Each 3Com ONcore Switch/Control provides the following functions:
Control plane:
– Support of ATM signaling (SVCs) according to ATM Forum V3.0 and V3.1
specifications.
– Switch-to-switch interface (SSI) based on an extension of the ATM Forum UNI
V3.0 as stated in the ATM Forum P-NNI framework
– Topology services and route computation based on TRS, with automatic bypass
of failed nodes and links only for SSI connections (TRS is an extension of
OSPF, Open Shortest Path First.)
– Interconnection of local ATM networks over an ATM WAN that provides a
permanent virtual path, allowing switched connections to be set up between end
systems on both sides of the WAN (VP tunneling)
– Internal SVC APIs to support node management and services over switched
ATM connections
– Support of permanent virtual path (VP) and permanent virtual channel (VC)
point-to-point connections
– Support of IP over ATM (RFC 1577) for node management and services
(Classical IP); PING message: 916 bytes maximum.
– Support of 802.3 LAN Emulation Client for node management and services
(LAN emulation). PING and TELNET messages: maximum length depends on
the maximum SDU size supported on the corresponding emulated LAN. See
Table 1-2 on page 1-15
1-8 ONcore ATM Switch/Control Module: Installation and User's Guide
