Справочник Пользователя для Nortel Networks 4050

44 Chapter 1 Overview

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For each VLAN:

Create a DHCP scope.

Specify the IP address range and subnet mask for that scope.

Configure the following DHCP options:

— Specify the default gateway.

— Specify the DNS server to be used by endpoints in that scope.

— If desired, configure DHCP so that the IP Phones learn their VLAN 

configuration data automatically from the DHCP server. For more 
information, see 

Configure the network core router:

Create the Red, Yellow, Green, VoIP, and Nortel SNAS 4050 management 
VLANs.

If the edge switches are operating in Layer 2 mode, enable 802.1q tagging 
on the uplink ports to enable them to participate in multiple VLANs, then 
add the ports to the applicable VLANs.

Configure IP addresses for the VLANs.

These IP interfaces are the default gateways the DHCP Relay will use.

If the edge switches are operating in Layer 2 mode, configure DHCP relay 
agents for the Red, Yellow, Green, and VoIP VLANs.

Note: For the Red VLANs, the DNS server setting is one of the Nortel 
SNAS 4050 portal Virtual IP addresses (pVIP).

While the endpoint is in the Red VLAN, there are limited DNS server 
functions to be performed, and the Nortel SNAS 4050 itself acts as the 
DNS server. When the endpoint is in one of the other VLANs, DNS 
requests are forwarded to the corporate DNS servers.

The DNS server setting is required for the captive portal to work.

Note: The uplink ports must participate in all the VLANs.