Which measure does ISIS use to avoid sending traffic with a wrong MTU configuration?
ISIS DOES NOT PROTECT FROM MTU MISMATCH.
MTU VALUE IS COMMUNICATED IN ISIS SEQUENCE NUMBER PDUS (SNP), AND ISIS ADJACENCY IS NOT ESTABLISHED IF AU MTU MISMATCH IS DETECTED.
ISIS USES PATH MTU DISCOVERY AS SPECIFIED IN RFC 1063.
ISIS USES PADDING OF HELLO PACKETS TO FRILL MTU.
