Configure a DHCP Relay
Table of Contents
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- Add a Branch
- Add a Data Center
- Add a Branch Gateway
- Configure Circuits
- Configure Internet Circuit Underlay Link Aggregation
- Configure Private WAN Underlay Link Quality Aggregation
- Configure Circuit Categories
- Configure Device Initiated Connections for Circuits
- Add Public IP LAN Address to Enterprise Prefixes
- Manage Data Center Clusters
- Configure a Site Prefix
- Configure a DHCP Server
- Configure NTP for Prisma SD-WAN
- Configure the ION Device at a Branch Site
- Configure the ION Device at a Data Center
- Switch a Site to Control Mode
- Allow IP Addresses in Firewall Configuration
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- Configure a Controller Port
- Configure Internet Ports
- Configure WAN/LAN Ports
- Configure a Loopback Interface
- Configure a PoE Port
- Configure and Monitor LLDP Activity and Status
- Configure a PPPoE Interface
- Configure a Layer 3 LAN Interface
- Configure Application Reachability Probes
- Configure a Secondary IP Address
- Configure a Static ARP
- Configure a DHCP Relay
- Configure IP Directed Broadcast
- VPN Keep-Alives
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- Configure Prisma SD-WAN IPFIX
- Configure IPFIX Profiles and Templates
- Configure and Attach a Collector Context to a Device Interface in IPFIX
- Configure and Attach a Filter Context to a Device Interface in IPFIX
- Configure Global and Local IPFIX Prefixes
- Flow Information Elements
- Options Information Elements
- Configure the DNS Service on the Prisma SD-WAN Interface
- Configure SNMP
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- Prisma SD-WAN Branch Routing
- Prisma SD-WAN Data Center Routing
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- Configure Multicast
- Create a WAN Multicast Configuration Profile
- Assign WAN Multicast Configuration Profiles to Branch Sites
- Configure a Multicast Source at a Branch Site
- Configure Global Multicast Parameters
- Configure a Multicast Static Rendezvous Point (RP)
- Learn Rendezvous Points (RPs) Dynamically
- View LAN Statistics for Multicast
- View WAN Statistics for Multicast
- View IGMP Membership
- View the Multicast Route Table
- View Multicast Flow Statistics
- View Routing Statistics
- Prisma SD-WAN Incident Policies
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- Prisma SD-WAN Branch HA Key Concepts
- Configure Branch HA
- Configure HA Groups
- Add ION Devices to HA Groups
- View Device Configuration of HA Groups
- Edit HA Groups and Group Membership
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- Configure Branch HA with Gen-1 Platforms (2000, 3000, 7000, and 9000)
- Configure Branch HA with Gen-2 Platforms (3200, 5200, and 9200)
- Configure Branch HA with Gen-2 Embedded Switch Platforms (1200-S or 3200-L2)
- Configure Branch HA for Devices with Software Cellular Bypass (1200-S-C-5G)
- Configure Branch HA for Platforms without Bypass Pairs
- Configure Branch HA in a Hybrid Topology with Gen-1 (3000) and Gen-2 (3200) Platforms
- Prisma SD-WAN Incidents and Alerts
Configure a DHCP Relay
Let us learn to configure a DHCP relay in Prisma SD-WAN. DHCP Relay is a branch-site
feature that is configured at the interface level on a device.
Where Can I Use This? | What Do I Need? |
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DHCP Relay is a branch-site feature that is configured at the interface level on a device.
Typically, a DHCP Relay agent is used to forward DHCP requests between clients and
servers that are not on the same physical subnet. DHCP Relay can be configured on a
controller port, a LAN port, or on a sub-interface that has a defined, static IP
address. DHCP Relay is enabled for VRF.
When a ION device receives a
DHCP request from a client on the interface configured with DHCP
Relay, it forwards those requests to configured DHCP servers. It
also listens to DHCP responses from all DHCP servers and relays
them to the client. The DHCP Relay requests are forwarded only when
the ION device is assigned to a site and the site is in active mode.
An
ION device with DHCP Relay:
- Forwards DHCP client broadcast requests to the configured DHCP server.
- Forwards DHCP unicast request from another DHCP Relay agent downstream on the LAN-side to the configured DHCP server.
- Forwards DHCP client/DHCP Relay agent broadcast/unicast requests to another DHCP Relay agent.
In the event of a
DHCP server error, the ION device forwards all rejections back to
the client. In the event of a client rejection, the ION device forwards
all rejections from the client back to the DHCP server.
- Select WorkflowsDevicesClaimed Devices, select the device you want to configure.Select the Interfaces tab.Select a port.For Admin Up, select No or Yes.(Optional) Enter a Description.For Interface Type, select Port.For Use This Port For select LAN.For IPv4 Configuration select Static or DHCP.For Static, enter the IP Address/Mask, and Default Gateway information.For DHCP Relay, select Yes to enable it.
- Define DHCP server IP addresses.Up to 16 DHCP server IP addresses may be added.(Optional) Define the source interface used to send DHCP requests to the servers.By default, the controller port is used. Make sure that the defined source interface can reach DHCP server IP addresses and vice versa. If the DHCP server is local to the branch the source interface must be the interface from which the DHCP server is accessible.(Optional) Enable Option 82 and configure the Circuit ID, Remote ID, and Reforwarding policy.The ION device DHCP Relay agent can include additional information by using DHCP Option 82, Circuit ID, and Remote ID, which the DHCP server uses to allocate the appropriate IP address.Save Port.