SEO

Dear experts,

I'm trying to get my two Redhat machines to talk to each other.

They are configured with static IP addresses:

10.0.0.1 red.testrac.com red
10.0.0.2 white.testrac.com white

No DHCP. I also don't have DNS running anywhere.

I thought that the hosts file could substitute for DNS.
But neither machine can find (ping) the other one.

I'll include output from files, and commands.
What am I missing here?

Thanks a lot

-------------------------------------------------------------------------
-------------------------------------------------------------------------
-------------------------------------------------------------------------
-------------------------------------------------------------------------

from red, 10.0.0.1:

Commands:


ifconfig
eth0 Link encap:Ethernet HWaddr 00:07:E9:3C:E3:24
inet addr:10.0.0.1 Bcast:10.255.255.255 Mask:255.0.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
RX bytes:0 (0.0 b) TX bytes:168 (168.0 b)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:261 errors:0 dropped:0 overruns:0 frame:0
TX packets:261 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
RX bytes:17394 (16.9 Kb) TX bytes:17394 (16.9 Kb)


hostname
red

domainname
(none)

hostname -d
testrac.com

dnsdomainname
testrac.com

route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface

10.0.0.0 * 255.0.0.0 U 0 0 0 eth0
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default 10.255.255.254 0.0.0.0 UG 0 0 0 eth0


ping -c 1 10.0.0.1

PING 10.0.0.1 (10.0.0.1) from 10.0.0.1 : 56(84) bytes of data.
64 bytes from 10.0.0.1: icmp_seq=0 ttl=255 time=17 usec

--- 10.0.0.1 ping statistics ---
1 packets transmitted, 1 packets received, 0% packet loss
round-trip min/avg/max/mdev = 0.017/0.017/0.017/0.000 ms


ping -c 1 white

PING white.testrac.com (10.0.0.2) from 10.0.0.1 : 56(84) bytes of data.
From red.testrac.com (10.0.0.1): Destination Host Unreachable

--- white.testrac.com ping statistics ---
1 packets transmitted, 0 packets received, +1 errors, 100% packet loss


host red
;; connection timed out; no servers could be reached


host white
;; connection timed out; no servers could be reached


------------
Files:


cat /etc/hosts

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
10.0.0.1 red.testrac.com red

10.0.0.2 white.testrac.com white



cat /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=10.0.0.1
NETMASK=255.0.0.0
GATEWAY=10.255.255.254


cat /etc/resolv.conf
nameserver 10.0.0.1

cat /etc/host.conf
order hosts,bind


cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=red





---------------------------------------------------------------------
---------------------------------------------------------------------
---------------------------------------------------------------------
---------------------------------------------------------------------

from white, 10.0.0.2

---------------------------
Commands:

ifconfig
eth0 Link encap:Ethernet HWaddr 00:07:E9:E9:34:37
inet addr:10.0.0.2 Bcast:10.255.255.255 Mask:255.0.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:0 (0.0 b) TX bytes:126 (126.0 b)
Interrupt:11 Base address:0xdc80 Memory:ff6fe000-ff6fe038

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:234 errors:0 dropped:0 overruns:0 frame:0
TX packets:234 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:15282 (14.9 Kb) TX bytes:15282 (14.9 Kb)

domainname
(none)

dnsdomainname
testrac.com

hostname
white

hostname -d
testrac.com

route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.0.0 * 255.0.0.0 U 0 0 0 eth0
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default 10.255.255.254 0.0.0.0 UG 0 0 0 eth0


ping -c 1 10.0.0.1

PING 10.0.0.1 (10.0.0.1) from 10.0.0.2 : 56(84) bytes of data.
From 10.0.0.2: Destination Host Unreachable

--- 10.0.0.1 ping statistics ---
1 packets transmitted, 0 packets received, +1 errors, 100% packet loss


ping -c 1 red
PING red.testrac.com (10.0.0.1) from 10.0.0.2 : 56(84) bytes of data.
From white.testrac.com (10.0.0.2): Destination Host Unreachable

