Hello All,
I'm seeing some odd behavior using the e100 driver for an intel ethernet
controller 82557/8/9 (revv 10). It appears as if the e100 driver is
handling interrupts generated by another device, though I am not certain
of this..
Using some printks, I see some odd packets received that are eventually
dropped somewhere up the stack. The packets usually look something like
this:
SrcAddr: 8.0.69.0 (bogus source ip)
DstAddr: 0.40.226.169 (bogus dest ip)
Protocol: 6
InputInt: 2
SrcPort: 20
DstPort: 8793
The src address and dest. address are entirely bogus, the protocol is not
always TCP, but I've seen it be icmp or udp. In addition, I see _nothing_
using tcpdump, which I also do not understand as I didn't think packets
were dropped before tcpdump. I've seen this behavior on multiple machines
using the same hardware, but haven't been able to make much sense of it.
These packets do not seem to affect the normal operation of the device,
i.e. it services correct ips/ports just as one would expect.
B/c I haven't been able to see the packets using tcpdump, I have been
thinking that the packets were generated by the box itself. The packets
appear to be constantly arriving, though it does not appear as if a packet
with the same src ip/dst ip arrives more than once, though I could be
wrong about this.
>From dmesg I see that the e100 is sharing irq 12.
e100: Intel(R) PRO/100 Network Driver, 3.4.8-k2-NAPI
e100: Copyright(c) 1999-2005 Intel Corporation
PCI: Found IRQ 12 for device 0000:01:04.0
PCI: Sharing IRQ 12 with 0000:00:02.0
PCI: Sharing IRQ 12 with 0000:00:1d.0
divert: allocating divert_blk for eth0
e100: eth0: e100_probe: addr 0xe8083000, irq 12, MAC addr 00:0E:B6:26:95:05
(This is the only other message I see mentioning irq 12)
serio: i8042 AUX port at 0x60,0x64 irq 12
(output of ethtool -e)
Offset Values
------ ------
0x0000 00 0e b6 26 95 05 1b 0d ff ff 01 02 01 47 ff ff
0x0010 ff ff ff ff 00 5f 70 00 86 80 7f 00 ff ff ff ff
0x0020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0030 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0040 ff ff ff ff ff ff 29 12 ff ff ff ff ff ff ff ff
0x0050 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0060 2c 01 00 40 06 41 ff ff ff ff ff ff ff ff ff ff
0x0070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff b3 b5
eth1 Link encap:Ethernet HWaddr 00:0E:B6:26:95:05
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3959305 errors:0 dropped:0 overruns:0 frame:0
TX packets:5337629 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:801040171 (763.9 MiB) TX bytes:797939498 (760.9 MiB)
Interrupt:12 Base address:0xd000 Memory:e8083000-e8084000
Notice that 0 errors are reported.. How could this be?
ethtool eth1
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: No
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 1
Transceiver: internal
Auto-negotiation: off
Supports Wake-on: g
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: yes
Any ideas? or debugging info greatly appreciated.
Thanks,
Shaw
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