Network Speed

[Ian]

I've run into a networking issue on my home network where one box is 
extremely slow on downloading and just in general browsing.  The slow 
box is  a Dell XPS 400 running Fedora Core 5.  I have a Dell Inspiron 
8600 running RHEL 4 WS which has no speed issues at all.  They are both 
plugged into the same SOHO firewall which is connected into a cable 
modem.  I'm pretty much at a loss, so any ideas would be a great help..

Here are some of the details. 

Broadband speed test at Speak Easy shows:
*Core 5  *          =     Down 11.6 KB/sec transfer rate  /  UP 41.5 
KB/sec transfer rate
*RHEL4 WS  *  =     Down 383 KB/sec transfer rate  /  UP 43.3 KB/sec 
transfer rate

*Core 5 *=  ethtool eth0
Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: umbg
        Wake-on: g
        Current message level: 0x00000007 (7)
        Link detected: yes


*RHEL4 WS*    = ethtool eth0
Settings for eth0:
        Supported ports: [ MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  1000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        Current message level: 0x000000ff (255)
        Link detected: yes

*Core 5 =  *dmesg |grep eth0
e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
e1000: eth0: e1000_watchdog_task: NIC Link is Up 100 Mbps Full Duplex
e1000: eth0: e1000_watchdog_task: 10/100 speed: disabling TSO
eth0: no IPv6 routers present

*RHEL4 WS =  *dmesg |grep eth0
divert: allocating divert_blk for eth0
eth0: Broadcom 4400 10/100BaseT Ethernet 00:0d:56:ec:76:56
b44: eth0: Link is up at 100 Mbps, full duplex.
b44: eth0: Flow control is on for TX and on for RX.
eth0: no IPv6 routers present


Thanks,
Ian