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博達(dá)交換機(jī)VLAN隔離配置[S3224]( 二 )

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switchport;pvid;20
switchport;trunk;vlan-allowed;20,24
switchport;trunk;vlan-untagged;20,24
!
interface;FastEthernet0/21
switchport;mode;trunk
switchport;pvid;21
switchport;trunk;vlan-allowed;21,24
switchport;trunk;vlan-untagged;21,24
!
interface;FastEthernet0/22
switchport;mode;trunk
switchport;pvid;22
switchport;trunk;vlan-allowed;22,24
switchport;trunk;vlan-untagged;22,24
!
interface;FastEthernet0/23
switchport;mode;trunk
switchport;pvid;23
switchport;trunk;vlan-allowed;23-24
switchport;trunk;vlan-untagged;23-24
!
interface;FastEthernet0/24;;;;//端口24，本例中作為上行口
switchport;mode;trunk;//設(shè)為trunk模式
switchport;pvid;24;;;;;;;//數(shù)據(jù)入端口時(shí)加上vlan24的tag
switchport;trunk;vlan-untagged;all;;//數(shù)據(jù)出端口時(shí)去除所有tag（tag1~tag24）
!;//注重trunk口時(shí)默認(rèn)屬于所有tag的！
vlan;1-24;;;;;//建立1~24個(gè)vlan，默認(rèn)情況下只有vlan1，其他需要增加，且這個(gè)操作時(shí)第一步要做的！
!
!說(shuō)明，本例子完成之后，interface;f0/1~f/23分別屬于不同的vlan，相互之間是不能互通的（不考慮使用三層路由轉(zhuǎn)發(fā)的情況），但此時(shí)這23個(gè)端口都能與上行口interface;f0/24口通訊！

此時(shí)的vlan分配情況為：
Switch_config#show;vlan
VLAN;Status;;Name;;;;;Ports
----;-------;--------------------------------;---------------------------------
1;;;;Static;;Default;;F0/1,;F0/24
2;;;;Static;;VLAN0002;F0/2,;F0/24
3;;;;Static;;VLAN0003;F0/3,;F0/24
4;;;;Static;;VLAN0004;F0/4,;F0/24
5;;;;Static;;VLAN0005;F0/5,;F0/24
6;;;;Static;;VLAN0006;F0/6,;F0/24
7;;;;Static;;VLAN0007;F0/7,;F0/24
8;;;;Static;;VLAN0008;F0/8,;F0/24
9;;;;Static;;VLAN0009;F0/9,;F0/24
10;;;Static;;VLAN0010;F0/10,;F0/24
11;;;Static;;VLAN0011;F0/11,;F0/24
12;;;Static;;VLAN0012;F0/12,;F0/24
13;;;Static;;VLAN0013;F0/13,;F0/24
14;;;Static;;VLAN0014;F0/14,;F0/24
15;;;Static;;VLAN0015;F0/15,;F0/24
16;;;Static;;VLAN0016;F0/16,;F0/24
17;;;Static;;VLAN0017;F0/17,;F0/24
18;;;Static;;VLAN0018;F0/18,;F0/24
19;;;Static;;VLAN0019;F0/19,;F0/24
20;;;Static;;VLAN0020;F0/20,;F0/24
21;;;Static;;VLAN0021;F0/21,;F0/24
22;;;Static;;VLAN0022;F0/22,;F0/24
23;;;Static;;VLAN0023;F0/23,;F0/24
24;;;Static;;VLAN0024;F0/1,;F0/2,;F0/3,;F0/4,;F0/5
F0/6,;F0/7,;F0/8,;F0/9,;F0/10
F0/11,;F0/12,;F0/13,;F0/14,;F0/15
F0/16,;F0/17,;F0/18,;F0/19,;F0/20
F0/21,;F0/22,;F0/23,;F0/24簡(jiǎn)單分析一下工作流程：
1、f0/2和f0/3之間的通信，
Switch_config#show;vlan;inter;f0/2
Interface;;;;VLAN
Name;Property;PVID;Vlan-Map;uTagg-VLan-Map
--------------------;--------;----;----------------;----------------
FastEthernet0/2;;;;;;Trunk;;;;2;;;;2,24;;;;;2,24

Switch_config#show;vlan;inter;f0/3
Interface;;;;VLAN
Name;Property;PVID;Vlan-Map;uTagg-VLan-Map
--------------------;--------;----;----------------;----------------
FastEthernet0/3;;;;;;Trunk;;;;3;;;;3,24;;;;;3,24
從中我們可以看到，f0/2是屬于vlan2和vlan的，且pvid為2，那就是說(shuō)普通數(shù)據(jù)（非802.1q）進(jìn)入這個(gè)端口時(shí)會(huì)被打上tag2，然后zhge報(bào)通過(guò)交換機(jī)到達(dá)f0/3時(shí)，端口三是指能夠untagvlan3和vlan24的的tag的，這個(gè)可以從上面的show;vlan;inter;f0/3看出來(lái)，所以f0/3無(wú)法識(shí)別從f0/2過(guò)來(lái)的數(shù)據(jù)包！反過(guò)來(lái)也是一樣的！
換句話說(shuō)就是實(shí)現(xiàn)了vlan2和vlan3的隔離！
2、f0/2和f0/24之間的通信，
Switch_config#show;vlan;inter;f0/2
Interface;;;;VLAN
Name;Property;PVID;Vlan-Map;uTagg-VLan-Map
--------------------;--------;----;----------------;----------------
FastEthernet0/2;;;;;;Trunk;;;;2;;;;2,24;;;;;2,24
Switch_config#show;vlan;inter;f0/24

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