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I realize that although I answered your question, this might be an XY problem: xyproblem.info I can't know if you need veth interfaces in what you want to achieve. veth is almost always used with network namespaces to be useful. This could be a programming API problem. (eg: using setsockopt to disable or enable IP_MULTICAST_LOOP on a socket).A.B– A.B2021-06-23 06:52:27 +00:00Commented Jun 23, 2021 at 6:52
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Also IP packets can be larger than Ethernet's MTU: that's what fragmentation is for.A.B– A.B2021-06-23 07:12:00 +00:00Commented Jun 23, 2021 at 7:12
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Thank you for the answer! I'm trying to understand it. Also I'm sorry if the question is an XY problem, and just to clarify, what I'm trying to achieve is high speed multicast UDP data transfer using a sender and receiver on the same host, and to achieve that, I read that it's best to have a large MTU size.Anand– Anand2021-06-23 07:23:24 +00:00Commented Jun 23, 2021 at 7:23
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