CLI Example
41
4
Storm Control
A traffic storm is a condition that occurs when incoming packets flood the LAN, which creates
performance degradation in the network. The Unified Switch’s Storm Control feature protects
against this condition.
The Unified Switch provides broadcast, multicast, and unicast storm recovery for individual
interfaces or for all interfaces.
Unicast Storm Control protects against traffic whose MAC addresses are not known by the
system.
For broadcast, multicast, and unicast storm control, if the rate of traffic ingressing on an
interface increases beyond the configured threshold for that type, the traffic is dropped.
To configure storm control, you’ll enable the feature for all interfaces or for individual
interfaces, and you’ll set the threshold (storm control level) beyond which the broadcast,
multicast, or unicast traffic will be dropped.
Configuring a storm-control level also enables that form of storm-control. Disabling a storm-
control level (using the “no” version of the command) sets the storm-control level back to
default value and disables that form of storm-control. Using the “no” version of the “storm-
control” command (not stating a “level”) disables that form of storm-control but maintains the
configured “level” (to be active next time that form of storm-control is enabled).
CLI Example
Example #1: Set Broadcast Storm Control for All Interfaces
(DWS-3024) #config
(DWS-3024) (Config)#storm-control broadcast ?
all Configure storm-control features for all ports.
(DWS-3024) (Config)#storm-control broadcast all ?
<cr> Press Enter to execute the command.
level Configure storm-control thresholds.
(DWS-3024) (Config)#storm-control broadcast all level ?
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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
