Dell W-Series 304 Instant 6.5.1.0-4.3.1.0 User Guide - Page 207

DHCP Configuration, Configuring DHCP Scopes

Page 207 highlights

Chapter 15 DHCP Configuration This chapter provides the following information: l Configuring DHCP Scopes on page 207 l Configuring the Default DHCP Scope for Client IP Assignment on page 214 Configuring DHCP Scopes The VC supports different modes of Dynamic Host Configuration Protocol (DHCP) address assignment. With each DHCP address assignment mode, various client traffic forwarding modes are associated. For more information on client traffic forwarding modes for IAP-VPN, see IAP-VPN Forwarding Modes on page 239. When using a local DHCP scope in a W-IAP cluster, ensure that the VLANs configured for this DHCP scope is allowed in the uplink switch. In a single W-IAP network, when using a client DHCP scope for wired clients, ensure that client VLAN is not added in the allowed VLAN list for the port to which the W-IAP E0 port is connected. This section describes the following procedures: l Configuring Local DHCP Scopes on page 207 l Configuring Distributed DHCP Scopes on page 209 l Configuring Centralized DHCP Scopes on page 212 Configuring Local DHCP Scopes You can configure Local; Local, L2; and Local, L3 DHCP scopes through the Instant UI or the CLI. l Local-In this mode, the VC acts as both the DHCP server and the default gateway. The configured subnet and the corresponding DHCP scope are independent of the subnets configured in other W-IAP clusters. The VC assigns an IP address from a local subnet and forwards traffic to both corporate and non-corporate destinations. The network address is translated appropriately and the packet is forwarded through the IPsec tunnel or through the uplink. This DHCP assignment mode is used in the Networks Address Translation (NAT) forwarding mode. l Local, L2-In this mode, the VC acts as a DHCP server and the gateway located outside the W-IAP. l Local, L3-This DHCP assignment mode is used with the L3 forwarding mode. In this mode, the VC acts as a DHCP server and the gateway, and assigns an IP address from the local subnet. The W-IAP routes the packets sent by clients on its uplink. The Local, L3 subnets can access corporate network through the IPsec tunnel. The network address for all client traffic, which is generated in the Local, L3 subnets and destined to the corporate network, is translated at the source with the tunnel inner IP. However, if corporate access to Local, L3 is not required, you can configure ACL rules to deny access. In the Instant UI To configure a Local or a Local, L3 DHCP scope: 1. Click More > DHCP Server. The DHCP Server window is displayed. 2. To configure a Local; Local, L2; or Local, L3 DHCP scopes, click New under Local DHCP Scopes. The New DHCP Scope window is displayed. 3. Based on the type of DHCP scope selected, configure the following parameters: Dell Networking W-Series Instant 6.5.1.0-4.3.1.0 | User Guide DHCP Configuration | 207

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Dell Networking W-Series Instant 6.5.1.0-4.3.1.0 | User Guide
DHCP Configuration |
207
Chapter 15
DHCP Configuration
This chapter provides the following information:
l
Configuring DHCP Scopes on page 207
l
Configuring the Default DHCP Scope for Client IP Assignment on page 214
Configuring DHCP Scopes
The VC supports different modes of Dynamic Host Configuration Protocol (DHCP) address assignment. With
each DHCP address assignment mode, various client traffic forwarding modes are associated. For more
information on client traffic forwarding modes for IAP-VPN, see
IAP-VPN Forwarding Modes on page 239
.
When using a local DHCP scope in a W-IAP cluster, ensure that the VLANs configured for this DHCP scope is
allowed in the uplink switch.
In a single W-IAP network, when using a client DHCP scope for wired clients, ensure that client VLAN is not
added in the allowed VLAN list for the port to which the W-IAP E0 port is connected.
This section describes the following procedures:
l
Configuring Local DHCP Scopes on page 207
l
Configuring Distributed DHCP Scopes on page 209
l
Configuring Centralized DHCP Scopes on page 212
Configuring Local DHCP Scopes
You can configure Local; Local, L2; and Local, L3 DHCP scopes through the Instant UI or the CLI.
l
Local
—In this mode, the VC acts as both the DHCP server and the default gateway. The configured subnet
and the corresponding DHCP scope are independent of the subnets configured in other W-IAP clusters. The
VC assigns an IP address from a local subnet and forwards traffic to both
corporate
and
non-corporate
destinations. The network address is translated appropriately and the packet is forwarded through the
IPsec tunnel or through the uplink. This DHCP assignment mode is used in the Networks Address
Translation (NAT) forwarding mode.
l
Local, L2
—In this mode, the VC acts as a DHCP server and the gateway located outside the W-IAP.
l
Local, L3
—This DHCP assignment mode is used with the L3 forwarding mode. In this mode, the VC acts as
a DHCP server and the gateway, and assigns an IP address from the local subnet. The W-IAP routes the
packets sent by clients on its uplink. The Local, L3 subnets can access corporate network through the IPsec
tunnel. The network address for all client traffic, which is generated in the Local, L3 subnets and destined to
the corporate network, is translated at the source with the tunnel inner IP. However, if corporate access to
Local, L3 is not required, you can configure ACL rules to deny access.
In the Instant UI
To configure a Local or a Local, L3 DHCP scope:
1. Click
More > DHCP Server
. The
DHCP Server
window is displayed.
2. To configure a
Local
;
Local, L2
; or
Local, L3
DHCP scopes, click
New
under
Local DHCP Scopes
. The
New DHCP Scope
window is displayed.
3. Based on the type of DHCP scope selected, configure the following parameters: