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Can't ping internet. Need help

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Special Forums IP Networking Can't ping internet. Need help
# 1  
Old 10-20-2006
Can't ping internet. Need help
I am running AIX, and just newly installed this sytem.

I thought I had all the settings correct, but may be wrong.

I set up the DNS to point to my router which has DNS relay.
Router IP is 192.168.0.1
AIX server IP is 192.168.0.164

I can ping my router with no problem. When I do a traceroute to my router, it says :
trying to get source for 192.168.0.1
source should be 192.168.0.164

I have problem when I try to ping www.yahoo.com I get:

"PING www.yahoo-ht2.akadns.net: (209.191.93.52) : 56 data bytes
0821-069 ping: sendto: Cannot reach the destination network.
ping: wrote www.yahoo-ht2.akadns.net 64 chars, ret=-1"


Now, I do a traceroute for www.yahoo.com, I get:

"Trying to get source for www.yahoo.com
source should be 127.0.0.1
traceroute to www.yahoo-ht2.akadns.net (209.191.93.52) from 127.0.0.1, 30 hops max
sendto: Cannot reach the destination network."

It seems the traceroute to my router is yahoo is using 127.0.0.1 (loopback) as source. Could this be the problem or something else?
# 2  
Old 10-20-2006
Looks to me like you're missing a default router. Try netstat -nr and see if a default route is listed. If not, use smit to set one.
# 3  
Old 10-20-2006
How do I tell if I am missing a default route?


Code:
# netstat -rn
Routing tables
Destination      Gateway           Flags   Refs     Use  If   PMTU Exp Groups

Route Tree for Protocol Family 2 (Internet):
127/8            127.0.0.1         U        33     3851  lo0     -   -
192.168.0.0      192.168.0.164     UHSb      0        0  en0     -   -  =>
192.168.0/24     192.168.0.164     U         2       85  en0     -   -
192.168.0.1      192.168.0.1       UGHW      1        0  en0     -   -
192.168.0.164    127.0.0.1         UGHS      0       17  lo0     -   -  =>
192.168.0.164/32 192.168.0.1       UGc       0        0  en0     -   -
192.168.0.255    192.168.0.164     UHSb      0        4  en0     -   -

Route Tree for Protocol Family 24 (Internet v6):
::1              ::1               UH        0        0  lo0 16896   -

Last edited by mrciano1; 10-20-2006 at 02:04 PM..
# 4  
Old 10-20-2006
It is listed in the output with the name "default" - you don't have one.

Here is the top few lines when I do it on one of my servers (IP addresses edited).

Code:
(root@nimrod):/# netstat -nr
Routing tables
Destination      Gateway           Flags   Refs     Use  If   Exp  Groups

Route Tree for Protocol Family 2 (Internet):
default         333.444.555.666    UG       25 2442977259 en3      -      -
127/8           127.0.0.1          U        13    349485 lo0      -      -
333.444.555/24  333.444.555.667    UG        0         0 en1      -      -

Since you don't have default listed, it is trying to route through your loopback address instead. I don't remember the exact path to set it, but try smitty tcpip, setting the default router should be within one of the items under that menu.
Last edited by rhfrommn; 10-20-2006 at 05:30 PM.. Reason: fixing missed characters in netstat output
# 5  
Old 10-20-2006
Yep. Select the Minimum Configuration option and it's a couple of lines from the bottom. Select F6 to see the command line for setting the info (/usr/sbin/mktcpip). I do that to see what the command line looks like and then run man mktcpip (in this case) to try and understand the command better.

Carl
# 6  
Old 10-20-2006
Computer
Thanks guys. Thats what it was. I am now connected.

I need the Staples "That was easy" button......
# 7  
Old 10-20-2006
Quote:
Originally Posted by mrciano1
Thanks guys. Thats what it was. I am now connected.

I need the Staples "That was easy" button......
But you already have it. https://www.unix.com Smilie

Carl
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