2台48口华为二层交换机级联怎么划分两个或三个vlan，是在一台上划，还是两台都要划，trunk是必设的 华为交换机 2层 3层VLAN互联的问题。
\u534e\u4e3a\u4e8c\u5c42\u4ea4\u6362\u673aS2700\u5982\u4f55\u5212\u52063\u4e2aVLAN\uff0c3\u4e2aVLAN\u5171\u540c\u4e0a\u7f51\uff1f\u9700\u8981\u8def\u7531\u5668\u7684
\u4e8c\u5c42\u5212\u52063\u4e2avlan \u662f\u53ef\u4ee5\u7684
\u547d\u4ee4\u5982\u4e0b\uff1a
vlan batch 10 20 30
\u8fdb\u5165\u76f8\u5e94\u7aef\u53e3 \u5212\u5165\u76f8\u5e94VLAN
port link-type access/trunk/hypbrid
port default vlan XX \u6216port trunk allow-pass vlan xx /all
47\u53e3\u63a5\u8def\u7531\uff0c\u800c\u4e1447\u53e3\u662ftrunk\u6a21\u5f0f\u3002\u8fd9\u6837\u7684\u8bdd\uff0c\u5176\u5b9e\u4e09\u5c42\u4ea4\u6362\u673a\u7684\u7528\u9014\u5e76\u6ca1\u6709\u5f00\u53d1\u51fa\u6765\uff0c\u6700\u540e\u51fa\u5916\u7f51\uff0c\u8fd8\u662f\u8981\u901a\u8fc7\u8def\u7531\u5668\u3002\u90a3\u4e9bvlan\u63a5\u53e3ip\u4e5f\u5931\u53bb\u4e86\u610f\u4e49\u3002
\u7f51\u7ba1\u578b\u7684\u4e8c\u5c42\u4ea4\u6362\u673a\u662f\u53ef\u4ee5\u8bbe\u7f6evlan\u7684\uff0c\u65b9\u6cd5\u548c\u4e09\u5c42\u4ea4\u6362\u673a\u662f\u4e00\u6837\u7684\u3002
\u5982\u679c\u4e8c\u5c42\u4ea4\u6362\u673a\u4e0a\u53ea\u6709\u4e00\u4e2avlan\uff0c\u90a3\u4e48\u4e5f\u53ef\u4ee5\u4e0d\u7528trunk\u3002trunk\u5c31\u662f\u7528\u6765\u4f20\u8f932\u4e2a\u4ee5\u4e0a\u7684vlan\u7684\u3002\u4e8c\u5c42\u4ea4\u6362\u673a\u4e0a\u4e00\u822c\u4e0d\u8bbe\u7f6evlan \u63a5\u53e3ip\uff0c\u9664\u975e\u8bbe\u7f6e\u51fa\u6765\u5f53\u8fdc\u7a0b\u767b\u5f55\u7684\u7ba1\u7406ip\u3002
vlan\u63a5\u53e3ip\u4e00\u822c\u662f\u7528\u6765\u505avlan\u5185pc\u7684\u9ed8\u8ba4\u7f51\u5173\u7684\uff0c\u4e00\u822c\u8bbe\u7f6e\u5728\u5177\u6709\u8def\u7531\u529f\u80fd\u7684\u4ea4\u6362\u673a\u6216\u662f\u8def\u7531\u5668\u4e0a\u3002\u800cvlan\u4e4b\u95f4\u7684\u8bbf\u95ee\u63a7\u5236acl\u89c4\u5219\uff0c\u65e2\u53ef\u4ee5\u5728\u4e09\u5c42\u4ea4\u6362\u673a\u4e0a\u8bbe\u7f6e\uff0c\u4e5f\u53ef\u4ee5\u5728\u8def\u7531\u5668\u4e0a\u8bbe\u7f6e
组网:路由器E0端口与交换机的上行trunk端口(第24端口)相连,交换机下行口划分3个VLAN,带若干主机.
