Re (2): freezing Ethernet crossover link.

[peasthope@shaw.ca]

Stan,

Date:	Sat, 12 Dec 2009 17:20:00 -0600 you wrote,
> Yes, it's not sending or receiving any packets.

My expanation was unclear.  The 0s come from ifconfig 
after data transmission.  Communication has always worked 
for a non-zero time prior to failure.  Presumeably ifconfig 
reports cumulative bytes.  This is a problem even before 
the link freezes.  Here is a better demonstration.

dalton:/home/peter# ping cantor
PING cantor.invalid (172.24.1.2) 56(84) bytes of data.
64 bytes from cantor.invalid (172.24.1.2): icmp_seq=1 ttl=32 time=1.18 ms
64 bytes from cantor.invalid (172.24.1.2): icmp_seq=2 ttl=32 time=2.23 ms
64 bytes from cantor.invalid (172.24.1.2): icmp_seq=3 ttl=32 time=1.51 ms
64 bytes from cantor.invalid (172.24.1.2): icmp_seq=4 ttl=32 time=1.39 ms
64 bytes from cantor.invalid (172.24.1.2): icmp_seq=5 ttl=32 time=2.51 ms
64 bytes from cantor.invalid (172.24.1.2): icmp_seq=6 ttl=32 time=2.51 ms
64 bytes from cantor.invalid (172.24.1.2): icmp_seq=7 ttl=32 time=3.38 ms
^C
--- cantor.invalid ping statistics ---
7 packets transmitted, 7 received, 0% packet loss, time 6010ms
rtt min/avg/max/mdev = 1.183/2.106/3.385/0.729 ms
dalton:/home/peter# ifconfig eth1
eth1      Link encap:Ethernet  HWaddr 00:1d:7e:00:e5:da
          inet addr:172.24.1.1  Bcast:172.24.1.255  Mask:255.255.255.0
          inet6 addr: fe80::21d:7eff:fe00:e5da/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)


> How many ethernet interfaces does the router
> have?  What is the make/model of each interface?

One PCI card and two Linksys 200M USB-Ethernet adapters.
The troublesome interface is a Linksys 200M.

dalton:/home/peter# lspci
   ...
01:08.0 Ethernet controller: Intel Corporation 82801BA/BAM/CA/CAM Ethernet Contr
oller (rev 01)
   ...
dalton:/home/peter# lsusb
   ...
Bus 001 Device 003: ID 13b1:0018 Linksys USB200M 10/100 Ethernet Adapter
Bus 001 Device 002: ID 13b1:0018 Linksys USB200M 10/100 Ethernet Adapter
   ...

> Are you sure it's a software problem?

No but while the Linksys 200M operates intermittenly, 
the driver should accumulate non-zero bytes. 

> Have you swapped in a new crossover cable?  Have you tried
> swapping the 'flaky' NIC out?

Good idea.  Tomorrow Cantor can use the other 
200M and cable.

Thanks,          ... Peter E.


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