[Nfd-dev] tcpdump rejecting ndn packets

[Junxiao Shi]

Hi Ishita

What's exact tcpdump command line you are trying to use?

Yours, Junxiao

On Thu, Oct 3, 2019 at 4:29 PM Ishita Dasgupta via Nfd-dev <
nfd-dev at lists.cs.ucla.edu> wrote:

> Hi All,
> I have a docker that runs nfd 0.6.1 and has a route to its host over UDP
> and ethernet interface, say, eth1.
> I am trying to capture tcpdump (version 4.9.2) packets hoping to see NDN
> packets while ndnping runs in background. I can only see 0x0800 type
> packets but no 0x8624 packets.
> If I explicitly add filter to tcpdump to look for UDP port 6363 packets
> over eth1 and type 0x8624, I see: *tcpdump: expression rejects all
> packets*
> Interestingly if I am performing the same thing on the host machine, I can
> observe packets of type 0x8624.
> Has anybody come across this or has an idea why this happens?
>
> Regards,
> Ishita Dasgupta
>
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