Network Design for a Dial NMS Case Study
Network Topology
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Basic Dial NMS Implementation Guide
Network Topology
Based on the dial NMS service definition in Table 3, the network engineers at THEnet defined
the network topology for the POPs and NOC.
Figure 5
Network Topology for One POP
An intranet WAN connects the two POPs together and routes traffic to the Internet. The NOC collects
management data from both POPs.
Figure 6
Network Topology for the NOC
An important design issue to consider is where to send syslog data. If syslog data is sent back to a
central site NOC, the syslog data must travel across WAN links. Estimate and monitor how much syslog
data is generated by each POP and the impact on the WAN links. Modem call records can add a
significant amount of traffic to syslog data.
38197
Cisco AS5800
access servers
Firewall
NOC
Intranet
WAN
Data
Control
Backbone
router
Backbone
router
Cisco 2511
OOB console server
AAA server
(for remote client users)
HP OpenView
CW 2000
AAA
UCD-SNMP
MRTG
38199
Cisco PIX
firewall
