[Gllug] network - can ping but not connect

[will]

On Monday 20 May 2002 9:32 am, Sean Burlington wrote:
> I'm playing around with an old 386 and having strange network problems
>
> machine1 386 with tomsrtbt disk
> machine2 pIII RH7.3 (no firewall)
>
> both machines can ping each other
>
> ifconfig output of both looks good
>
> eth0      Link encap:Ethernet  HWaddr 00:50:DA:35:C2:40
>           inet addr:192.168.0.2  Bcast:192.168.0.255  Mask:255.255.255.0
>           UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:1148 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:1190 errors:0 dropped:0 overruns:0 carrier:2
>           collisions:3 txqueuelen:100
>           RX bytes:558907 (545.8 Kb)  TX bytes:133636 (130.5 Kb)
>           Interrupt:11 Base address:0x1000
>
> route looks good
>
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface 192.168.0.0     *               255.255.255.0   U     0      0       
> 0 eth0 127.0.0.0       *               255.0.0.0       U     0      0      
>  0 lo default         gw              0.0.0.0         UG    0      0       
> 0 eth0
>
> (other machine show similar results except that no error or collisions
> shown rx bytes 4962 tx bytes 3307)
>
> if I try and use wget to get a file from machine2 onto machine1 the command
> hangs and machine2 shows from netstat
> Active Internet connections (w/o servers)
> Proto Recv-Q Send-Q Local Address           Foreign Address         State
> tcp        0      0 sean:http               192.168.0.15:1027      
> SYN_RECV
>
> so the connection starts but doesn't complete
>
> any help much appreciated

We had a similar problem with a server, it turned out that it's NIC had 
dropped to half-duplex or something IIRC.  mii-diag is a useful tool to try 
in these situations I always find.  I don't know if it would make much 
difference, but try dropping all cards to the speed of the lowest card?

Am I talking rubbish here? :-)

Will.



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