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Labeling the Cables
4.
If each of the three external uplinks is not connected as described in Note #4, a single point of failure
Caution
could cause a traffic interruption.
5.
Caution
If both DNS servers become unreachable, a traffic interruption will occur.
Note
Ethernet ports on the rear panels of some EMS and CA units are labeled ETH0, ZNB0, ZNB1, and so
forth. On some units these ports are labeled hme0, qfe0, qfe1, and so forth. Regardless of the labeling
style, the Cisco BTS 10200 Softswitch functionality is the same.
Labeling the Cables
Make sure that you have all the cables labeled before you begin. Label the cables according to the
procedure in
Connect Ethernet Cables To EMS and CA Units
Follow these steps to connect the Ethernet cables. Refer to
units in the rack.
Step 1
Obtain the 10 Ethernet cables needed for connections between the rear panel of the Element
Management Systems (EMS A and EMS B) and the two Cisco 2924M Ethernet Switches (Hub A and
Hub B). These cables are listed in
Connect the 10 Ethernet cables to the ports on the rear panel of the EMS units as listed in
Step 2
Appendix B: Cable List, page
Figure 3
Note
4
C I S C O C O N F I D E N T I A L
To support full system redundancy, it is necessary to connect each of the three
Cisco BTS 10200 Softswitch external uplinks to a different network with diverse routing paths to
the related external network elements (NEs) and services (such as OSS, DNS, media gateways, and
announcement servers).
To ensure redundancy of the DNS lookup function in the event of a network outage, it is strongly
recommended to have two DNS units reachable via separate networks with diverse routing paths.
Appendix A: Cable Labeling, page
shows the rear view of the EMS. On the EMS, use ports ETH0 and ZNB0 through ZNB3.
Figure 3
and
Figure 4
22.
Table 1
in
Appendix B: Cable List, page
23.
are not to scale.
Figure 1 on page 2
to identify the specific
23.
Table 1
in
OL-2906-01