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Configuration Guide - IP Service

CloudEngine 12800 and 12800E V200R005C00

This document describes the configurations of IP Service, including IP address, ARP, DHCP, DNS, IP performance optimization, IPv6, DHCPv6, and IPv6 DNS.
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Distributed VXLAN Gateways Functioning as DHCP Relay Agents

Distributed VXLAN Gateways Functioning as DHCP Relay Agents

VXLAN support for DHCP relay allows tenants to dynamically obtain IP addresses using DHCP. This section uses a distributed gateway as an example to describe DHCP relay in inter-VPN and intra-VPN scenarios.

DHCP Client and Server on the Same VPN

On the network shown in Figure 3-14, the requirements are as follows:
  • Distributed Layer 3 VXLAN gateways are deployed on leaf1, leaf2, and leaf3, between which are connected over a Layer 3 VXLAN tunnel.
  • VM1 and VM3 belong to one subnet, and VM2 and VM4 belong to another subnet.
  • The DHCP server connected to leaf3 belongs to the same VPN but different subnet as VM1, VM2, VM3, and VM4.
After DHCP relay is deployed on leaf1 and leaf2, VM1, VM2, VM3, and VM4 can function as DHCP clients to dynamically request for IP addresses from the DHCP server.
Figure 3-14 VXLAN support for DHCP relay in intra-VPN Scenarios

DHCP Client and Server on Different VPNs

Figure 3-15 shows an inter-VPN scenario where VM1, VM2, VM3, and VM4 belong to one VPN while the DHCP server belongs to another VPN.

Figure 3-15 VXLAN support for DHCP relay in inter-VPN Scenarios

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Updated: 2019-04-18

Document ID: EDOC1100039535

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