[uml-devel] uml_switch query

[uml-devel] uml_switch query

[Adil Mujeeb, Noida]

Hi,
I have some questiosn related to uml switch

1. When we attach uml switch with tap device, what should be the command for
it. I haev used:
   a) uml_switch -unix /tmp/uml1 -tap tap10
   But when we configure the device of UML, its not working:
   uml_mconsole umid configure eth0=daemon,,unix,/tmp/uml1
   Assign the IP address to eth device, but it is unable to ping the bridge.

   b) uml_switch -tap tap10
   Now if we configure the device of UML, its working:
   uml_mconsole umid configure eth0=daemon
   Assign the IP address to eth device, it is able to ping the bridge. Here
default socket file is used /tmp/uml.ctl

So why in first case it doesnt work?? Also if i use second approach, there
may be problems. Like if i run one more switch attach with other tap device,
then in that case default socket file is used which is already being used.
This will cause any problems or not?? Same socket file can be attach to
multiple uml_switches??

2. Is it possible to attach the uml switch with multiple tap devices??
  
Thanks and Best Regards, 
Adil Mujeeb




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Re: [uml-devel] uml_switch query

[Blaisorblade]

On Wednesday 12 January 2005 06:10, Adil  Mujeeb, Noida wrote:
> Hi,
> I have some questiosn related to uml switch

> 1. When we attach uml switch with tap device, what should be the command
> for it. I haev used:
>    a) uml_switch -unix /tmp/uml1 -tap tap10
>    But when we configure the device of UML, its not working:
>    uml_mconsole umid configure eth0=daemon,,unix,/tmp/uml1
>    Assign the IP address to eth device, but it is unable to ping the
> bridge.

Well, with two commas like you wrote the syntax seems indeed correct.

>    b) uml_switch -tap tap10
>    Now if we configure the device of UML, its working:
>    uml_mconsole umid configure eth0=daemon
>    Assign the IP address to eth device, it is able to ping the bridge. Here
> default socket file is used /tmp/uml.ctl

> So why in first case it doesnt work?? Also if i use second approach, there
> may be problems. Like if i run one more switch attach with other tap
> device, then in that case default socket file is used which is already
> being used. This will cause any problems or not?? Same socket file can be
> attach to multiple uml_switches??
For what I remember, one uml_switch can manage one socket, and on that socket 
you can attach as many UMLs as you like.
> 2. Is it possible to attach the uml switch with multiple tap devices??
Not necessary I think... the Uml_switch can use the tap device to forward the 
traffic to the host network.
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade


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[uml-devel] uml_switch query

[Adil Mujeeb, Noida]

Hi,
I have some questiosn related to uml switch

1. When we attach uml switch with tap device, what should be the command for
it. I haev used:
   a) uml_switch -unix /tmp/uml1 -tap tap10
   But when we configure the device of UML, its not working:
   uml_mconsole umid configure eth0=daemon,,unix,/tmp/uml1
   Assign the IP address to eth device, but it is unable to ping the bridge.

   b) uml_switch -tap tap10
   Now if we configure the device of UML, its working:
   uml_mconsole umid configure eth0=daemon
   Assign the IP address to eth device, it is able to ping the bridge. Here
default socket file is used /tmp/uml.ctl

So why in first case it doesnt work?? Also if i use second approach, there
may be problems. Like if i run one more switch attach with other tap device,
then in that case default socket file is used which is already being used.
This will cause any problems or not?? Same socket file can be attach to
multiple uml_switches??

2. Is it possible to attach the uml switch with multiple tap devices??
  
Thanks and Best Regards, 
Adil Mujeeb




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RE: [uml-devel] uml_switch query

[Adil Mujeeb, Noida]

Thanks Paolo.
i have done some testing & find out that command
uml_switch -unix /tmp/uml1 -tap tap10
doesn't work as i wrote earlier but if i use the command
uml_switch -tap tap10 -unix /tmp/uml1 
it works fine. So may be the sequencing problem.
It resolves my problem that default socket file is not used & we can specify
our own socket file with -tap option.

Yes, I have tested only one tap device can be attached with a uml switch.

Thanks and Best Regards, 
Adil Mujeeb




-----Original Message-----
From: Blaisorblade [mailto:blaisorblade@yahoo.it]
Sent: Wednesday, January 12, 2005 11:02 PM
To: user-mode-linux-devel@lists.sourceforge.net
Cc: Adil Mujeeb, Noida; user-mode-linux-user@lists.sourceforge.net
Subject: Re: [uml-devel] uml_switch query


On Wednesday 12 January 2005 06:10, Adil  Mujeeb, Noida wrote:
> Hi,
> I have some questiosn related to uml switch

> 1. When we attach uml switch with tap device, what should be the command
> for it. I haev used:
>    a) uml_switch -unix /tmp/uml1 -tap tap10
>    But when we configure the device of UML, its not working:
>    uml_mconsole umid configure eth0=daemon,,unix,/tmp/uml1
>    Assign the IP address to eth device, but it is unable to ping the
> bridge.

Well, with two commas like you wrote the syntax seems indeed correct.

>    b) uml_switch -tap tap10
>    Now if we configure the device of UML, its working:
>    uml_mconsole umid configure eth0=daemon
>    Assign the IP address to eth device, it is able to ping the bridge.
Here
> default socket file is used /tmp/uml.ctl

> So why in first case it doesnt work?? Also if i use second approach, there
> may be problems. Like if i run one more switch attach with other tap
> device, then in that case default socket file is used which is already
> being used. This will cause any problems or not?? Same socket file can be
> attach to multiple uml_switches??
For what I remember, one uml_switch can manage one socket, and on that
socket 
you can attach as many UMLs as you like.
> 2. Is it possible to attach the uml switch with multiple tap devices??
Not necessary I think... the Uml_switch can use the tap device to forward
the 
traffic to the host network.
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade


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