拓扑图如下：
###################这里的路由器 是你的 juniper设备##################
1.路由器的配置 [Router]
[Router]inter e0
[Router-Ethernet0]ip add 10.0.0.1 255.255.255.0
[Router-Ethernet0]inter e0.1 //定义子接口E0.1
[Router-Ethernet0.1]ip add 172.16.1.1 255.255.255.0
[Router-Ethernet0.1]vlan-type dot1q vid 1 //指定以太网子接口属于VLAN1,此命令应用在以太网子接口上。只有配置了该命令之后，以太网子接口才会根据配置的VLAN ID 号在以太网帧头中嵌入VLAN 标签，与该网口相连的交换机接口才能正确处理接收到的帧。
[Router-Ethernet0.1]inter e0.2 //定义子接口E0.2
[Router-Ethernet0.2]ip add 172.16.2.1 255.255.255.0
[Router-Ethernet0.2]vlan-type dot1q vid 2 //指定以太网子接口属于VLAN2
[Router-Ethernet0.2]inter e0.3 //定义子接口E0.3
[Router-Ethernet0.3]ip add 172.16.3.1 255.255.255.0
[Router-Ethernet0.3]vlan-type dot1q vid 3 //指定以太网子接口属于VLAN3
[Router-Ethernet0.3]inter e0
[Router-Ethernet0]undo shut
% Interface Ethernet0 is up
[Router-Ethernet0] //用网线将E0端口连到S3026第24端口
%19:46:32: Interface Ethernet0 changed state to UP
%19:46:32: Line protocol ip on interface Ethernet0, changed state to UP
%19:46:32: Line protocol ip on interface Ethernet0.1, changed state to UP
%19:46:32: Line protocol ip on interface Ethernet0.2, changed state to UP
%19:46:32: Line protocol ip on interface Ethernet0.3, changed state to UP
2.交换机的配置 sys
Enter system view , return user view with Ctrl+Z.
[Quidway]vlan 1
[Quidway-vlan1]vlan 2
[Quidway-vlan2]port ethernet 0/17 to eth 0/19 eth 0/22 //将第17至19端口，和第22端口加入VLAN2
[Quidway-vlan2]vlan 3
[Quidway-vlan3]port eth 0/21 //将第21端口加入VLAN2
[Quidway-vlan3]inter e0/24
[Quidway-Ethernet0/24]port link-type trunk //将第24端口设为trunk口
[Quidway-Ethernet0/24]port trunk permit vlan all//允许所有VLAN流量通过
Please wait........................................... Done.
[Quidway-Ethernet0/24]dis port trunk //检验TRUNK口配置
Now, the following trunking ports exist:
Ethernet0/24
[Quidway-Ethernet0/24]dis vlan 2 //检验VLAN2的配置
VLAN ID: 2
VLAN Type: static
Route Interface: not configured
Description: VLAN 0002
Tagged Ports:
Ethernet0/24
Untagged Ports:
Ethernet0/17 Ethernet0/18 Ethernet0/19 Ethernet0/22
[Quidway-Ethernet0/24]dis vlan 3 //检验VLAN3的配置
VLAN ID: 3
VLAN Type: static
Route Interface: not configured
Description: VLAN 0003
Tagged Ports:
Ethernet0/24
Untagged Ports:
Ethernet0/21
3.在工作站上检查网络是否连通。此工作站连接S3026第21端口，属于VLAN2。
C:Documents and SettingsAdministrator>ipconfig
Windows 2000 IP Configuration
Ethernet adapter 本地连接:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 172.16.2.22
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 172.16.2.1
C:Documents and SettingsAdministrator>ping 172.16.3.1
Pinging 172.16.3.1 with 32 bytes of data:
Reply from 172.16.3.1: bytes=32 time<10ms TTL=255
Reply from 172.16.3.1: bytes=32 time<10ms TTL=255
Reply from 172.16.3.1: bytes=32 time<10ms TTL=255
Reply from 172.16.3.1: bytes=32 time<10ms TTL=255
Ping statistics for 172.16.3.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
4.在路由器上查看路由表。可以发现，由于172.16各网段都是直连路由，故不需启用路由协议或静态路由即能
实现VLAN之间的通讯。
[Router]display ip routing-table
Routing Tables:
Destination/Mask Proto Pref Metric Nexthop Interface
10.0.0.0/24 Direct 0 0 10.0.0.1 Ethernet0
10.0.0.1/32 Direct 0 0 127.0.0.1 LoopBack0
127.0.0.0/8 Direct 0 0 127.0.0.1 LoopBack0
127.0.0.1/32 Direct 0 0 127.0.0.1 LoopBack0
172.16.1.0/24 Direct 0 0 172.16.1.1 Ethernet0.1
172.16.1.1/32 Direct 0 0 127.0.0.1 LoopBack0
172.16.2.0/24 Direct 0 0 172.16.2.1 Ethernet0.2
172.16.2.1/32 Direct 0 0 127.0.0.1 LoopBack0
172.16.3.0/24 Direct 0 0 172.16.3.1 Ethernet0.3
172.16.3.1/32 Direct 0 0 127.0.0.1 LoopBack0
把第一台交换机属于vlan1的口连接第二台交换机属于vlan1的就行了，这两台交换机的vlan需要配置地址。还有第二台交换机上如果还有其他vlan，就需要配置trunk口了
两个交换机都要加vlan，将相应的端口加到各自的vlan里，接juniper路由器的接口也要设成trunk，在juniper路由器上的接口要用两个子接口对应两个vlan，在子接口上设置ip作为对应网段的网关。
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