1. 两条公网出口,分别为移动,联通
2. 两台ASA做主备配置,实现出口故障转移
3. 内网两台核心做堆叠配置(由于模拟器无法实现堆叠,此处使用HSRP)
需求描述
1. 当一条公网链路故障后,上网流量切换到备用线路
2. 当一台ASA故障后,流量切换到备用ASA
3. 当一台核心故障后,实现内网用户流量冗余
拓扑简介
1. vios9模拟移动链路,vios10模拟联通链路
2. switch13模拟公网主机
3. 出口两台switch作为互联网接入交换机
4. ASA作为出口设备,代理内网用户上网
5. 内网两台核心做HSRP配置
6. switch12 模拟内网主机
配置详情
1. vios9
interface GigabitEthernet0/0
ip address 10.10.10.1 255.255.255.0
interface GigabitEthernet0/1
ip address 10.10.200.2 255.255.255.0
ip route 30.30.30.0 255.255.255.0 10.10.200.1 //通往公网主机路由
2. vios10
interface GigabitEthernet0/0
ip address 20.20.20.1 255.255.255.0
interface GigabitEthernet0/1
ip address 10.10.100.2 255.255.255.0
ip route 30.30.30.0 255.255.255.0 10.10.100.1 //通往公网主机路由
3. 互联网接入交换机配置
左边交换机
右边交换机
4. ASA配置
左边防火墙
failover //启用failover功能
failover lan unit primary //配置ASA角色为主
failover lan interface failover_lan GigabitEthernet0/1
failover key cisco1234 //配置通讯秘钥
failover link failover_link GigabitEthernet0/2
failover interface ip failover_lan 1.1.1.5 255.255.255.252 standby 1.1.1.6
failover interface ip failover_link 1.1.1.9 255.255.255.252 standby 1.1.1.10
右边防火墙
failover
failover lan unit primary
failover lan interface failover_lan GigabitEthernet0/1
failover key cisco1234
failover link failover_link GigabitEthernet0/2
failover interface ip failover_lan 1.1.1.5 255.255.255.252 standby 1.1.1.6
failover interface ip failover_link 1.1.1.9 255.255.255.252 standby 1.1.1.10
此时 ASA的主备功能配置完成,剩余的配置只要在主设备配置即可,备设备会自动同步
查看failover状态
以下为防火墙接口配置,nat配置,路由配置 acl配置
新建内网网段对象,并配置NAT
object network obj-inside1
subnet 192.168.10.0 255.255.255.0
object network obj-inside2
subnet 192.168.10.0 255.255.255.0
===============
object network obj-inside1
nat (inside,outside1) dynamic interface
object network obj-inside2
nat (inside,outside2) dynamic interface
=============
路由配置
route outside1 0.0.0.0 0.0.0.0 10.10.10.1 1 track 1 //此处默认走此路由,配置track,当track链路出现问题时,自动切换默认路由
route outside2 0.0.0.0 0.0.0.0 20.20.20.1 254
route inside 192.168.10.0 255.255.255.0 1.1.1.18 1
=============
track配置
sla monitor 123
type echo protocol ipIcmpEcho 10.10.10.1 interface outside1
num-packets 3
frequency 10
sla monitor schedule 123 life forever start-time now
track 1 rtr 123 reachability
==============
acl配置
access-list des_out extended permit icmp any any //此处为了验证,放行icmp
access-group des_out in interface outside1 //分别在两个公网接口调用
access-group des_out in interface outside2 //分别在两个公网接口调用
5. 核心交换机配置
接口配置
左