--- red.testrac.com ping statistics ---
1 packets transmitted, 0 packets received, +1 errors, 100% packet loss


host red
;; connection timed out; no servers could be reached


host white
;; connection timed out; no servers could be reached


-------------
Files:

cat /etc/hosts
10.0.0.2 white.testrac.com white
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
10.0.0.1 red.testrac.com red


cat /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=10.0.0.2
NETMASK=255.0.0.0
GATEWAY=10.255.255.254
TYPE=Ethernet
USERCTL=no
NETWORK=10.0.0.0
BROADCAST=10.255.255.255
PEERDNS=no


cat /etc/resolv.conf
search localdomain
nameserver 10.0.0.2


cat /etc/host.conf
order hosts,bind


cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=white


-----------
Virtual files:

cat /proc/net/route
Iface Destination Gateway Flags RefCnt Use Metric Mask MTU Window IRTT
eth0 0000000A 00000000 0001 0 0 0 000000FF 0 0 0
lo 0000007F 00000000 0001 0 0 0 000000FF 0 0 0
eth0 00000000 FEFFFF0A 0003 0 0 0 00000000 0 0 0


-----------------------------------------------------------
-----------------------------------------------------------

testOn Sat, 31 Jan 2004 21:28:26 -0800, linuxquestion wrote:

