Alcatel-Lucent 9500 MXC User Manual page 142

Chapter 3. 9500 MXC Nodes
Transport Channel Parameters
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Applies to RSTP protected ring/mesh networks using an external RSTP switch.
Vol. II-3-48
VLAN Mode
VLAN Mode supports four separate network interconnections - each is held
separate from the other. VLAN 1 is the same as for Mixed Mode, where
dedicated transport is provided for port 1 traffic. For Ports 2, 3 and 4, three
separate VLANs (VLANs 2, 3 and 4) are supported over C2, with internal VLAN
tagging of the packets ensuring correct end-to-end matching of ports over the
link.
VLAN Mode Port and Channel Assignment
Figure 3-32.
The two channels would normally be assigned on the same link, but can be used
to support separate links.
Selection is provided for channel type and capacity on a per-channel (C1, C2)
basis:
• Capacity Type provides selection of NxE1 or NxDS1 transport channels,
which must match the backplane bus configuration.
• Channel Capacity provides selection, per channel, of Ethernet capacity in
multiples of 2 Mbps (2.048 Mbps) or 1.5 Mbps (1.544 Mbps):
• For Nx2 Mbps the maximum capacity per channel is 98 Mbps.
Both channels can be sent over the same link to support two separate LAN
connections of up to 98 Mbps each, or used to support a ring network
one 98 Mbps channel to the west, the other to the east.
• For NxDS1 the maximum channel capacity for one channel is 100 Mbps.
Using both channels the maximum configurable capacity is 172 Mbps due
to a 112x circuit maximum within the DAC ES (112x1.544 Mbps).
Both channels can be sent over the same link to support two separate LAN
connections of up to 86 Mbps each, or used to support separate links in an
86 Mbps ring network.
• Where both channels are to be sent over the same link, the aggregate total
cannot exceed 150 Mbps for RAC 30 or RAC 40. For higher aggregate
capacities (to the aggregate maximum of both DAC ES channels) use RAC
3X.
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