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Based on the dial NMS service definition in Table 3, the network engineers at THEnet defined
the network topology for the POPs and NOC.
Cisco AS5800
access servers
Data
An intranet WAN connects the two POPs together and routes traffic to the Internet. The NOC collects
management data from both POPs.
Cisco PIX
firewall
HP OpenView
CW 2000
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.
Backbone
router
Backbone
router
Cisco 2511
OOB console server
AAA server
(for remote client users)
Control
UCD-SNMP
MRTG
AAA
NOC
Firewall
Intranet
WAN
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