[riot-notifications] [RIOT-OS/RIOT] tests/gnrc_tcp_*: #2 not working on 6Lo-based boards (#10956)

Martine Lenders notifications at github.com
Wed Feb 6 14:44:53 CET 2019


> GNRC_TCP MSS is configured to be aligned with the minimum IPv6 MTU of 1280 byte via a define.
`#ifndef GNRC_TCP_MSS #ifdef MODULE_GNRC_IPV6 #define GNRC_TCP_MSS (1220U) /**< If IPv6 is used. Get MSS = 1280 - IPv6 Hdr - TCP Hdr = 1220 */ #else #define GNRC_TCP_MSS (576U) /**< Default MSS */ #endif #endif`
The TCP MSS is therefore independent from the 6LoPAN layer.

Okay. I believe that is in line with the [TCP over constrained node networks draft](https://tools.ietf.org/html/draft-ietf-lwig-tcp-constrained-node-networks-04#section-4.1.1).

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