Configuring Loopback Interfaces, Gigabit Ethernet Interfaces, And Ip Routes - Cisco VGD-1T3 Software Configuration Manual

Voice gateway

Table of Contents

Basic Configuration Using the Command-Line Interface on the Cisco VGD 1T3 Voice Gateway

User Access Verification

Username: admin

Password:

Router#

Configuring Loopback Interfaces, Gigabit Ethernet Interfaces,

and IP Routes

To commission a basic dial access service, perform the following tasks (the CLI session for these tasks

is shown in Step 1):

•

Step 1

Assign the IP addresses as in the following example, and create an IP route to the default gateway:

Router(config)# interface loopback 0

Router(config-if)# ip address 172.22.99.1 255.255.255.255

Router(config-if)# exit

Router(config)# interface loopback 1

Router(config-if)# ip address 172.22.90.1 255.255.255.0

Router(config-if)# exit

Router(config)# interface GigabitEthernet 0/0

Router(config-if)# ip address 172.28.186.55 255.255.255.240

Router(config-if)# no shutdown

Router(config-if)# exit

Router(config)# ip route 0.0.0.0 0.0.0.0 172.28.186.49

In this example:

•

Verify that the Gigabit Ethernet interface is up. Ping the default gateway to verify this.

Step 2

Router# ping 172.28.186.49

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.28.186.49, timeout is 2 seconds:

.!!!!

Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/4 ms

Create two loopback interfaces.

Bring up the Gigabit Ethernet interface.

Add an IP route to the default gateway.

Interface loopback 0—Identifies the VGD 1T3 voice gateway with a unique and stable IP address.

One unique IP address from a common block of addresses is assigned to each device in the IP

network. This technique makes security-filtering easy for the Network Operations Center (NOC).

One Class C subnet used for device identification can support 254 distinct devices with unique

loopback addresses.

Interface loopback 1—Hosts a pool of IP addresses for the remote nodes. In this way, 1 route, instead

of 254 routes, is summarized and propagated to the backbone. Pick the IP address for loopback 1

from the range of addresses that you will assign to the local address pool.