Virtual Ports - Vocality V100 Technical Manual

C H A P T E R 4 F E A T U R E S
is discussed later in the UDP relay section. The DBA and Destination fields are not used for the Ethernet
port. The IP field is be fixed at NUM (for standard numbered packet support) for the Ethernet port.
Example of IP Subnet configuration for Ethernet
With just a single IP network entity configured on the Ethernet port, the V100 can communicate with IP
stations on the locally connected network, but will not yet route IP traffic over the V100 network. Further
network entries must be configured for this – however, unlike traditional wide-area network routers, IP
networks are not configured directly for the aggregate ports to the V100 network as this would by-pass
the V100 bandwidth management facilities provided by the V100 data router. Instead, the concept of
virtual ports (see below) is used to represent the wide area networks of the IP router.

4.13.4 Virtual Ports

IP connectivity is provided across the V100 network as a set of point-to-point connections between V100s
with integrated IP capability. The IP router forwards traffic between the Ethernet ports of pairs of V100s
via the V100 network. A point-to-point connection between the IP router on a V100 and the corresponding
IP router on a peer V100 is represented by a virtual port, which works in the same way as any other
V100 channel but does not have a physical connector.
The IP router is fully integrated with the other V100 services. It interfaces to the V100 Data Router for
interconnectivity across the V100 network. The V100 Data Router is built on the concept of connecting
peer logical ports across the V100 network via aggregate links. Each tributary has a port number that is
unique within the V100 network. The diagram below shows how the integrated IP router interfaces with
the V100 Data Router via these tributary ports, and includes a voice card for comparison.
V100 Versatile Multiplexer Technical Manual Version 2.2
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