Re: Dummy network device

[Rick Knight]

Randy.Dunlap wrote:

> | From: Rick Knight
> | 
> | David S. Miller wrote:
> | 
> | >On Tue, 09 Mar 2004 15:11:48 -0800
> | >Rick Knight <rick@xxxxxxxxxxxx> wrote:
> | >
> | >  
> | >
> | >>I found the answer. From the archive. Decided to look at dummy.c and 
> | >>numdummies=1, changed it to numdummies=3 and rebuilt that module. Works 
> | >>like a charm.
> | >>
> | >>Question/Suggestion, couldn't this be made an option at configuration? 
> | >>Kind of like number_of_ptys=256.
> | >>    
> | >>
> | >
> | >Specify "numdummies=3" on the module load command line.
> | >  
> | >
> | >It's supposed to be changeable at module load time, without
> | >rebuilding it.  Try this e.g.:
> | >
> | >modprobe dummy numdummies=4
> | >
> | >--
> | >~Randy
> | >  
> | >
> | Randy, David,
> | 
> | Thanks for the replies.
> | 
> | I did try 'modprobe dummy numdummies=3', however, I didn't quote 
> | numdummies=3. Are the quote required? Is there a modprobe.conf option? 
> | Probably "options dummy "numdummies=3".
>
> No, the quotes are not required.  This works for me:
> modprobe dummy numdummies=3
>
> Using /etc/modprobe.conf also works, as you suggested, but without
> the quotation marks:
> options dummy numdummies=3
>
> Either way shows this in /proc/net/dev:
>
> dummy0:       0       0    0    0    0     0          0         0        0
> 0    0    0    0     0       0          0
> dummy1:       0       0    0    0    0     0          0         0        0
> 0    0    0    0     0       0          0
> dummy2:       0       0    0    0    0     0          0         0        0
> 0    0    0    0     0       0          0
>
>
> HTH.
> --
> ~Randy
>  
Randy,

I did try 'modprobe dummy numdummies=3' and I didn't work. I got an 
error and the following showed up in /var/log/messages...

Mar  9 14:42:33 l43w2k021 modprobe: FATAL: Error inserting dummy 
(/lib/modules/2.6.3/kernel/drivers/net/dummy.ko): Unknown symbol in 
module, or unknown parameter (see dmesg)

Now it works and I get no error message. I tried numdummies= on another 
similarly configured machine and it worked first time. So maybe the 
error message above was caused by a typo when I tried it the first time

Anyway, numdummies= does work as you said.

Thanks,
Rick Knight
(rick@xxxxxxxxxxxx)

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