
A [DHCP](/dhcp) renewal occurs when a DHCP lease expires. The DHCP host will contact the original leasing DHCP server and request a new lease. A renewal **simply renews the lease time**. The actual IP address and the [MAC](/switching-media-access-control-mac-addresses) address in the server entry, and any DHCP options used all remain the same.

A rebinding is when a host will remove all network information it may have previously obtained from a DHCP server and will begin from scratch.  It sends out a broadcast asking for a DHCP server to respond and binds to the server that responds successfully.

When a host attempts to perform a DHCP renew and it fails for some reason, it will then attempt a rebind.

## Links

https://forum.networklessons.com/t/introduction-to-dhcp/970/54?u=lagapides

DHCP renewal rebinding

Cisco SD-WAN export configs and files

Cisco SD-WAN export with python

Cisco SD-WAN lab options

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Cisco SD-WAN scp command

Cisco SD-WAN vEdge Troubleshooting

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Cisco SD-WAN verify connectivity in Service VPN

Cisco SD-WAN viptela overlay network bringup

Cisco Switch Port Configuration for IP Phone

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Classification and Marking of softphone applications

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DHCP - Commonly used options for IP phones

DHCP - DHCPv6 and the default gateway

DHCP - How a host is identified by a remote DHCP server

DHCP - Message Types

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DHCP - Understanding the Magic Cookie

DHCP - Using the MAC as the client ID on a Cisco device

DHCP Auto Image Update support

DHCP DORA process

DHCP Request message sent as broadcast

DHCP Snooping on a multi-switch topology

DHCP client options on Cisco IOS

DHCP decline message

DHCP excluding address on a Cisco IOS DHCP server

DHCP multiple IP helper-addresses

DHCP multiple servers on the same subnet

DHCP offer message sent as broadcast

DHCP option 82

DHCP relay agent

DHCP relay support for MPLS VPN

DHCP snooping rate limiting best practice

DHCP trusted and untrusted ports

DHCP

DHCPv6 - Modes of Operation

DHCPv6 - determining the IPv6 prefix assigned to an interface

DHCPv6 lease times on a Cisco IOS device

DHCPv6 relay agent

DMVPN - Dual-Hub Single-Cloud with redundant spoke links config guidelines

DMVPN - IPsec encryption order of operations

DMVPN - NHRP purge request

DMVPN - NHRP session attributes

DMVPN - OSPF and multiple areas

DMVPN - Phase 2 BGP peerings

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DMVPN - Phase 2 OSPF neighbor adjacencies

DMVPN - Phase 2 and multicast traffic

DMVPN - Phase 2 and summarization

DMVPN - Using the GRE tunnel key

DMVPN - What is the best routing protocol to use

DMVPN - mappings on hub and spokes

DMVPN - multicast commands

DMVPN - nhrp map and nhs command syntax

DMVPN - spoke redundancy

DMVPN - using a default route

DMVPN State of a tunnel

DMVPN dual hub dual cloud

DMVPN dual hub single cloud

DMVPN hierarchical topology

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DMVPN with more than two hubs

DMVPN

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DTP - best practice to disable

DTP - how to disable

Debug Condition Command Restrictions in Cisco IOS

Decrypt IPSec ESP traffic with Wireshark

Demand Circuits

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Difference between per-prefix LFA and per-link based LFA