> Dear experts,
>
> I'm trying to get my two Redhat machines to talk to each other.
>
> They are configured with static IP addresses:
>
> 10.0.0.1 red.testrac.com red
> 10.0.0.2 white.testrac.com white
>
> No DHCP. I also don't have DNS running anywhere.
>
> I thought that the hosts file could substitute for DNS.
> But neither machine can find (ping) the other one.
>
> I'll include output from files, and commands.
> What am I missing here?
>
> Thanks a lot
>
> -------------------------------------------------------------------------
> -------------------------------------------------------------------------
> -------------------------------------------------------------------------
> -------------------------------------------------------------------------
>
> from red, 10.0.0.1:
>
> Commands:
>
>
> ifconfig
> eth0 Link encap:Ethernet HWaddr 00:07:E9:3C:E3:24
> inet addr:10.0.0.1 Bcast:10.255.255.255 Mask:255.0.0.0
> UP BROADCAST MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0
> RX bytes:0 (0.0 b) TX bytes:168 (168.0 b)
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:261 errors:0 dropped:0 overruns:0 frame:0
> TX packets:261 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0
> RX bytes:17394 (16.9 Kb) TX bytes:17394 (16.9 Kb)
>
>
> hostname
> red
>
> domainname
> (none)
>
> hostname -d
> testrac.com
>
> dnsdomainname
> testrac.com
>
> route
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use Iface
>
> 10.0.0.0 * 255.0.0.0 U 0 0 0 eth0
> 127.0.0.0 * 255.0.0.0 U 0 0 0 lo
> default 10.255.255.254 0.0.0.0 UG 0 0 0 eth0
>
>
> ping -c 1 10.0.0.1
>
> PING 10.0.0.1 (10.0.0.1) from 10.0.0.1 : 56(84) bytes of data.
> 64 bytes from 10.0.0.1: icmp_seq=0 ttl=255 time=17 usec
>
> --- 10.0.0.1 ping statistics ---
> 1 packets transmitted, 1 packets received, 0% packet loss
> round-trip min/avg/max/mdev = 0.017/0.017/0.017/0.000 ms
>
>
> ping -c 1 white
>
> PING white.testrac.com (10.0.0.2) from 10.0.0.1 : 56(84) bytes of data.
> From red.testrac.com (10.0.0.1): Destination Host Unreachable
>
> --- white.testrac.com ping statistics ---
> 1 packets transmitted, 0 packets received, +1 errors, 100% packet loss
>
>
> host red
> ;; connection timed out; no servers could be reached
>
>
> host white
> ;; connection timed out; no servers could be reached
>
>
> ------------
> Files:
>
>
> cat /etc/hosts
>
> # Do not remove the following line, or various programs
> # that require network functionality will fail.
> 127.0.0.1 localhost.localdomain localhost
> 10.0.0.1 red.testrac.com red
>
> 10.0.0.2 white.testrac.com white
>
>
>
> cat /etc/sysconfig/network-scripts/ifcfg-eth0
>
> DEVICE=eth0
> ONBOOT=yes
> BOOTPROTO=static
> IPADDR=10.0.0.1
> NETMASK=255.0.0.0
> GATEWAY=10.255.255.254
>
>
> cat /etc/resolv.conf
> nameserver 10.0.0.1
>
> cat /etc/host.conf
> order hosts,bind
>
>
> cat /etc/sysconfig/network
> NETWORKING=yes
> HOSTNAME=red
>
>
>
>
>
> ---------------------------------------------------------------------
> ---------------------------------------------------------------------
> ---------------------------------------------------------------------
> ---------------------------------------------------------------------
>
> from white, 10.0.0.2
>
> ---------------------------
> Commands:
>
> ifconfig
> eth0 Link encap:Ethernet HWaddr 00:07:E9:E9:34:37
> inet addr:10.0.0.2 Bcast:10.255.255.255 Mask:255.0.0.0
> UP BROADCAST MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:100
> RX bytes:0 (0.0 b) TX bytes:126 (126.0 b)
> Interrupt:11 Base address:0xdc80 Memory:ff6fe000-ff6fe038
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:234 errors:0 dropped:0 overruns:0 frame:0
> TX packets:234 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:15282 (14.9 Kb) TX bytes:15282 (14.9 Kb)
>
> domainname
> (none)
>
> dnsdomainname
> testrac.com
>
> hostname
> white
>
> hostname -d
> testrac.com
>
> route
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use Iface
> 10.0.0.0 * 255.0.0.0 U 0 0 0 eth0
> 127.0.0.0 * 255.0.0.0 U 0 0 0 lo
> default 10.255.255.254 0.0.0.0 UG 0 0 0 eth0
>
>
> ping -c 1 10.0.0.1
>
> PING 10.0.0.1 (10.0.0.1) from 10.0.0.2 : 56(84) bytes of data.
> From 10.0.0.2: Destination Host Unreachable
>
> --- 10.0.0.1 ping statistics ---
> 1 packets transmitted, 0 packets received, +1 errors, 100% packet loss
>
>
> ping -c 1 red
> PING red.testrac.com (10.0.0.1) from 10.0.0.2 : 56(84) bytes of data.
> From white.testrac.com (10.0.0.2): Destination Host Unreachable
>
> --- red.testrac.com ping statistics ---
> 1 packets transmitted, 0 packets received, +1 errors, 100% packet loss
>
>
> host red
> ;; connection timed out; no servers could be reached
>
>
> host white
> ;; connection timed out; no servers could be reached
>
>
> -------------
> Files:
>
> cat /etc/hosts
> 10.0.0.2 white.testrac.com white
> # Do not remove the following line, or various programs
> # that require network functionality will fail.
> 127.0.0.1 localhost.localdomain localhost
> 10.0.0.1 red.testrac.com red
>
>
> cat /etc/sysconfig/network-scripts/ifcfg-eth0
>
> DEVICE=eth0
> ONBOOT=yes
> BOOTPROTO=static
> IPADDR=10.0.0.2
> NETMASK=255.0.0.0
> GATEWAY=10.255.255.254
> TYPE=Ethernet
> USERCTL=no
> NETWORK=10.0.0.0
> BROADCAST=10.255.255.255
> PEERDNS=no
>
>
> cat /etc/resolv.conf
> search localdomain
> nameserver 10.0.0.2
>
>
> cat /etc/host.conf
> order hosts,bind
>
>
> cat /etc/sysconfig/network
> NETWORKING=yes
> HOSTNAME=white
>
>
> -----------
> Virtual files:
>
> cat /proc/net/route
> Iface Destination Gateway Flags RefCnt Use Metric Mask MTU Window IRTT
> eth0 0000000A 00000000 0001 0 0 0 000000FF 0 0 0
> lo 0000007F 00000000 0001 0 0 0 000000FF 0 0 0
> eth0 00000000 FEFFFF0A 0003 0 0 0 00000000 0 0 0
>
>
> -----------------------------------------------------------
> -----------------------------------------------------------

