Re: Local network hosts unreachable

[Marc Shapiro <mshapiro_42@yahoo.com>]

> --- gerardo juarez-mondragon
> <gjuarezmondragon@metacrawler.com> wrote:
> 
> > Just wondering, 
> > 
> > Did your setup ever work? 
 
Yes.  Everything worked fine until about a week ago.

> If yes, does your 4
> port switch have one of these buttons to select
> Uplink on/off? If yes, is it in the correct
> position? 

Nothing is using the uplink/5th port, so it really
does not matter which position it is in.

Any help in gettin this to work will be greatly
appreciated.  I am currently reduced to reading e-mail
and web-browsing on a Windows laptop with a 'g' key
that sometimes works and a broken hinge that could
fall off at any time.

Here is what information I have gathered, or been
asked for by others attempting to help me solve this
problem:

I am able to 'ping localhost' from either box.

I am unable to ping my gateway box from the desktop,
or ping the desktop from the gateway.

When I attempt a ping from either box to the other,
both sets of lights on the switch blink, suggesting
that data is going through the switch, both NICs and
both cables.  The lights on the switch correctly
show 100Mb/sec full-duplex connections from both
machines.  I have already changed the NIC on the
gateway machine in an attempt to solve this.  The
desktop machine has a built in NIC and is only a few
months old. 

Everything worked fine until about a week ago.

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

On the desktop box (xander  -- 192.168.0.3):

/etc/network/interfaces:

# /etc/network/interfaces -- configuration file for
ifup(8), ifdown(8)
# The loopback interface
auto lo
iface lo inet loopback
# The first network card - this entry was created
during the Debian installation
# (network, broadcast and gateway are optional)
auto eth0
iface eth0 inet static
address 192.168.0.3
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255

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

output of ifconfig:

eth0      Link encap:Ethernet  HWaddr
00:11:5B:1B:8F:1F  
          inet addr:192.168.0.3  Bcast:192.168.0.255

Mask:255.255.255.0
          inet6 addr: fe80::211:5bff:fe1b:8f1f/64
Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500 
Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0
frame:0
          TX packets:223 errors:0 dropped:0
overruns:0
carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 b)  TX bytes:9534 (9.3
KiB)
           Interrupt:19 Base address:0xe400 
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:193 errors:0 dropped:0
overruns:0
frame:0
          TX packets:193 errors:0 dropped:0
overruns:0
carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:72672 (70.9 KiB)  TX bytes:72672
(70.9 KiB)

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

/etc/hosts:

127.0.0.1       local.net       xander  localhost   
 loopback
192.168.0.1mareschal
192.168.0.2alexander
192.168.0.3xander
# The following lines are desirable for IPv6 capable
hosts
# (added automatically by netbase upgrade)
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

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

/etc/networks:

localnet 192.168.0.0

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

output of mii-tool:

eth0: negotiated 100baseTx-FD, link ok

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

On the gateway box (mareschal -- 192.168.0.1):

/etc/network/interfaces:

# Used by ifup(8) and ifdown(8). See the
interfaces(5)
manpage or
# /usr/share/doc/netbase/examples for more
information.
#
iface lo inet loopback
iface ppp0 inet ppp
iface eth0 inet static
address 192.168.0.1
netmask 225.225.225.0
broadcast 192.168.0.225
network 192.168.0.0
up route add default ppp0
down route del ppp0

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

output of ifconfig:

eth0      Link encap:Ethernet  HWaddr
00:12:17:54:0D:EF  
          inet addr:192.168.0.1  Bcast:192.168.0.255

Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500 
Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0
frame:0
          TX packets:48 errors:0 dropped:0
overruns:0
carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:0 (0.0 b)  TX bytes:2016 (1.9
KiB)
          Interrupt:11 Base address:0x2400 
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:67 errors:0 dropped:0
overruns:0
frame:0
          TX packets:67 errors:0 dropped:0
overruns:0
carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:7028 (6.8 KiB)  TX bytes:7028
(6.8
KiB)

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

/etc/hosts:

127.0.0.1       local.net       mareschal      
localhost       loopback
92.168.0.1mareschal
192.168.0.2alexander
192.168.0.3xander
# The following lines are desirable for IPv6 capable
hosts
# (added automatically by netbase upgrade)
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

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

/etc/networks:

localnet 127.0.0.0

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

output of mii-tool:

eth0: negotiated 100baseTx-FD flow-control, link ok

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

Marc