2005-09-13 2014-08-07 The Mandatory Extension Header range in the ULE Next-Header registry is used to allocate integer values in the range 0-255 (decimal). These values are used to identify mandatory extension headers. The registered value corresponds to the 16-bit Type value for the mandatory extension header or the specified protocol. The Optional Extension Header range in the ULE Next-Header registry is used to allocate integer values in the range 256-511 (decimal). These values are used to identify optional extension headers. The registered value corresponds to the 16-bit Type value that would be used for an optional extension header with a header length (H-LEN) of 1. The range 512-1535 is also assigned for Optional Extension Headers. IANA does not allocate numbers in this range. The values are derived from the combination of a registry entry in the range 256-511, and the corresponding H-LEN values specified in each registry entry . Specification Required Gorry Fairhurst 0 Test-SNDU 1 Bridged-SNDU 2 TS-Concat 3 PDU-Concat 4-128 Unassigned 129 LL_GSE_NCR EN 301 545-2 130 LL_RCS_L2S EN 301 545-2 131 LL_RCS_DCP TS 101 545-3 132 LL_RCS_1 EN 301 545-2 133 LL_RCS_TRANSEC_SYS EN 301 545-1 134 LL_RCS_TRANSEC_PAY EN 301 545-1 135 DVB-GSE_LLC ETSI TS 102 606-2 136-143 Unassigned 144-159 Reserved for Private Use 160-199 Unassigned 200 LL_RCS_FEC_FDT EN 301 790 V1.5.1 201-255 Unassigned Specification Required Gorry Fairhurst 256 Extension-Padding 1-5 257 Time-Stamp 3 258-449 Unassigned 450 LL_RCS_FEC_ADT 4 EN 301 790 V1.5.1 451 LL_CRC32 3 EN 301 790 V1.5.1 452-511 Unassigned Alexander Adolf mailto:alexander.adolf&condition-alpha.com 2013-12-18 Gorry Fairhurst mailto:gorry&erg.abdn.ac.uk 2013-02-06 Hans-Peter Lexow mailto:hlexow&stmi.com 2013-02-06 Laurence Duquerroy mailto:Laurence.Duquerroy&esa.int 2008-08-28