…ppropriate ICMP, e.g., "packet too big" (IPv4 fragmentation needed and DF set [ RFC792 ] or IPv6 packet too big [ RFC4443 ]), when trying to send a packet to the egress, as it would for any interface. Tunnels have a tunnel MTU - the largest message that can transit that tunnel, j…

…+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type and code are well-known values, defined in [ RFC792 ]. The codes have meaning only within a particular type, they are not orthogonal. The next 32 bit word is usually defined for the specific type, sometimes it is unused. For many types, the data…

… cannot be bypassed by software misconfiguration. 9. ICMPv8 ICMPv8 extends ICMP RFC792 to support 64-bit IPv8 addresses. ICMPv8 is backward compatible with ICMPv4. Both versions MUST be supported simultaneously. ICMPv8 carries full 64-bit IPv8 addresses in Echo, Destination Unrea…

…e event. For | | | | | ICMP or ICMPv6 events, this MUST be | | | | | the ICMP [ RFC792 ] or ICMPv6 | | | | | [ RFC4443 ] code. For other events, | | | | | the contents are undefined. | | | | | | | ae-transport-flags | C | U | Bit flags describing the transport | | | | | used to s…

…t receives an unreachable ICMP error message (ICMP message codes 0, 1, 6 or 7 [ RFC792 ]). The host tries all its attached links in a round robin fashion. This has been implemented successfully for some IPv6 hosts, to circumvent exactly this problem. In terms of this example, HOS…

…failures may be affected by the use of a PEP. For example, PING (described in [ RFC792 ] and [ RFC2151 ]) is often used to test for connectivity. But, because PING is based on ICMP instead of TCP (i.e., it is implemented using ICMP Echo and Reply commands at the network layer), i…

…failures may be affected by the use of a PEP. For example, PING (described in [ RFC792 ] and RFC2151 ]) is often used to test for connectivity. But, because PING is based on ICMP instead of TCP (i.e., it is implemented using ICMP Echo and Reply commands at the network layer), it …

…Text deleted as they are not necessary, since the correct references to ICMPv4 (RFC792) and ICMPv6 (RFC2460) are already present. See the discussions here (https://mailarchive.ietf.org/arch/msg/tcpm/OkmxfectGJJ92thymY-CS375fzQ/). RFC 5931 , "Extensible Authentication Protocol (EA…

…Text deleted as they are not necessary, since the correct references to ICMPv4 (RFC792) and ICMPv6 (RFC2460) are already present. See the discussions here (https://mailarchive.ietf.org/arch/msg/tcpm/OkmxfectGJJ92thymY-CS375fzQ/). RFC 5931 , "Extensible Authentication Protocol (EA…