[Nfd-dev] Changing the MTU size

[Junxiao Shi]

Hi Aboodi

MTU of Ethernet faces is read from the kernel. You can use ‘ip link’
command to change it before starting NFD.

I doubt you can go as low as 127. IPv4 would stop working at that MTU.

Yours, Junxiao

On Wed, Nov 6, 2019 at 04:05 Aboodi Ahed Hussein Ali <aboodi at student.usm.my>
wrote:

> Hi,
>
> I am trying to change the MTU size for the ethernet multicast face
> (remote=ether://[01:00:5e:00:17:aa]) to 127 but  I am not sure how to do
> that.
>
> I have tried to change the MTU of the multicast face with the below
> command, but I got "*Error 406 when creating face: Cannot create
> multicast Ethernet faces*"
> *The command: nfdc face create remote ether://[01:00:5e:00:17:aa] local
> dev://ens33 mtu 127*
>
> I have also tried to change the "MAX_NDN_PACKET_SIZE = 127" in the "~/
> *ndn-cxx/ndn-cxx/encoding/tlv.hpp*" but I get a fatal exception, "*encodes
> into 413 octets, exceeding the implementation limit of 127 octets*, when
> I run the "*nfd-start*".
>
> Could you please advise me on how to change it.
>
> Thank you,
> Ahed
>
>
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