On Sat, 31 Jan 2004 21:28:26 -0800, linuxquestio wrote:

> Dear experts,
>
> I'm trying to get my two Redhat machines to talk to each other.
>
> They are configured with static IP addresses:
>
> 10.0.0.1 red.testrac.com red
> 10.0.0.2 white.testrac.com white
>
> No DHCP. I also don't have DNS running anywhere.
>
> I thought that the hosts file could substitute for DNS. But neither
> machine can find (ping) the other one.
<snip>

You say "peer to peer" network.. Do you mean machine to machine directly?
Perhaps you need a crossover cable, while you are using regular ethernet
cabling.

As for using /etc/hosts, yes this can substitute for DNS. The reason that
"host" fails, is because it attempts to talk to your DNS server directly,
rather than calling gethostbyname().

HTH,
--
Eric Enright /"\
sauronAtiptsoftDcom \ / ASCII Ribbon Campaign
X Against HTML E-Mail
Public Key: 0xBEDF636F / \

linuxquestion@yahoo.com wrote:

> ifconfig
> eth0 Link encap:Ethernet HWaddr 00:07:E9:3C:E3:24
> inet addr:10.0.0.1 Bcast:10.255.255.255 Mask:255.0.0.0
> UP BROADCAST MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0
> RX bytes:0 (0.0 b) TX bytes:168 (168.0 b)

> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:261 errors:0 dropped:0 overruns:0 frame:0
> TX packets:261 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0
> RX bytes:17394 (16.9 Kb) TX bytes:17394 (16.9 Kb)

The eth0 interfaces on both machines do not show "RUNNING" in the ifconfig
output, which, as you can see, is present for the lo interface. It's a
good bet that is why no communication is possible.

Although I really don't know what the missing RUNNING specifically implies,
my *guess* would be that the cards are not correctly configured for the
hardware.

--
Clifford Kite Email: "echo xvgr_yvahk-ccc@ri1.arg|rot13"
PPP-Q&A links, downloads: http://ckite.no-ip.net/
/* The signal-to-noise ratio is too low in many [news] groups to make
* them good candidates for archiving.
* --- Mike Moraes, Answers to FAQs about Usenet */

> You say "peer to peer" network.. Do you mean machine to machine directly?
> Perhaps you need a crossover cable, while you are using regular ethernet
> cabling.

Yes, this is the case. What is the difference/advantage of using a
crossover cable?

> As for using /etc/hosts, yes this can substitute for DNS. The reason that
> "host" fails, is because it attempts to talk to your DNS server directly,
> rather than calling gethostbyname().

Do you know how I could get it work then?

Here's a question. I noted on the web, that when another user got
his network working, he had
IPADDR: 10.192.8.50
Gateway: 10.192.8.1

I noted that the first three digits of the IP were the same.
Do you think that it is important?

Also, can you others ping your gateway? I can't.

