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DHCP Filtering Commands

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Chapter 19 DHCP Filtering Commands DHCP Filtering functions to monitor the process of hosts obtaining IP addresses from DHCP Servers by configuring the desired port(s) as Trusted Port(s). Only the trusted ports can forward DHCP packets from DHCP servers. In this way, the switch can devoid of DHCP cheating attack which will cause network confusion and security problem. 19.1 ip dhcp filtering Description The ip dhcp filtering command is used to enable DHCP Filtering function. To disable please use no ip dhcp filtering command. Syntax ip dhcp filtering no ip dhcp filtering Command Mode Global Configuration Mode Example Enable the DHCP Filtering: T1600G-52TS(config)# ip dhcp filtering 19.2 ip dhcp filtering vlan Description The ip dhcp filtering vlan command is used to enable DHCP Filtering function in specified VLANs. To disable please use no ip dhcp filtering vlan command. Syntax ip dhcp filtering vlan vlan-range no ip dhcp filtering vlan vlan-range Parameter vlan-range -- The ID list of the VLAN desired to enable the DHCP Filtering feature, ranging from 1 to 4094, in the format of 1-3, 5. Command Mode Global Configuration Mode 126

Section	Page
Preface	13
Chapter 1 Using the CLI	15
1.1 Accessing the CLI	15
1.1.1. Logon by Telnet	15
1.1.2. Logon by SSH	16
1.2 CLI Command Modes	21
1.3 Security Levels	24
1.4 Conventions	25
1.4.1. Format Conventions	25
1.4.2. Special Characters	25
1.4.3. Parameter Format	25
Chapter 2 User Interface	26
2.1 enable	26
2.2 service password-encryption	26
2.3 enable password	27
2.4 enable secret	28
2.5 disable	29
2.6 configure	29
2.7 exit	29
2.8 end	30
2.9 history	30
2.10 history clear	31
Chapter 3 IEEE 802.1Q VLAN Commands	32
3.1 vlan	32
3.2 interface vlan	32
3.3 name	33
3.4 switchport general allowed vlan	33
3.5 switchport pvid	34
3.6 show vlan summary	35
3.7 show vlan brief	35
3.8 show vlan	35
3.9 show interface switchport	36
Chapter 4 Voice VLAN Commands	37
4.1 voice vlan	37
4.2 voice vlan aging	37
4.3 voice vlan priority	38
4.4 voice vlan mac-address	38
4.5 switchport voice vlan mode	39
4.6 switchport voice vlan security	40
4.7 show voice vlan	40
4.8 show voice vlan oui	41
4.9 show voice vlan switchport	41
Chapter 5 Etherchannel Commands	43
5.1 channel-group	43
5.2 port-channel load-balance	44
5.3 lacp system-priority	45
5.4 lacp port-priority	45
5.5 show etherchannel	46
5.6 show etherchannel load-balance	46
5.7 show lacp	47
5.8 show lacp sys-id	47
Chapter 6 User Management Commands	48
6.1 user name (password)	48
6.2 user name (secret)	49
6.3 user access-control ip-based	50
6.4 user access-control mac-based	51
6.5 user access-control port-based	51
6.6 user max-number	52
6.7 user idle-timeout	53
6.8 show user account-list	53
6.9 show user configuration	54
Chapter 7 System Log Commands	55
7.1 logging buffer	55
7.2 logging buffer level	55
7.3 logging file flash	56
7.4 logging file flash frequency	57
7.5 logging file flash level	57
7.6 logging host index	58
7.7 logging monitor	59
7.8 logging monitor level	59
7.9 clear logging	60
7.10 show logging local-config	60
7.11 show logging loghost	61
7.12 show logging buffer	61
7.13 show logging flash	62
Chapter 8 SSH Commands	63
8.1 ip ssh server	63
8.2 ip ssh version	63
8.3 ip ssh timeout	64
8.4 ip ssh max-client	64
8.5 ip ssh download	65
8.6 remove public-key	66
8.7 show ip ssh	66
Chapter 9 SSL Commands	67
9.1 ip http secure-server	67
9.2 ip http secure-server download certificate	67
9.3 ip http secure-server download key	68
9.4 show ip http secure-server	69
Chapter 10 MAC Address Commands	70
10.1 mac address-table static	70
10.2 mac address-table aging-time	71
10.3 mac address-table filtering	71
10.4 mac address-table max-mac-count	72
10.5 show mac address-table	73
