rtems_bsdnet_show_inet_routes

[Ian Caddy]

Hi Joel,

I am not a texi person and I haven't got 4.8 setup in my system (so not 
tested), but hopefully this is a patch file for the testing.t file of 
the network supplement.

Let me know if it works and/or if you need me to do anymore on this.

regards,

Ian Caddy


Joel Sherrill wrote:
> Ian.. can you submit a patch that adds this explanation
> somewhere in the networking guide?
> 
> Thanks.
> 
> --joel
> 
> Ian Caddy wrote:
>> Hi Leon,
>>
>> I have had to explain almost the same things previously to our
>> customers, so I have researched this in the past.
>>
>> Leon Pollak wrote:
>>  
>>> I have the board with two interfaces. When I run 
>>> rtems_bsdnet_show_inet_routes
>>> with both interfaces configured with static IP addresses I receive the
>>> following:
>>> -- 
>>> Destination     Gateway/Mask/Hw    Flags     Refs     Use Expire 
>>> Interface
>>> 127.0.0.1       127.0.0.1          UH          0        0      0 lo0
>>> 192.168.1.0     255.255.255.0      U           0        0      2 eth1
>>> 192.168.50.0    255.255.255.0      U           0        0      1 eth0
>>> -- 
>>> But, when I define the first IF "eth0" to use bootp protocol, the 
>>> result looks
>>> as following:
>>>
>>> Destination     Gateway/Mask/Hw    Flags     Refs     Use Expire 
>>> Interface
>>> default         192.168.50.1       UGS         0        0      0 eth0
>>> 127.0.0.1       127.0.0.1          UH          0        0      0 lo0
>>> 192.168.1.0     255.255.255.0      U           0        0      2 eth1
>>> 192.168.50.0    255.255.255.0      U           0        0      4 eth0
>>> 192.168.50.1                       UHL         1        0      4 eth0
>>>
>>> -----------------
>>> The questions are:
>>> 1. What do the last 2 lines mean?
>>>     
>>
>> The first of the two last lines is for the default route for the subnet
>> of eth0, the same as the last line in the first section.
>>
>> The last line is for the the connection you have had with that
>> particular IP address (your DHCP server).
>>
>> This table is your current routing table.
>>
>>  
>>> 2. What is the "Expire" column meaning?
>>>     
>>
>> The expire column indicates that the particular route will be dropped if
>> there is no activity for the expiry time.
>>
>>  
>>> 3. How are the "Flags" column letters interpreted?
>>>     
>>
>> Since the stack comes from BSD, I have a link that explains a lot of
>> what I am telling you as well:
>>
>> http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-routing.html 
>>
>>
>> Here is the list of flags:
>>
>> U       Up: The route is active.
>> H       Host: The route destination is a single host.
>> G       Gateway: Send anything for this destination on to this remote
>>         system, which will figure out from there where to send it.
>> S       Static: This route was configured manually, not automatically
>>         generated by the system.
>> C       Clone: Generates a new route based upon this route for machines
>>         we connect to. This type of route is normally used for local
>>         networks.
>> W       WasCloned: Indicated a route that was auto-configured based upon
>>         a local area network (Clone) route.
>> L       Link: Route involves references to Ethernet hardware.
>>
>>
>> Hope this helps.
>>
>> regards,
>>
>> Ian Caddy
>>
>> -- 
>> Ian Caddy
>> Goanna Technologies Pty Ltd
>> +61 8 9444 2634
>>
>> _______________________________________________
>> rtems-users mailing list
>> rtems-users at rtems.com
>> http://rtems.rtems.org/mailman/listinfo/rtems-users
>>   
> 
> 

-- 
Ian Caddy
Goanna Technologies Pty Ltd
+61 8 9444 2634


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