Thanks

Clifford Kite <kite@see.signature.id> wrote in message news:<vb6jvb.qbo.ln@corncob.localhost.tld>...
> linuxquestion@yahoo.com wrote:
>
> > ifconfig
> > eth0 Link encap:Ethernet HWaddr 00:07:E9:3C:E3:24
> > inet addr:10.0.0.1 Bcast:10.255.255.255 Mask:255.0.0.0
> > UP BROADCAST MULTICAST MTU:1500 Metric:1
> > RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> > TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
> > collisions:0
> > RX bytes:0 (0.0 b) TX bytes:168 (168.0 b)
>
> > lo Link encap:Local Loopback
> > inet addr:127.0.0.1 Mask:255.0.0.0
> > UP LOOPBACK RUNNING MTU:16436 Metric:1
> > RX packets:261 errors:0 dropped:0 overruns:0 frame:0
> > TX packets:261 errors:0 dropped:0 overruns:0 carrier:0
> > collisions:0
> > RX bytes:17394 (16.9 Kb) TX bytes:17394 (16.9 Kb)
>
> The eth0 interfaces on both machines do not show "RUNNING" in the ifconfig
> output, which, as you can see, is present for the lo interface. It's a
> good bet that is why no communication is possible.

So, you get RUNNING, on your eth0 output?

> Although I really don't know what the missing RUNNING specifically implies,
> my *guess* would be that the cards are not correctly configured for the
> hardware.

I think that they are configured well enough. There were no drivers
before, and I installed them.

On 1 Feb 2004 11:39:02 -0800, linuxquestion@yahoo.com wrote:
>
> Yes, this is the case. What is the difference/advantage of using a
> crossover cable?


You need a regular cable for nic to hub/switch/router/cable modem.

You need a crossover when you go from nic to nic.
The crossover cable crosses tx wires to connect to rx and rx to tx
pins.

linuxquestion@yahoo.com wrote:
> Clifford Kite <kite@see.signature.id> wrote in message
> news:<vb6jvb.qbo.ln@corncob.localhost.tld>...

>> The eth0 interfaces on both machines do not show "RUNNING" in the ifconfig
>> output, which, as you can see, is present for the lo interface. It's a
>> good bet that is why no communication is possible.

> So, you get RUNNING, on your eth0 output?

Yes.

--
Clifford Kite Email: "echo xvgr_yvahk-ccc@ri1.arg|rot13"
PPP-Q&A links, downloads: http://ckite.no-ip.net/
/* The wealth of a nation is created by the productive labor of its
* citizens. */

linuxquestion@yahoo.com wrote:
>> You say "peer to peer" network.. Do you mean machine to machine directly?
>> Perhaps you need a crossover cable, while you are using regular ethernet
>> cabling.

> Yes, this is the case. What is the difference/advantage of using a
> crossover cable?

A cable directly connecting (no hub or switch) the Ethernet cards of
two hosts together must a crossover cable. See the Ethernet HOWTO
in the "Twisted Pair" section for more on crossover cables.

--
Clifford Kite Email: "echo xvgr_yvahk-ccc@ri1.arg|rot13"
PPP-Q&A links, downloads: http://ckite.no-ip.net/
/* My confidence in this answer (X), on a scale of 0 to 10:
|----|----|----|----|----|----|----|----|----|----X
0----1----2----3----4----5----6----7----8----9----10 */

linuxquestion@yahoo.com wrote:
> Clifford Kite <kite@see.signature.id> wrote in message news:<vb6jvb.qbo.ln@corncob.localhost.tld>...
>
>>linuxquestion@yahoo.com wrote:
>>
>>>ifconfig
>>>eth0 Link encap:Ethernet HWaddr 00:07:E9:3C:E3:24
>>> inet addr:10.0.0.1 Bcast:10.255.255.255 Mask:255.0.0.0
>>> UP BROADCAST MULTICAST MTU:1500 Metric:1
>>> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>>> TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
>>> collisions:0
>>> RX bytes:0 (0.0 b) TX bytes:168 (168.0 b)

The HWaddr says the NICs are Intel ones. Which model?

> I think that they are configured well enough. There were no drivers
> before, and I installed them.

Which driver did you install? What is the output of the command lsmod?