RAD Data comm IPmux-16 Mode of Operation, Multibundling, Internal Cross Connect, QoS, Timing

Chapter 1 Introduction IPmux-16Installation and Operation Manual

tolerance at the receiving end, causing buffer underflows and errors to occur. IPmux-16 supports VLAN tagging and priority.

Mode of Operation

IPmux-16 can operate in three different modes:

•Unframed full E1/T1 over UDP over IP over Ethernet

•Fractional E1/T1 over UDP over IP over Ethernet

•Fractional with CAS over UDP over IP over Ethernet.

Multibundling

A bundle is a group of timeslots originating from a specific E1 or T1 channel. Up to 31 bundles per E1 channel and 24 bundles per T1 channel can be defined for transport over the network. Each bundle can contain 1 to 24/31 timeslots (T1/E1 respectively).

Two network topologies are supported:

•Star (point-to-multipoint):Multiple remote locations transport one bundle each to a central site which is capable of grooming the bundles into its E1 or T1 channel.

•Mesh: Any-to-any connectivity is supported at the bundle (DS0) level.

Internal Cross Connect

IPmux-16 allows an internal cross connect of bundles between its E1/T1 ports.

QoS

QoS support:

•Labeling IP level priority (ToS)

•VLAN tagging and priority labeling according to IEEE 802.1 p&q

The user can configure the ToS (Type of Service) of the outgoing IP packets. This allows an en-route layer-3 router or switch, which supports ToS, to give higher priority to IPmux-16 traffic for delay-sensitive and secure applications. IPmux-16 allows you to configure the WHOLE ToS byte field, since different vendors may use different bits to tag packets for traffic prioritization. This also enables you to work according to various RFC definitions (for example RFC 2474, RFC 791). The user can also configure VLAN priority bits for Level 2 Priority.

Timing

Available timing modes are:

•Loopback

The E1 or T1 Transmit clock is derived from the E1/T1 Receive clock.

•Adaptive

In this mode, the E1 or T1 TX clock is regenerated using the Adaptive method. In this method, the fill level of the buffer receiving packets is monitored. If the

1-4 Overview