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Installation and Maintenance Manual Nimbra 300 Series
Product Overview
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©2006 Net Insight AB, All rights reserved
Fast Ethernet Access Module
The service provided by the board is called Ethernet Transport Service (ETS).
ETS is a layer-2 service which handles any LAN service regardless of overlaying
protocol while still maintaining the guaranteed quality of service. Each tunnel
has independent configurable bandwidth in steps of 512 Kbps and it can be
configured for asymetric bandwidth on upstream and downstream traffic.
ETS maps an IEEE802.1Q VLAN tag to a dedicated ETS channel. Alternatively
untagged traffic can be mapped to a default VLAN and thereafter to a channel. A
maximum of 256 ETS channels can be supported in one Nimbra node. Any of
the 4096 IEEE 802.1Q VLAN tags can be used for tagging. There is however a
limit that allows only for simultaneous use of 1024 configured VLANs in a
Nimbra. A VLAN only needs to be unique at the card. That is, the same VLAN
can be used multiple times in the network as long as they are unique at the end
card. The same VLAN can therefore be used in two separate plug-in units in the
same node.
Diffserv and Ethernet user priority is supported. Prioritization is performed on
traffic within the ETS channel, which makes it possible to provide a
differentiated service to the customers. For customers utilizing equipment
without VLAN-tagging, diffserv prioritization can be used to separate the traffic.
Multicast is a way to transport data from one single source to many destinations
without any need to duplicate data on multiple channels. ETS Multicast service
is an Ethernet distribution service where the point-to-multipoint channel
functionality is utilized in order to perform multicast of uni-directional ETS
tunnels. The multicast channel can be terminated on several modules in the
Nimbra.
The front panel of the Fast Ethernet access module is shown below.
Figure 12. Front panel
The module provides eight Fast Ethernet ports (input and output). Refer to
chapter Specifications for data.
In normal operation the Power LED is lit and the Remove indicator LED is off.
The Request removal button is used when the Module should be replaced.
Status indicator LEDs provide information about the status of the respective
Ethernet ports. Refer to chapter Specifications for information about these
indicators.
To insert, connect or replace the Fast Ethernet access module, refer to chapter
Hardware Maintenance.