Destination Host Unreachable

[oxman]

Any help is much appreciated.

netgear 4 port dual speed hub DS104

two computers with neatgear FA310TX NICs

Linux Fedora Core 3 on both boxes.

Box#1

[root@singingfalls /]# /sbin/ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:A0:CC:50:38:C7
          inet addr:192.168.10.1  Bcast:192.168.10.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:1 dropped:0 overruns:0 frame:0
          TX packets:38 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:3204 (3.1 KiB)
          Interrupt:9 Base address:0x2000

Not sure what to do about the RX error:1



Box#2

[root@singingfalls /]# /sbin/ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:A0:CC:3B:38:C2
          inet addr:192.168.10.2  Bcast:192.168.10.255  Mask:255.255.255.0
          inet6 addr: fe80::2a0:ccff:fe3b:38c2/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:1898 (1.8 KiB)
          Interrupt:5 Base address:0x2000

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:2033 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2033 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2154525 (2.0 MiB)  TX bytes:2154525 (2.0 MiB)

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)

The hub has a consistant recycling of flashing lights on one cable and I am unable to ping the other box from either computer. They are just not talking. I have tested AND switched cables.
I have the hub set for "normal".

This network system was purchased for me by a friend and it seemed simple to install. I have temporarily turned off the firewalls to facilitate the network install.

[kg4cbk]

An occasional TX or RX error is normal. If you get consistently increasing count of errors then there is a problem to be concerned about.

When you say that one port on the hub has a constent flashing liight that is on one port only?

What number ports are you using? On some netgear hubs the first port has a switch to change it to an uplink port from a standard port. At least in older hubs/switches they sold. Many switches now are able to auto detect and change depending on the cable that is connected.

You should look at the port settings on your linux systems using ethtool. Specifically look for speed and duplex settiings.

Example from one of my systems:

ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: g
Wake-on: g

[oxman]

Thank you very much for the reply.

Originally Posted by kg4cbk

An occasional TX or RX error is normal. If you get consistently increasing count of errors then there is a problem to be concerned about.

It is consistantly at least one error.

When you say that one port on the hub has a constent flashing liight that is on one port only?

Yes only on ONE CABLE no matter which port I use.

What number ports are you using? On some netgear hubs the first port has a switch to change it to an uplink port from a standard port. At least in older hubs/switches they sold. Many switches now are able to auto detect and change depending on the cable that is connected.

There are four cable ports on the hub. I'm using two. It also has an "uplink/normal" button on the face of the hub. I have it set at normal at the moment but did try it with uplink also.

You should look at the port settings on your linux systems using ethtool. Specifically look for speed and duplex settiings.

root@singingfalls]# ethtool eth0
Settings for eth0:
No data available

That's what I get on both boxes. When booting up and shuting down the eth0 is acknowledged. Also, the Network Device and Connection utility says I am "active". As you can see the ethtool eth0 command gives me nothing on either box. Wierd?

[kg4cbk]

Not sure why you don't get any info from ethtool.

But based on your description you may have a bad cable. Can you try a different one that you know is good?

Most switches should have a steady led indicating good link integrity. Another led normally indicates port activity.

If all the leds are flashing then it may be an error indication. Make sure you have good cables and are using normal cables not cross over cables.