Peer to peer network with two machines, ping doesn't work
This is a discussion on Peer to peer network with two machines, ping doesn't work within the Linux Networking forums, part of the Linux Forums category; Dear experts, I'm trying to get my two Redhat machines to talk to each other. They are configured with ...
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02-01-2004
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Peer to peer network with two machines, ping doesn't work
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 ----------------------------------------------------------- ----------------------------------------------------------- 
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02-01-2004
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Re: Peer to peer network with two machines, ping doesn't work
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 > > > ----------------------------------------------------------- > -----------------------------------------------------------
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02-01-2004
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Re: Peer to peer network with two machines, ping doesn't work
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 / \
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02-01-2004
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Re: Peer to peer network with two machines, ping doesn't work
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 */
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02-01-2004
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Re: Peer to peer network with two machines, ping doesn't work
> 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
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02-01-2004
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Re: Peer to peer network with two machines, ping doesn't work
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.
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02-01-2004
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Re: Peer to peer network with two machines, ping doesn't work
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.
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02-01-2004
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Re: Peer to peer network with two machines, ping doesn't work
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. */
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02-01-2004
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Re: Peer to peer network with two machines, ping doesn't work
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 */
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02-01-2004
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Re: Peer to peer network with two machines, ping doesn't work
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?
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