Dell 3-DNS Administrator Manual
Download Administrator's manual of Dell 3-DNS Network Router for Free or View it Online on All-Guides.com.
Brand: Dell
Category: Network Router
Type: Administrator's manual for Dell 3-DNS
Pages: 165 (1.98 Mb)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
Glossary
3-DNS
®
Administrator Guide Glossary-11
topology record
A topology record specifies a score for a local DNS server location endpoint
and a virtual server location endpoint.
topology score
The topology score is the weight assigned to a topology record when the
3-DNS Controller is filtering the topology records to find the best virtual
server match for a DNS query.
topology statement
A topology statement is a collection of topology records.
traceroute
Traceroute is the utility that the hops factory uses to calculate the total
number of network hops between a local DNS server and a specific data
center.
TTL (Time to Live)
The TTL is the number of seconds for which a specific DNS record or
metric is considered to be valid. When a TTL expires, the server usually
must refresh the information before using it again.
unavailable
The unavailable is a status used for data center servers and virtual servers.
When a data center server or virtual server is unavailable, the 3-DNS
Controller does not use it for load balancing.
unknown
The unknown status is used for data center servers and virtual servers.
When a data center server or virtual server is new to the 3-DNS Controller
and does not yet have metrics information, the 3-DNS Controller marks its
status as unknown. The 3-DNS Controller can use unknown servers for
load balancing, but if the load balancing mode is dynamic, the 3-DNS
Controller uses default metrics information for the unknown server until it
receives live metrics data.
up
The up status is used for data center servers and virtual servers. When a data
center server or virtual server is up, the data center server or virtual server is
available to respond to name resolution requests.
virtual server
A virtual server is a specific combination of a virtual IP address and virtual
port, and is associated with a content site that is managed by a BIG-IP,
EDGE-FX Cache, or host server.