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"Network is unreachable" error

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I have my unRAID server set up with a PCI D-Link DGE-530T gigabit ethernet adapter.  I have verified that the card works perfectly on the same computer with an Ubuntu live CD.  The on-board ethernet controller is disabled in the BIOS. When I boot unRAID, the D-Link card sets set up as eth0, and it appears to have an IP address assigned to it and everything, but I cannot access (or ping) the unRAID server from another machine on the network, and if I try to ping anything from the unRAID server, I get a "Network is unreachable" error.  I have searched for a solution, but was unable to find anything.  Any ideas on how to solve this?

I have my unRAID server set up with a PCI D-Link DGE-530T gigabit ethernet adapter.  I have verified that the card works perfectly on the same computer with an Ubuntu live CD.  The on-board ethernet controller is disabled in the BIOS. When I boot unRAID, the D-Link card sets set up as eth0, and it appears to have an IP address assigned to it and everything, but I cannot access (or ping) the unRAID server from another machine on the network, and if I try to ping anything from the unRAID server, I get a "Network is unreachable" error.  I have searched for a solution, but was unable to find anything.  Any ideas on how to solve this?

Yes, post a syslog.  Only then will we have the clues needed to assist.

Syslog in attachment.

I see no IP address being assigned.

 

Are you using a fixed IP address? or are you using a DHCP server to assign one?

 

If you are attempting to assign a fixed IP address you ALSO need to set the gateway and network mask.

 

Network mask is usually: 255.255.255.0

Gateway is usually the IP address of your router.

 

The one address I do see in your syslog is NOT one that I'd ever expect to see.  It is not one reserved for a local area network.  Those are in the ranges listed in this link:

http://www.mtmnet.com/PDF_FILES/NonRoutableIPaddresses.PDF

 

I'd expect to see an address looking something like:

192.168.XXX.XXX

or

10.XXX.XXX.XXX

 

If you use an address outside of the those reserved for local use your router will attempt to route them to the outside world, and the very real possibility exists it will be in  conflict with one assigned to another person.

 

Joe L.

 

 

  • Author

My network situation is a bit unorthodox.  I have the unRAID box set up to utilize DHCP.  I have both the unRAID server and my Windows 7 desktop PC connected to my gigabit switch, which is also connected to the ethernet jack in my dorm room.  In this situation, my desktop PC gets a 136.176.xxx.xxx address (which I believe is always the same, due to the network recognizing my MAC address) via DHCP.  This is the same address that whatismyip.com returns.  My unRAID server running an Ubuntu livecd gets a similar address via DHCP, and full network and Internet access with no fusswork.  ifconfig in unRAID does return me an IP.  I hope that all makes sense.  If I left something out or if a detail is unclear, don't hesitate to ask.

My network situation is a bit unorthodox.  I have the unRAID box set up to utilize DHCP.  I have both the unRAID server and my Windows 7 desktop PC connected to my gigabit switch, which is also connected to the ethernet jack in my dorm room.  In this situation, my desktop PC gets a 136.176.xxx.xxx address (which I believe is always the same, due to the network recognizing my MAC address) via DHCP.  This is the same address that whatismyip.com returns.  My unRAID server running an Ubuntu livecd gets a similar address via DHCP, and full network and Internet access with no fusswork.  ifconfig in unRAID does return me an IP.  I hope that all makes sense.  If I left something out or if a detail is unclear, don't hesitate to ask.

OK,

 

you do not have a router, but are using the one that feeds your dormitory.

 

You are apparently somehow getting these lines in the syslog

Aug 30 14:23:30 Tower kernel: skge eth0: Link is up at 1000 Mbps, full duplex, flow control both

Aug 30 14:23:31 Tower ifplugd(eth0)[1013]: Link beat detected.

Aug 30 14:23:32 Tower ifplugd(eth0)[1013]: Executing '/etc/ifplugd/ifplugd.action eth0 up'.

Aug 30 14:23:32 Tower ifplugd(eth0)[1013]: client: USAGE: ipmask/ifconfig <decimal netmask> <decimal IP address>

Aug 30 14:23:32 Tower logger: /etc/rc.d/rc.inet1:  /sbin/ifconfig eth0 169.254.99.24 broadcast  netmask

Aug 30 14:23:33 Tower ifplugd(eth0)[1013]: client: netmask: Host name lookup failure

 

I see NO evidence of it using DHCP, or requesting an address.

 

Where is the 169.264.99.24 address coming from?

 

The line in your syslog should look more like this line from my syslog:

Aug 28 17:36:47 Tower logger: /etc/rc.d/rc.inet1:  /sbin/ifconfig eth0 192.168.2.100 broadcast 192.168.2.255 netmask 255.255.255.0

 

 

What do you have in the following fields for networking on your settings page?

  MAC address:

  Obtain IP Address Automatically:

  IP Address:

  Netmask:

  Gateway:

  Obtain DNS Server Address Automatically:

  DNS Server 1:

  DNS Server 2:

  DNS Server 3:

  • Author

Well I'm an idiot.  I thought I had turned DHCP on, after messing with other stuff; turns out I did not.  Everything is working great now.  Thanks for the help.

A 169.x.x.x address typically is a self-assigned address -- meaning no DHCP server found, so the NIC assigned itself one.

 

Technically however, it is in the private network address space.

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