Routing problems

[John-Mark Gurney]

LiuJiusheng wrote this message on Wed, Oct 24, 2007 at 15:41 +0800:
> Hello all:
> 	I have found something interesting in FreeBSD routing. This is a test environment, which is not used in reality(perhaps meaningless).	
> 	
>                 | host |-------|   router1  |----------| router2 |
> 	         2.2.2.2     2.2.2.1      6.6.6.1   6.6.6.2  X.X.X.X
> 			(All run FreeBSD OS)
> 
> 	Two routes is added to the router1. (4.4.4.0/24 6.6.6.2) and (6.6.6.0/24 2.2.2.2).Then the routing table look this:
> 	Destination        Gateway            Flags    Refs      Use  Netif Expire     
> 	2                  link#3             UC          0        0       
> 	2.2.2.1            00:0c:29:67:a5:88  UHLW        0        4       
> 	2.2.2.2            00:09:6b:42:94:b7  UHLW        1        2          1068
> 	4.4.4/24           6.6.6.2            UGS         0       38       
> 	6                  link#4             UC          0        0       
> 	6.6.6/24           2.2.2.2            UGS         1        0     
> 
> 	At this time, route 4.4.4.0 can not be used. When ping 4.4.4.4, the machine prints: sent to: Invalid argument. If I remove the route 6.6.6.0/24, then all become correct.

You need to have the gateway for 4.4.4/24 be 2.2.2.2...  The routing
code isn't smart enough to follow the trail through 6.6.6/24 to get to
2.2.2.2....

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."