission:1000
> RX bytes:0 (0.0 b) TX bytes:2736 (2.6 Kb)
> Interruption:11
> and a stable green LED and
> eth1 Lien encap:Ethernet HWaddr 00:09:5B:65:CB:5F
> inet adr:192.168.0.5 Bcast:192.168.0.255 Masque:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 lg file transmission:1000
> RX bytes:0 (0.0 b) TX bytes:2736 (2.6 Kb)
> Interruption:11
Now your card is an Access Point - "Master Mode" is another definition for
the configuration the card is placed in to make it act like an AP.
>
> So everything seems OK meanwhile I can't use network. May be it is a
> problem with my route. Before anything I have
> Destination Passerelle Genmask Indic MSS Fenêtre irtt
> Iface
> 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0
> eth0
> 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0
> eth1
> 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0
> eth1
> 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0
> lo
> 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0
> eth0
>
>
> eth0 is my wired Ethernet card and it works. If I issue
> route del default
> route add default eth1 gw 192.168.0.1
>
> Routes are the same as previously but the last one where eth0 is replaced
> by eth1 but every ping remains stuck. Is it a network config problem or a
> problem with the card ?
A config problem. Your routing table, with the card in Managed Mode and properly
configured, should look like:
Destination Passerelle Genmask Indic MSS Fenêtre irtt Iface
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
There are numerous FAQs and HOWTOs on the Prism54 website and the Prism54 forums
that will teach you how to set up Managed Mode on your current distro.
Good luck!
Brad
=====
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