10.6 show mac address-table aging-time	73
10.7 show mac address-table max-mac-count	74
10.8 show mac address-table interface	74
10.9 show mac address-table count	75
10.10 show mac address-table address	75
10.11 show mac address-table vlan	76
Chapter 11 System Configuration Commands	77
11.1 system-time manual	77
11.2 system-time ntp	77
11.3 system-time dst predefined	79
11.4 system-time dst date	80
11.5 system-time dst recurring	81
11.6 hostname	82
11.7 location	82
11.8 contact-info	83
11.9 ip address	83
11.10 ip address-alloc	84
11.11 reset	85
11.12 reboot	85
11.13 copy running-config startup-config	86
11.14 copy startup-config tftp	86
11.15 copy tftp startup-config	87
11.16 boot application	88
11.17 remove backup-image	88
11.18 firmware upgrade	89
11.19 ping	90
11.20 tracert	91
11.21 show system-info	91
11.22 show image-info	92
11.23 show boot	92
11.24 show running-config	93
11.25 show system-time	93
11.26 show system-time dst	93
11.27 show system-time ntp	94
11.28 show cable-diagnostics interface gigabitEthernet	94
11.29 show cpu-utilization	95
11.30 show memory-utilization	95
Chapter 12 IPv6 Address Configuration Commands	97
12.1 ipv6 enable	97
12.2 ipv6 address autoconfig	97
12.3 ipv6 address link-local	98
12.4 ipv6 address dhcp	99
12.5 ipv6 address ra	99
12.6 ipv6 address eui-64	100
12.7 ipv6 address	100
12.8 show ipv6 interface	101
Chapter 13 Ethernet Configuration Commands	102
13.1 interface gigabitEthernet	102
13.2 interface range gigabitEthernet	102
13.3 description	103
13.4 shutdown	103
13.5 flow-control	104
13.6 duplex	104
13.7 jumbo	105
13.8 speed	106
13.9 storm-control pps	106
13.10 storm-control	107
13.11 bandwidth	108
13.12 clear counters	108
13.13 show interface status	109
13.14 show interface counters	109
13.15 show interface configuration	110
13.16 show storm-control	110
13.17 show bandwidth	111
Chapter 14 QoS Commands	112
14.1 qos	112
14.2 qos dscp	112
14.3 qos queue cos-map	113
14.4 qos queue dscp-map	114
14.5 qos queue mode	115
14.6 qos queue weight	116
14.7 show qos interface	117
14.8 show qos cos-map	117
14.9 show qos dscp-map	118
14.10 show qos queue mode	118
14.11 show qos status	119
Chapter 15 Port Mirror Commands	120
15.1 monitor session destination interface	120
15.2 monitor session source interface	121
15.3 show monitor session	122
Chapter 16 Port Isolation Commands	123
16.1 port isolation	123
16.2 show port isolation interface	124
Chapter 17 Loopback Detection Commands	125
17.1 loopback-detection(global)	125
17.2 loopback-detection interval	125
17.3 loopback-detection recovery-time	126
17.4 loopback-detection(interface)	126
17.5 loopback-detection config	127
17.6 loopback-detection recover	128
17.7 show loopback-detection global	128
17.8 show loopback-detection interface	129
Chapter 18 ACL Commands	130
18.1 access-list create	130
18.2 mac access-list	130
18.3 access-list standard	131
18.4 access-list extended	132
18.5 rule	133
18.6 access-list policy name	134
18.7 access-list policy action	134
18.8 access-list bind acl	135
18.9 access-list bind(interface)	135
18.10 access-list bind(vlan)	136
18.11 show access-list	136
18.12 show access-list policy	137
18.13 show access-list bind	137
Chapter 19 DHCP Filtering Commands	138
19.1 ip dhcp filtering	138
19.2 ip dhcp filtering vlan	138
19.3 ip dhcp filtering trust	139
19.4 show ip dhcp filtering	139
19.5 show ip dhcp filtering interface	140
Chapter 20 MSTP Commands	141
20.1 debug spanning-tree	141
20.2 spanning-tree(global)	142
20.3 spanning-tree(interface)	142
20.4 spanning-tree common-config	143
20.5 spanning-tree mode	144
20.6 spanning-tree mst configuration	144
20.7 instance	145
20.8 name	146
20.9 revision	146
20.10 spanning-tree mst instance	147
20.11 spanning-tree mst	147
20.12 spanning-tree priority	148
20.13 spanning-tree tc-defend	149
20.14 spanning-tree timer	149
