Two-line access technology for Cisco Routers

 

Two-line access technology for Cisco Routers

In some cases, we need to implement dual-line access to ensure stable operation of the network and ensure reliable service quality. The following steps can be taken:

1. Configure the IP address of the Internet access interface, which is generally from China Telecom or China Netcom.

2. Configure the access control list

3. Configure the NAT address pool

4. Configure the route-map table

5. Configure NAT

6. Set the default route

Step 1:

Configure the cnc interface:

Interface GigabitEthernet1/1

Ip address 60.10.135.11 255.255.255.242

Ip nat outside

Configure tel interface:

Interface GigabitEthernet1/2

Ip address 219.148.157.22 255.255.255.252

Ip nat outside

Configure the Intranet interface:

Interface GigabitEthernet1/3

Ip address 192.168.0.1 255.255.255.0

Ip nat inside

Step 2: Configure accelist-list

Access-list 100 permit ip 192.168.0.0 0.0.255 any

Step 3: configure the address pools of the cnc and tel respectively.

Ip nat pool pool2 60.10.135.11 60.10.135.11 netmask has been released

Ip nat pool pool1 219.148.157.22 219.148.157.22 netmask 255.255.252

Step 4: Configure two route-map

Route-map isp2 permit 10

Matches ip address 100

Match interface GigabitEthernet1/1

!

Route-map isp1 permit 10

Matches ip address 100

Match interface GigabitEthernet1/2

Step 5: Configure two nat

Ip nat inside source route-map isp1 pool pool1 overload

Ip nat inside source route-map isp2 pool pool2 overload

Step 6: Configure routes

The default route from China Telecom: ip route 0.0.0.0 0.0.0.0 219.148.157.21

The destination address is China Netcom, for example, ip route 202.99.168.0 255.255.255.248.0 60.10.135.1.

Add all China Netcom CIDR blocks.

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