REIJS@SURFNET.NL (01/30/91)
Hello all of you,
In the near future we would like to use NSAP-addresses within our network.
For designing the format of the NSAP, I would like to know what you think
about the following format of the NSAP:
AFI: 38 or 39 (2 digits)
IDI: DCC (3 digits)
CFI + CDI: (4 digits) {these are allocated by National Standard
Organization: Country Format Identifier (1 digit)
and Country Domain Identifier (3 digits)}
SFI: (1 digit) {allocated by local organization: SURFnet Format
Identifier}
SDI: (4 digits) {allocated by local organization: SURFnet Domain
Identifier}
LDI: (1 digit) {allocated by local site: Local Domain Identifier}
ECMA: (3-9 octets, 8-23 digits) {The ECMA-117 recommendation [also used by
DECNET]}
When using binary encoding this will lead to a 17 octet long NSAP address
(when using AFI=39).
E.g (abstract syntax):
39 825 /1100 0 0123 2 1122 334455667788 99
Encoding in binary will be:
39825F110001232112233445566778899
My questions to you are:
- did I use the standard in a wrong way?
- does this format give problems in existing equipment (e.g. DECNET)?
- I read somewhere (I though the new IS-IS) that the length of the
recommended scheme of 'ECMA-117' will be changed to 2 (subnet-id),
0-8 (subnet-adr), 1 octets (selector). Is this correct???
Thanks for evaluating the above scheme.
All the best,
Victor