On 2/5/07, Vijay Sankar <[EMAIL PROTECTED]> wrote:
On Monday 05 February 2007 11:55, J. Alfred Prufrock wrote:
>
> > tcpdump -netttvvvSXi interfacename
> >
> > should show you something like
>
> Here it is:
>
> Feb 05 11:59:06.601418 0:b:6:bc:7b:e ff:ff:ff:ff:ff:ff 0806 60: arp
> who-has 192.168.0.10 tell 24.145.134.116
> 0000: 0001 0800 0604 0001 000b 06bc 7b0e 1891 ...........<{...
> 0010: 8674 0000 0000 0000 c0a8 000a 1102 27b6 .t......@(....'6
> 0020: c0a8 6401 008a 00bb 0000 2046 4445 @(d....;.. FDE
This ARP request doesn't make sense. Your cable modem is asking for an
IP resolution on a different Ethernet segment than the address it
wants the reply sent back to. As Vijay pointed out, the device asking
for layer 2 / 3 address information should use the IP address on that
segment as the destination for the response.
> Feb 05 11:59:06.601500 0:20:78:1f:0:af 0:b:6:bc:7b:e 0806 60: arp reply
> 192.168.0.10 is-at 0:20:78:1f:0:af
> 0000: 0001 0800 0604 0002 0020 781f 00af c0a8 ......... x../@(
> 0010: 000a 000b 06bc 7b0e 1891 8674 1102 27b6 .....<{....t..'6
> 0020: c0a8 6401 008a 00bb 0000 2046 4445 @(d....;.. FDE
>
I checked the cable modem set up used by my kids and did not see this type of
behavior. I would have expected the tell address to be in the 192.168.0
subnet, not on the 24.x.x.x network. This to me indicates that there is a
subnet mask problem.
what happens if you try
dhcp NONE NONE NONE
in your hostname.dc0?
As per above, the tcpdump output suggests a more likely
misconfiguration of the cable modem rather than the BSD box.
DS
