RFC 877 (rfc877) - Page 2 of 2
Standard for the transmission of IP datagrams over public data networks
Alternative Format: Original Text Document
RFC 877 September 1983
Transmission of IP Datagrams Over Public Data Networks
2.2 Features of X.25 not discussed in this document are not used.
For example, interrupt packets and the D bit (indicating
end-to-end significance) are not used.
2.3 Negotiable features (facilities) of X.25 are allowed. For
example, sites are free to negotiate larger packet and window
sizes.
2.4 Some sites, such as CSNET sites, may attempt to open multiple
virtual circuits to a single site. Sites should attempt to
handle such incoming calls gracefully: transmit on the
additional circuits if possible and accept incoming datagrams
from them, but do not accept the CALL REQUEST, only to
immediately close the connection or ignore datagrams
transmitted on such circuits.
REFERENCE
[1] Comer, D.E. and Korb, J.T., "CSNET Protocol Software: The
IP-to-X.25 Interface", SIGCOMM Symposium on Communications
Architectures and Protocols, March 1983.
Korb