Cisco 881V Uživatelský manuál stáhnout pdf (Strana 2)

WAN Failover: Cisco 881 and AirLink ES440

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Configure the Cisco 881 Router for WAN Failover

Configure the Cisco router’s IP SLA feature to support WAN failover. Figure 2

shows the router ports used in this sample configuration.

Figure2: Sample Fast Ethernet port configuration for Cisco 881

The following instructions provide a sample Cisco 881 configuration.

1. Connect the router to a laptop, using the serial cable supplied with the router.

If you are asked to enter an initial configuration, choose No.

2. Open a terminal connection on the serial interface, using a terminal emulator

application such as TeraTerm, PuTTY, etc. Configure the terminal speed to

9600 baud.

3. Type “enable” to enter root mode, and then type “configure terminal” to enter

configuration mode.

4. Configure the internal VLAN: 192.168.1.1 using DHCP.

5. Configure the connection to the AirLink ES440 as an independent VLAN.

LANWAN Primary

43210Console

WAN Backup

ip dhcp pool ccp-pool

import all

lease 0 2

network 192.168.1.0 255.255.255.0

default-router 192.168.1.1

dns-server 8.8.4.4

interface vlan 1

description "Internal VLAN"

ip address 192.168.1.1 255.255.255.0

no shutdown

Create a DHCP pool for the router DHCP server.

The router is the default gateway for DHCP clients.

This example uses the Google DNS server (8.8.4.4).

If you use a different DNS, choose one that will work

The router interface for the default VLAN1

This IP must be included in the DHCP pool.

Turn the interface up.

with both the primary and backup routes, i.e. do not

choose the ES440 or a host inside your ISP.

interface

FastEthernet3

switchport access vlan

interface vlan 2

description "backup VLAN"

ip address 192.168.13.101 255.255.255.0

no shutdown

The interface the ES440 is connected to

Make this interface belong to VLAN2.

The router IP address inside the ES440 VLAN

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