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- 防火墙上先建立BVI,BVI的IP地址,子网掩码应该包括所有需要通信的各个子网
- 配置物理接口的子接口,用来识别交换机Trunk里的vlan。
分别在inside和outside物理接口上建立子接口(物理接口不用配内容),子接口的vlanID要与相连的交换机相应vlan的ID匹配
- 防火墙上先建立BVI,BVI的IP地址,子网掩码应该包括所有需要通信的各个子网
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需要了解的原理:
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配置示例:
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ASA config:
interface Ethernet0/1 //物理接口什么都不用配
description Link to S3
no nameif
no security-level
!
interface Ethernet0/1.11 //配置子接口
description Link to S3 for VLAN 11
vlan 11 //vlan号要与相连的交换机的Trunk中要通过的vlan相同
nameif OUTSIDE-11 //必须起个名
bridge-group 1 //放到BVI1里
security-level 0 //等级为0,最低
!
interface Ethernet0/1.22
description Link to S3 for VlAN 22
vlan 22
nameif OUTSIDE-22
bridge-group 2
security-level 0
!
interface Ethernet0/2
description Link to S1
no nameif
no security-level
!
interface Ethernet0/2.10
description Link to S1 for VLAN 10
vlan 10
nameif INSIDE-10
bridge-group 1 //与上面的outside相对应
security-level 100
!
interface Ethernet0/2.20
description Link to S1 for VLAN 20
vlan 20
nameif INSIDE-20
bridge-group 2
security-level 100
!
interface BVI1
ip address 192.168.1.1 255.255.255.0 //注意这里的子网要包括vlan的子网。当然,可以多个vlan用同一个BVI。
!
interface BVI2
ip address 192.168.2.1 255.255.255.0
!
fixup protocol icmp
S1 config:
interface Vlan10
ip address 192.168.1.100 255.255.255.0
!
interface Vlan20
ip address 192.168.2.100 255.255.255.0
!
interface FastEthernet0/1
description Link to S2
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/5
description Link to R1
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/24
description Link to ASA
switchport trunk encapsulation dot1q
switchport mode trunk
S3 config:
interface Vlan11
ip address 192.168.1.200 255.255.255.0
!
interface Vlan22
ip address 192.168.2.200 255.255.255.0
!
interface FastEthernet0/24
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/5
switchport access vlan 11
switchport mode access
interface FastEthernet0/1
!
switchport access vlan 22
switchport mode access
switchport nonegotiate
R1 IP address: 192.168.1.10
R3 IP address: 192.168.1.20
S2 IP address: 192.168.2.10
S4 IP address: 192.168.2.20
CiscoASA防火墙Trunk透明传输
华为防火墙,透明模式部署时,要通过的是多个Vlan,将物理端口设置为Trunk,再配上需要通过的vlan,即可,非常方便。cisco的就弱爆了,如下:
实现目的:Cisco ASA防火墙做透明模式,串在交换机Trunk口之间。
网络拓扑:交换机1的Trunk---防火墙---交换机2的Trunk