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User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)

Description of problem:
I am using 2.6.9-27 x86_64 and ia64 kernels, testing OpenIB.  IPoIB is working in general, but tcpdump does not work with IPoIB.

# tcpdump -i ib0
tcpdump: ioctl: Value too large for defined data type

strace says:

ioctl(3, SIOCGIFINDEX, {ifr_name="lo", ifr_index=1}) = 0
ioctl(3, SIOCGIFHWADDR, {ifr_name="ib0", ???}) = -1 EOVERFLOW (Value too large f
or defined data type)
close(3)                                = 0
write(2, "tcpdump: ", 9tcpdump: )                = 9
write(2, "ioctl: Value too large for defin"..., 44ioctl: Value too large for def
ined data type) = 44


Version-Release number of selected component (if applicable):
tcpdump-3.8.2-9.RHEL4

How reproducible:
Always

Steps to Reproduce:
1. modprobe ib_ipoib
2. tcpdump -i ib0
3.
  

Actual Results:  command failed

Expected Results:  packet dump

Additional info:

none