20.15 spanning-tree hold-count	150
20.16 spanning-tree max-hops	151
20.17 spanning-tree bpdufilter	151
20.18 spanning-tree bpduguard	152
20.19 spanning-tree guard loop	152
20.20 spanning-tree guard root	153
20.21 spanning-tree guard tc	153
20.22 spanning-tree mcheck	154
20.23 show spanning-tree active	154
20.24 show spanning-tree bridge	155
20.25 show spanning-tree interface	155
20.26 show spanning-tree interface-security	156
20.27 show spanning-tree mst	157
Chapter 21 IGMP Snooping Commands	158
21.1 ip igmp snooping(global)	158
21.2 ip igmp snooping(interface)	158
21.3 ip igmp snooping rtime	159
21.4 ip igmp snooping mtime	159
21.5 ip igmp snooping report-suppression	160
21.6 ip igmp snooping immediate-leave	160
21.7 ip igmp snooping drop-unknown	161
21.8 ip igmp snooping last-listener query-inteval	161
21.9 ip igmp snooping last-listener query-count	162
21.10 ip igmp snooping vlan-config	162
21.11 ip igmp snooping multi-vlan-config	164
21.12 ip igmp snooping querier vlan	165
21.13 ip igmp snooping querier vlan (general query)	165
21.14 ip igmp snooping max-groups	166
21.15 ip igmp profile	167
21.16 deny	168
21.17 permit	168
21.18 range	169
21.19 ip igmp filter	169
21.20 clear ip igmp snooping statistics	170
21.21 show ip igmp snooping	170
21.22 show ip igmp snooping interface	171
21.23 show ip igmp snooping vlan	171
21.24 show ip igmp snooping multi-vlan	172
21.25 show ip igmp snooping groups	172
21.26 show ip igmp snooping querier	173
21.27 show ip igmp profile	174
Chapter 22 MLD Snooping Commands	175
22.1 ipv6 mld snooping(global)	175
22.2 ipv6 mld snooping(interface)	175
22.3 ipv6 mld snooping rtime	176
22.4 ipv6 mld snooping mtime	176
22.5 ipv6 mld snooping report-suppression	177
22.6 ipv6 mld snooping immediate-leave	177
22.7 ipv6 mld snooping drop-unknown	178
22.8 ipv6 mld snooping last-listener query-inteval	178
22.9 ipv6 mld snooping last-listener query-count	179
22.10 ipv6 mld snooping vlan-config	179
22.11 ipv6 mld snooping multi-vlan-config	181
22.12 ipv6 mld snooping querier vlan	182
22.13 ipv6 mld snooping querier vlan (general query)	182
22.14 ipv6 mld snooping max-groups	183
22.15 ipv6 mld profile	184
22.16 deny	185
22.17 permit	185
22.18 range	186
22.19 ipv6 mld filter	186
22.20 clear ipv6 mld snooping statistics	187
22.21 show ipv6 mld snooping	187
22.22 show ipv6 mld snooping interface	188
22.23 show ipv6 mld snooping vlan	188
22.24 show ipv6 mld snooping multi-vlan	189
22.25 show ipv6 mld snooping groups	189
22.26 show ipv6 mld snooping querier	190
22.27 show ipv6 mld profile	190
Chapter 23 SNMP Commands	192
23.1 snmp-server	192
23.2 snmp-server view	192
23.3 snmp-server group	193
23.4 snmp-server user	194
23.5 snmp-server community	196
23.6 snmp-server host	196
23.7 snmp-server engineID	198
23.8 snmp-server traps snmp	199
23.9 snmp-server traps link-status	200
23.10 snmp-server traps	200
23.11 snmp-server traps mac	201
23.12 snmp-server traps vlan	202
23.13 rmon history	203
23.14 rmon event	204
23.15 rmon alarm	205
23.16 rmon statistics	206
23.17 show snmp-server	207
23.18 show snmp-server view	207
23.19 show snmp-server group	208
23.20 show snmp-server user	208
23.21 show snmp-server community	208
23.22 show snmp-server host	209
23.23 show snmp-server engineID	209
23.24 show rmon history	210
23.25 show rmon event	210
23.26 show rmon alarm	211
23.27 show rmon statistics	211
Chapter 24 ARP Commands	212
24.1 arp	212
24.2 clear arp-cache	212
24.3 arp timeout	213
24.4 show arp	213
24.5 show ip arp (interface)	214
24.6 show ip arp summary	214
Chapter 25 Static Routes Commands	216
25.1 interface vlan	216
25.2 interface loopback	216
25.3 switchport	217
25.4 shutdown	217
25.5 ip route	218
25.6 description	218
25.7 show interface vlan	219
25.8 show ip interface	219
25.9 show ip interface brief	220
25.10 show ip route	220
25.11 show ip route specify	221