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No IP Address??

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Operating Systems Linux Red Hat No IP Address??
# 8  
Old 05-20-2014
We have been editing and crossposting simultaneously. Reposting this if you didn't see.
Quote:
Originally Posted by Corona688
[edit] crosspost.

I don't know enough about your network to guess what's going wrong here.

Code:
[ 192.168.1.2 netmask ??? ] ------- [ ??? netmask ??? / ??? netmask ??? ] ----- [ ???

Please fill out more of this picture.
# 9  
Old 05-20-2014
So if you hace dhcp in LAN ifcfg-eth0 should look like this:
DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes

If you want to use static IP try it:

DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
NETMASK=255.255.255.0
IPADDR=10.0.0.1
GATEWAY 10.0.0.250
# 10  
Old 05-20-2014
Quote:
Originally Posted by strik
So if you hace dhcp in LAN ifcfg-eth0 should look like this:
DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes
His network has been described as one laptop plugged into another. I doubt either laptop has a DHCP server. So, unlikely to work.
# 11  
Old 05-21-2014
So I set a static IP for eth0 but no luck. Pinging the specified address from another computer wired through an ethernet cable showed nothing.

I am having another issue now in that I cannot get the computer to assign any IP...not sure what happened.

To provide some more information on the scenario here are some outputs:

$ip addr show
Code:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
    link/ether 00:15:b7:d8:60:52 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:19:d2:42:5e:ac brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.111/24 brd 192.168.1.255 scope global wlan0
    inet6 fe80::219:d2ff:fe42:5eac/64 scope link 
       valid_lft forever preferred_lft forever
4: sit0: <NOARP> mtu 1480 qdisc noop state DOWN 
    link/sit 0.0.0.0 brd 0.0.0.0

$cat /etc/sysconfig/networking/devices/ifcfg-eth0
Code:
DEVICE="eth0"
BOOTPROTO="static"
NM_CONTROLLED="yes"
ONBOOT="yes"
TYPE="Ethernet"
IPADDR=10.0.0.1
NETMASK=255.255.255.0
BROADCAST=192.168.1.255
NETWORK=192.168.1.0
GATEWAY=10.0.0.250
PEERDNS="no"

$cat /etc/sysconfig/network-scripts/ifcfg-eth0
Code:
DEVICE="eth0"
BOOTPROTO="static"
NM_CONTROLLED="yes"
ONBOOT="yes"
TYPE="Ethernet"
IPADDR=10.0.0.1
NETMASK=255.255.255.0
BROADCAST=192.168.1.255
NETWORK=192.168.1.0
GATEWAY=10.0.0.250
PEERDNS="no"

I have configured my program to run a server application that opens a socket and listens for incoming connections on a given port.

The client onthe other computer trying to connect to an IP on that port. Now, I am assuming that I want to be trying to connect to 10.0.0.1?

Thanks

---------- Post updated at 08:51 AM ---------- Previous update was at 08:46 AM ----------

Oh and one more ouput that may be helpful:

$/sbin/ifconfig -a

Code:
eth0      Link encap:Ethernet  HWaddr 00:15:B7:D8:60:52  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Interrupt:16 Memory:ffce0000-ffd00000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:48 errors:0 dropped:0 overruns:0 frame:0
          TX packets:48 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:3760 (3.6 KiB)  TX bytes:3760 (3.6 KiB)

sit0      Link encap:IPv6-in-IPv4  
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

wlan0     Link encap:Ethernet  HWaddr 00:19:D2:42:5E:AC  
          inet addr:192.168.1.111  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::219:d2ff:fe42:5eac/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4403 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3475 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2156150 (2.0 MiB)  TX bytes:770728 (752.6 KiB)

Last edited by Corona688; 05-21-2014 at 12:09 PM..
# 12  
Old 05-21-2014
None of that is useful since you have given no indication which is what, on what machine, trying to contact what in what way. I'm not even sure if that's output from one machine or several.

If that's just one, the other machines matter, because this is a network, not a serial port.

If you'd filled out a little of the picture I'd asked for that might be helpful, but at this point we are still "just guessing". Please answer my questions and show what you've been doing.
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