
ArcLight Hub User’s Guide
Component Operating Procedures
5-80 1081006
Rev.
001
5.17 Ethernet
Switches/Routers
5.17.1 Overview
COTS (Cisco) Ethernet switches are used in the ArcLight Hub
subsystem to provide ease of connectivity and Ethernet switching. In a
typical installation at least two Ethernet switches are used, one to
provide typical 10.1.1.0/24 Hub Ethernet segment, and one to provide
the customer network interface segment, typically 10.1.2.0/24.
Additionally, the same switch that provides the 10.1.1.0/24 segment is
also used to provide 192.168.10.0/24 segment for MCD/RtNMS direct
connectivity.
All the Common Components Hub switching is performed on two Cisco
3560 switches running in a redundant configuration. The 3560’s are
segmented into several VLANs to support the individual routing
domains. Each routing domain is separately addressed and connected
to each support system for that function in the network. All systems,
with sufficient number of 10/100BaseT Ethernet ports, are dual homed
(connected to two redundant switches) on the set of switches to protect
against downtime in the event of a failure. When this is not possible,
e.g. FLM only has one 10/100BaseT Ethernet port; a port shall be
reserved and labeled on the redundant Ethernet switch to allow for
quick and easy manual connection change in case of primary switch
failure or the component failure.
The cables leading to the Ethernet ports on the switches are usually
color coded according to LAN segments (red, blue, and yellow).
Figure 5-48. Ethernet Switch
Figure 5-49 and Figure 5-50 show the front and rear panels of the
Ethernet switch.
Figure 5-49. Front Panel Indicators
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