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There is a SLES12 with 10.2.64.x IP.

I want to add an additional one, a 10.2.50.x IP.

Before, the routing looks like this: 

SERVER:~ # netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         10.2.64.1       0.0.0.0         UG        0 0          0 foo
10.2.64.0       0.0.0.0         255.255.255.0   U         0 0          0 foo
...
SERVER:~ #

Then I am bringing up the new 10.2.50.x IP: 

SERVER:~ # ifup foo2
foo2       up
SERVER:~ #

Then the routing looks like this: 

SERVER:~ # netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         10.2.64.1       0.0.0.0         UG        0 0          0 foo
10.2.50.0       0.0.0.0         255.255.255.0   U         0 0          0 foo2
10.2.64.0       0.0.0.0         255.255.255.0   U         0 0          0 foo
...
SERVER:~ #

So looks like the 10.2.50.0 packets would go in a wrong direction (???), so I delete that: 

SERVER:~ # ip route del 10.2.50.0/24 via 0.0.0.0 dev foo2
SERVER:~ #

And then I am trying to add the good routing entry (at least AFAIK): 

SERVER:~ # ip route add 10.2.50.0/24 via 10.2.50.1 dev foo2
RTNETLINK answers: Network is unreachable
SERVER:~ #
SERVER:~ # ping -c 1 -w 1 10.2.50.1|grep loss
1 packets transmitted, 1 received, 0% packet loss, time 0ms
SERVER:~ # ifdown foo2
SERVER:~ #

But I got "RTNETLINK answers: Network is unreachable".

The Q: what am I missing? Why can't I add the proper routing entry?

Additionally, while the foo2 is UP, I cannot ping the 10.2.64.x IP.

I am not a networking guy. Just want that there would be these two IPs with correct routing :)

niving6473
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0 Answers0