Additional Rules For Dac Es And Dac Ge - Alcatel-Lucent 9500 MXC User Manual

Additional Rules for DAC ES and DAC GE

1
When Ethernet traffic is to be sent over a DAC 155oM, the E1/DS1 circuits used must be configured in
the DAC 155oM plug-ins screen for TVT.
3DB 23063 ADAA - Rev 004 July 2007
3. Circuits are default connected for pass-through.
To assist your planning of circuits on a ring refer to Planning a Ring Network,
Appendix A.
The following applies to DAC ES and DAC GE when configured for an E1 or
DS1 channel type.
1. With a Bus Configuration set for E1 or DS1, Ethernet data is transported on
Nx2 Mbps (2.048 Mbps) or Nx1.5 Mbps (1.544 Mbps) circuits.
2. When assigning circuits to Channel C1 and/or Channel C2, they must be
linked in order of port number, that is, the lowest number port of the transport
channel at the local end must be linked to the lowest numbered port of the
transport channel at the remote DAC ES, the next lowest numbered port to the
next lowest numbered port, and so on; the circuits used must be in contiguous/
adjoining.
3. The linked transport channels must be configured with the same bandwidth at
each end of the radio path. For example if C1 of a DAC ES is configured for
20xE1 / 2Mbps, the DAC ES/GE at the remote end of the circuit (over one
hop or multiple hops) must also have C1 configured for 20xE1 / 2 Mbps. But
they can be displaced in port order, for example the 20 ports at one end could
range from 1 to 20, and at the other, from 11 to 30.
4. The DAC ES or DAC GE plug-ins must be circuit-configured directly to a
Link (RAC or DAC 155oM) at each end of the radio path. Ethernet data on
channels C1 and/or C2 carrying cannot be mapped to DAC E1 or DS1 tribs.
This is to ensure that the byte boundaries are maintained on the circuits
between DAC ES/GE modules - bytes sent on each Nx2 Mbps or Nx1.5 Mbps
channel must arrive intact and unshifted at the corresponding channel at the
remote DAC ES/GE
5. With one DAC ES up to 96x2 Mbps or 112x1.5 Mbps circuits (using both
channels) can be configured for Ethernet transport, or a mix of Ethernet and
TDM E1 or DS1 circuits can be configured up to the maximum of the
backplane bus; 100xE1 or 128xDS1.
6. With a DAC GE a total of 100xE1 or 127xDS1 circuits can be configured on
one channel, or over both channels, or a mix of Ethernet and TDM E1 or DS1
circuits can be transported up to the maximum of the bus; 100xE1 or
128xDS1.
7. A DAC ES can be installed at one end of the link and a DAC GE at the other.
8. When used with an external spanning-tree switch a DAC ES/GE should be
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9500 MXC User Manual
Vol. IV-9-13