cisco交换机怎么能让二层交换机ping通三层交换机，谢谢高手回答赐教 多个交换机不同VLAN如何通过三层交换机相互ping通.麻烦...
\u5728\u4e09\u5c42\u4ea4\u6362\u673a\u548c\u4e8c\u5c42\u4ea4\u6362\u673a\u505a\u5982\u4f55\u914d\u7f6e\u4f7f\u8fd9\u4e24\u53f0\u4e3b\u673aping\u901a2\u79cd\u60c5\u51b5\u53ef\u4ee5\u4e92\u901a\u3002
\u7b2c1\u79cd\uff0c\u5728\u7f51\u7edc\u4e2d\u4e0d\u5212\u5206VLAN\u65f6\uff0c\u7f51\u7edc\u4e8c\u5c42\u4e92\u901a\uff0c\u4e0d\u9700\u8981\u901a\u8fc7\u8def\u7531\uff0c\u5219\u5c062\u53f0\u7535\u8111\u7684IP\u5730\u5740\u8bbe\u7f6e\u4e3a\u540c\u4e00\u7f51\u6bb5\u7684\u5730\u5740\uff0c\u6bd4\u5982PC1 \u4e3a192.168.1.1/24\uff0cPC2 \u4e3a192.168.1.2/24\uff0c\u5c31\u53ef\u4ee5\u4e92\u901a\u3002
\u7b2c2\u79cd\uff0c\u5728\u4e8c\u5c42\u4ea4\u6362\u673a\u4e0a\u5212\u5206\u4e86VLAN\uff0c\u90a3\u4e48\uff0c\u5047\u8bbe\u56fe\u5de6\u8fb9\u7684\u4ea4\u6362\u673a\u4e3aS1\uff0c\u63a5\u53e3VLAN ID\u4e3a10\uff0c\u53f3\u8fb9\u7684\u4ea4\u6362\u673a\u4e3aS2\uff0c\u63a5\u53e3VLAN ID\u4e3a20\uff0c\u90a3\u4e48\u9700\u8981\u5c062\u4e2a\u4e8c\u5c42\u4ea4\u6362\u673a\u7684\u4e0a\u884c\u53e3\u914d\u7f6e\u4e3aTRUNK\u65b9\u5f0f\uff0c\u5e76\u5728\u4e09\u5c42\u4ea4\u6362\u673a\u4e0a\u914d\u7f6e2\u4e2aVLAN\u7684\u7f51\u5173\u5730\u5740\u3002\u540c\u65f6\u57282\u53f0\u4e3b\u673a\u4e0a\u914d\u7f6e\u76f8\u5e94\u7f51\u6bb5\u7684IP\u4ee5\u53ca\u7f51\u5173\u5730\u5740\u3002
\u5177\u4f53\u914d\u7f6e\u5982\u4e0b\uff1a
\u4e8c\u5c42\u4ea4\u6362\u673aS1\uff1a
S1#vlan database
S1(vlan)#vlan 10
S1(vlan)#exit
S1#conf t
S1(config)#int f0/2
S1(config-if)#switchport mode access
S1(config-if)#switchport acc vlan 10
S1(config)#int f0/1
S1(config-if)#switchport mode trunk
\u4e8c\u5c42\u4ea4\u6362\u673aS2\uff1a
S2#vlan database
S2(vlan)#vlan 20
S2(vlan)#exit
S2#conf t
S2(config)#int f0/2
S2(config-if)#switchport mode access
S2(config-if)#switchport acc vlan 20
S2(config)#int f0/1
S2(config-if)#switchport mode trunk
\u4e09\u5c42\u4ea4\u6362\u673aS3\uff1a
S3#vlan database
S3(vlan)#vlan 10
S3(vlan)#vlan 20
S3(vlan)#exit
S3#conf t
S3(config)#interface vlan 10
S3(config-if)#ip add 192.168.10.1 255.255.255.0
S3(config-if)#int vl 20
S3(config-if)#ip add 192.168.20.1 255.255.255.0
S3(config-if)#end
S3#sh ip route
Gateway of last resort is not set
C 192.168.10.0/24 is directly connected, Vlan10
C 192.168.20.0/24 is directly connected, Vlan20
\u914d\u7f6e\u5b8c\u6210\uff0c\u7136\u540e\u5c06PC1\u7684\u5730\u5740\u8bbe\u7f6e\u4e3a192.168.10.2\uff0c\u63a9\u7801255.255.255.0\uff0c\u7f51\u5173192.192.168.10.1
PC2\u7684\u5730\u5740\u8bbe\u7f6e\u4e3a192.168.20.2\uff0c\u63a9\u7801255.255.255.0\uff0c\u7f51\u5173192.192.168.20.1
\u5728PC2 Ping PC1\uff0c\u6709\u5982\u4e0b\u7ed3\u679c\uff1a
PC>ping 192.168.10.2
Pinging 192.168.10.2 with 32 bytes of data:
Request timed out.
Reply from 192.168.10.2: bytes=32 time=125ms TTL=127
Reply from 192.168.10.2: bytes=32 time=124ms TTL=127
Reply from 192.168.10.2: bytes=32 time=110ms TTL=127
\u697c\u4e0a\u7684\u8bf4\u6cd5\u6709\u4e9b\u52c9\u5f3a\uff0c\u4e0d\u7b97\u9519\uff0c\u4f46\u7edd\u5bf9\u4e0d\u5b8c\u5584\u3002
\u4e8c\u5c42\u4ea4\u6362\u673a\u4e4b\u95f4\u901a\u8fc7trunk\u4e92\u8054\uff0c\u4e0e\u4e09\u5c42\u4ea4\u6362\u673a\u7684\u63a5\u53e3\u5168\u90e8\u8d77trunk\uff0c\u5728\u4e09\u5c42\u4e0a\u5bf9vlan\u8fdb\u884c\u7ec8\u7ed3\uff0c\u5373\u8de8\u8d8a\u7f51\u6bb5\u8bbf\u95ee\u90fd\u5728\u4e09\u5c42\u8bbe\u5907\u4e0a\u5b9e\u73b0\uff0c\u8def\u7531\u5668\u53ef\u4ee5\u91c7\u7528\u5355\u81c2\u8def\u7531\u7b49\u65b9\u5f0f\uff0c\u4e09\u5c42\u4ea4\u6362\u673a\u5219\u76f4\u63a5\u5728vlan\u7684\u4e09\u5c42\u865a\u63a5\u53e3\u4e2d\u914d\u7f6e\u5730\u5740\u5c31\u884c\uff0c\u4f8b\u5982
int vlan 10
ip add 192.168.1.1
int vlan 20
ip add 192.168.2.1
ip routing
\u8fd9\u6837\u5b50\u4e24\u4e2a\u4e0d\u540c\u7684vlan\u4e4b\u95f4\u5c31\u53ef\u4ee5\u8bbf\u95ee\u4e86\u3002
如果是trunk，你三层交换上该vlan也得配相同段的地址。
如果两端都是access口，则配置你三层交换机端口所在vlan的vlan接口地址。
二个交换机之间连接的端口用trunk模式，两边选择一个vlan，配置上vlan interface ip，在同一个网段上，基本上就可以了。
二个交换机之间都用access模式，也可以，但也得配置vlan interface ip
一个用trunk，一个用access，一般不会这么用的，这个一般不行
建立管理地址就好
interfere vlan 1（默认管理口）
ip address 192.168.1.2 255.255.255.0
二层交换机没有IP怎么能用ping ， ping命令工作在3层
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