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Re: Nasty little network problem



On Fri, 23 May 2003, Harry Putnam wrote:

> I'm somewhat experienced with networking but have run out of ideas
> with this.
> 
> Please bare with the onslaught of data:
> A quick picture:
> 
> I'll just use the last to octets of ip numbers since they all start
> 192.168*
> 
>                      INTERNET
>                         |
>                      CABLE MODEM   
>                         |
>                      ROUTER (Hardware [Netgear]) IP 0.20 
>                         |
>                     M5  rh 7.1 IP 1.6 (in) IP 0.5 (out)
>                          |
>                       H  U  B (Netgear hub no address not a switch))                       
>                 |        |         |         |  
>                IP 1.7   IP 1.5    IP 1.10   IP 1.11 
>                M1       M2        M3        M4
> The four boxes in a row on the local side work fine with the
> exception of M2   They are M1 obsd M2 linux M3 linux M4 solaris X86
> 
> M5 is a sort of router too its IPMASQUERADING for the other 4.
> (running RH 7.1 and masquerading with iptables)
> 
> The mechanical setup really isn't in doubt.  3 of the 4 work.
> All four share the same or similar /etc/resolv.conf /etc/hosts
> 
> All local addressing is static.  The router pulls down an address
> from cable modem via dhcp (cox hookup)
> 
> I've checked and rechecked my cables and the ports on the hub. 
> Using several of each.
> 
> Now the data:  
> netstat -nr shows:
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
> 192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U         0 0          0 lo
> 0.0.0.0         192.168.1.6     0.0.0.0         UG        0 0          0 eth0
> 
> 
> ifconfig eth0 shows:
> 
> eth0      Link encap:Ethernet  HWaddr 00:04:75:AB:F2:33  
>           inet addr:192.168.1.5  Bcast:192.168.0.255  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:38 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:279 errors:0 dropped:0 overruns:0 carrier:13
>           collisions:0 txqueuelen:100 
>           RX bytes:2280 (2.2 Kb)  TX bytes:16740 (16.3 Kb)
>           Interrupt:10 Base address:0x3000 
> 
> 
> cat /etc/sysconfig/network:
>   NETWORKING=yes
>   HOSTNAME=hgp.local.lan
>   GATEWAY=192.168.1.6
> 
> cat /etc/sysconfig/network-scripts/ifcfg-eth0
>   DEVICE=eth0
>   BOOTPROTO=none
>   BROADCAST=192.168.0.255
                     ^^^^
                     ^^^^

Is this a typo or how it is really configured??

>   IPADDR=192.168.1.5
>   GATEWAY=192.168.1.6
>   NETMASK=255.255.255.0
>   NETWORK=192.168.1.0
>   ONBOOT=yes
> 
> Running service network restart:
> Shows me 5 oks
> 
> Still with all that in place the questionable box can't see any of
> the others on the hub, not to mention the routers or internet.
> Whereas the other 3 can.  With very similar reading and settings.
> I'm mailing this from M1 thru the linux router, hardware router and
> cable modem.
> 
> 
> 
> 
> 

-- 
.............Tom	"Nothing would please me more than being able to 
tdiehl rogueind com	hire ten programmers and deluge the hobby market 
			with good software." -- Bill Gates 1976

   			We are still waiting ....




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