Cisco MGX 8830, Руководство по настройке

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Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Chapter 1 Preparing for Configuration
Typical Topologies
Core Switch
Figure 1-1 shows the switch operating in a core switch topology.
Figure 1-1 Core Switch Topology
In the core switch topology, the switch works with other ATM switches to transfer broadband ATM
traffic from one ATM edge device to another. The core acts like a freeway, and the edge devices act like
freeway on-ramps.
Note
Typically, Cisco MGX 8850 (PXM45) and Cisco MGX 8950 switches are deployed in the network core,
whileCisco MGX 8830, Cisco MGX 8850 (PXM1E) and the Cisco MGX 8880 Media Gateway are
deployed at the network edge.
Typically, core edge nodes communicate with multiple external nodes over relatively slow broadband
trunks such as DS3, OC-3, and STM-1 trunks. The internal core node communicates with other core
nodes using relatively fast links such as OC-12, OC-48, and STM-16 trunks.
Multiservice Edge Aggregation
Figure 1-2 shows an MGX switch operating in a multiservice edge aggregation topology.
Figure 1-2 Multiservice Edge Aggregation Topology
Core ATM network
38410
Cisco
MGX 8850
(PXM45)
Broadband trunks
38411
Core ATM
network
ATM router
(Cisco or third-party)
ATM edge devices
(Cisco or third-party)
Voice
Frame data
ATM data
Cisco
MGX 8850
(PXM1)
UNI or
NNI
Cisco
MGX 8850
(PXM1E)