Nortel Networks Recording Equipment 1 사용자 설명서
Voice over Wireless LAN Solution Guide
v1.0
December 2005
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Page 17
the ES PSU 10 can provide up to 75 W of power to PoE devices through the ES 460-24T-POE.
This means that when running on battery or redundant DC power, only about 10 or 11 APs can
be powered. If the deployment of the network calls for more than 10 APs on any ES 460-24T-
POE switch, Nortel highly recommends the NES as the external power supply option instead of
the ES PSU 10. The NES can provide a full 200 W to end devices from a battery or secondary
power source in the event that the ES 460-24T-POE loses its AC power source. Therefore, the
NES offers full redundancy to 24 powered AP 2330s even in the event of loss of power.
This means that when running on battery or redundant DC power, only about 10 or 11 APs can
be powered. If the deployment of the network calls for more than 10 APs on any ES 460-24T-
POE switch, Nortel highly recommends the NES as the external power supply option instead of
the ES PSU 10. The NES can provide a full 200 W to end devices from a battery or secondary
power source in the event that the ES 460-24T-POE loses its AC power source. Therefore, the
NES offers full redundancy to 24 powered AP 2330s even in the event of loss of power.
2.2.2.2
Physical layer interconnections
The WSS 2380 has four dual PHY gigabit interfaces. You can use either the integrated
1000Base-T (copper) port or the Gigabit Interface Connector (GBIC) slot for fiber connectivity.
The only GBIC currently supported is a 1000Base-SX multimode GBIC with SC interface. You
can group all four ports into a MultiLink Trunk (MLT); the preferable mode of connection to an
Ethernet Routing Switch (ERS) 8600 core is to leverage SMLT on the ERS 8600 by connecting
two WSS 2380 ports to each ERS 8600. See Figure 6. All ports are active in this configuration, so
this represents high-throughput, highly resilient mode of network connectivity.
1000Base-T (copper) port or the Gigabit Interface Connector (GBIC) slot for fiber connectivity.
The only GBIC currently supported is a 1000Base-SX multimode GBIC with SC interface. You
can group all four ports into a MultiLink Trunk (MLT); the preferable mode of connection to an
Ethernet Routing Switch (ERS) 8600 core is to leverage SMLT on the ERS 8600 by connecting
two WSS 2380 ports to each ERS 8600. See Figure 6. All ports are active in this configuration, so
this represents high-throughput, highly resilient mode of network connectivity.
Note that while this document refers to MLT on the WSS 2300, the underlying link aggregation
technology is 802.3ad.
technology is 802.3ad.
Figure 6: WSS 2380 using ERS 8600 SMLT
If the WSS 2380 is connected to an ES 470-24/48T, Business Policy Switch (BPS), or ES 460
equipped with a BPS-2000-2GE Media Dependent Adapter (MDA), then you must disable auto
negotiation on the WSS 2380. If you do not disable auto negotiation, the link will not be
established. When connecting to other ES products, including the BPS or ES 460 equipped with a
BS450-1SX/SR MDA, you must enable auto negotiation. The ERS 8600 does not have any auto
negotiation issues on gigabit fiber ports, so you must enable auto negotiation on the WSS 2380
when it is connected to an ERS 8600.
equipped with a BPS-2000-2GE Media Dependent Adapter (MDA), then you must disable auto
negotiation on the WSS 2380. If you do not disable auto negotiation, the link will not be
established. When connecting to other ES products, including the BPS or ES 460 equipped with a
BS450-1SX/SR MDA, you must enable auto negotiation. The ERS 8600 does not have any auto
negotiation issues on gigabit fiber ports, so you must enable auto negotiation on the WSS 2380
when it is connected to an ERS 8600.
The WSS 2360 has six PoE ports and two regular network ports, all of which are 10/100 physical
ports. Because of this combination, the most recommended network connectivity option for the
WSS 2360 is to aggregate the two network ports into an MLT and connect to SMLT on an ERS
8600. The other six ports remain reserved for direct device connectivity requiring PoE, most likely
2330 APs.
ports. Because of this combination, the most recommended network connectivity option for the
WSS 2360 is to aggregate the two network ports into an MLT and connect to SMLT on an ERS
8600. The other six ports remain reserved for direct device connectivity requiring PoE, most likely
2330 APs.
A WSS 2350 is usually connected through its one network port to an L2 switch in the branch. One
AP can be directly connected to the other PoE port or indirectly connected through the L2 switch
as a DAP. Another variation that adds a little more resiliency is to aggregate both ports as an
AP can be directly connected to the other PoE port or indirectly connected through the L2 switch
as a DAP. Another variation that adds a little more resiliency is to aggregate both ports as an