ERG3 Router Series

Basic Network Access (DHCP-Based IP Address Acquisition) (Web)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contents

Introduction· 1

Prerequisites· 1

Example: Configuring basic network access· 1

Network configuration· 1

Software version used· 1

Restrictions and guidelines· 2

Procedures· 2

Quick configuration· 2

Network configuration· 5

Verifying the configuration· 9

 

Introduction

This document provides an example of configuring basic network access (DHCP-based IP address acquisition) through the Web interface of an ERG3 router.

Prerequisites

This document is not restricted to specific software or hardware versions. Procedures and information in the examples might be slightly different depending on the software or hardware version of the device.

The configuration examples were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

The following information is provided based on the assumption that you have basic knowledge of DHCP and NAT.

Example: Configuring basic network access

Network configuration

As shown in Figure 1, the device acts as the egress router on the enterprise network and uses a single DHCP-enabled WAN interface to provide the PC with access to the Internet.

Figure 1 Network diagram

 

Software version used

This example is applicable to the ERG3 router series of the H3C Comware 7 platform. This document takes version R0136 of the H3C ER3200G3 router as an example. The specific operations might differ by product model and software version.

Restrictions and guidelines

The address range in the address pool configured on the LAN interface cannot belong to the same network segment as the IP address of the WAN interface on the device.

Procedures

You can use either of the following methods to configure basic network access settings:

·     Quick configuration: Configures the key settings used for fast network access in the single-WAN or dual-WAN scenario. This configuration method is simple and can satisfy common network access demands.

·     Network configuration: Configures the network access settings used in the single-WAN, dual-WAN, or multi-WAN scenario. Compared with the fast configuration mode, this configuration mode provides more configurable parameters to meet requirements for higher network performance and custom network access.

Quick configuration

Configuring the WAN access scenario

# In this example, configure single-WAN as the access scenario for the router as follows:

1.     Log into the Web interface of the router, and then select Quick Config from the left navigation pane.

2.     On the Scenario page, select Single-WAN Scenario.

3.     Click Next to open the single-WAN configuration page.

Figure 2 Selecting a WAN access scenario

 

Configuring WAN interface settings

1.     In the Connection Mode field, select DHCP.

2.     In the DNS1 and DNS2 fields, enter DNS server IP addresses 114.114.114.114 and 8.8.8.8. These DNS servers are used for WAN access.

3.     In the NAT field, select Enable.

4.     Click Next to open the LAN configuration page.

Figure 3 Configuring single-WAN settings

 

Configuring LAN interface settings

1.     In the IP Address field, enter 192.168.10.1. In the Subnet Mask field, enter 255.255.255.0.

2.     Enable the DHCP service.

3.     In the IP Allocation Range field, enter IP address range 192.168.10.1 to 192.168.10.254. This IP address range is used for dynamic address assignment by DHCP.

4.     In the Excluded IP Addresses field, exclude certain IP addresses in the specified IP address range from dynamic address assignment. In this example, gateway address 192.168.10.1 is excluded.

5.     In the Gateway Address field, enter 192.168.10.1.

6.     In the DNS1 and DNS2 fields, enter DNS server IP addresses 114.114.114.114 and 8.8.8.8.

7.     Click Next.

Figure 4 Configuring LAN settings

 

Saving the configuration

Click Finish to save the above configuration.

Figure 5 Saving the configuration

 

Network configuration

Configuring the interface mode

# In this example, configure single-WAN as the interface mode for the router as follows:

1.     Log in to the Web interface of the router, and then navigate to the Network Settings > External Networks page.

2.     Click the Configure Interface Mode tab, and then select Single-WAN.

3.     Click Apply.

Figure 6 Configuring the interface mode

 

Configuring WAN interface settings

1.     Click the WAN Settings tab.

2.     Click the Edit icon in the Actions column for interface WAN1.

3.     In the Connection Mode field, select DHCP.

¡     In the DNS1 and DNS2 fields, enter DNS server IP addresses 114.114.114.114 and 8.8.8.8. These DNS servers are used for WAN access.

¡     In the MAC Address field, select Factory Default MAC because the service provider does not specify a MAC address.

¡     In the NAT field, select Enable.

4.     Retain the default settings of the remaining parameters, and then click Apply.

Figure 7 Edit WAN interface settings

 

 

Configuring LAN interface settings

# Add VLAN 10 on the router and assign IP address 192.168.10.1 to VLAN-interface 10 as follows:

1.     On the Web interface of the router, navigate to the Network Settings > LANs page, and then click the VLAN Settings tab.

2.     Click Add.

3.     In the VLAN ID field, enter 10.

4.     In the IP Address field, enter 192.168.10.1.

5.     In the Subnet Mask field, enter 255.255.255.0.

6.     In the TCP MSS field, enter 1280. In the MTU field, enter 1500.

7.     Enable the DHCP service on the VLAN interface, and then configure the following fields:

¡     In the Start IP Address and End IP Address fields, specify IP address range 192.168.10.0 to 192.168.10.254. This IP address range is used for dynamic IP address assignment to clients.

¡     In the Excluded IP Addresses field, exclude certain IP addresses in the specified IP address range from dynamic address assignment. In this example, gateway address 192.168.10.1 is excluded.

¡     In the Gateway Address field, enter 192.168.10.1.

¡     In the DNS1 and DNS2 fields, enter DNS server IP addresses 114.114.114.114 and 8.8.8.8.

¡     In the Address Lease field, enter the lease (in minutes) of IP addresses to be allocated. For example, to specify the lease of IP addresses as five days, enter 7200.

8.     Retain the default settings of the remaining parameters, and then click Apply.

Figure 8 Adding a VLAN

 

# Assign interface LAN1 to VLAN 10 as follows:

1.     On the Web interface of the router, navigate to the Network Settings > LANs page, and then click the VLAN Division tab.

2.     Click the Edit icon in the Actions column for interface LAN1.

3.     In the PVID field, select 10.

4.     Click Apply.

Figure 9 Assigning a LAN interface to a VLAN

 

Verifying the configuration

The PC can access the Internet.