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Cisco ios updating dns

The client with the help of IP helper address on the relay agent is able to receive its IP address and all other information options provided.

Stelios has written many articles covering Cisco CCENT, CCNA, and CCNP.This information can be used to authenticate the client and help the DHCP server to apply the appropriate policy decisions.The image below shows schematically the DHCP relay information option concept.A Cisco router is configured to provide DHCP functionality as follows: Based on the above configuration let's see the messages exchanged as captured from Ethereal application.A screen shot of the messages can be seen below: Details on the DHCP Offer message sent by the Cisco router can be seen below.Stelios is currently working as a Vo IP Engineer in a Telecom company, where he uses his knowledge in practice.He has successfully completed training on CCNP topics, Linux and IMS.(CCNA, NET , MOUS) holds a BSc in Electronic Engineering and an MSc in Communication Networks.He has over three years of experience in teaching MS Office applications, networking courses and GCE courses in Information Technology.Both protocols have been created to provide IP addresses to clients when needed.The difference between them is that while Boot P provides an IP address to a client according to the client's hardware address on the Boot P server table, DHCP by default provides an IP address automatically to the client from a pool of IP addresses.


  1. IOS DHCP and Dynamic DNS updates for. to tell the clients to dynamically update the DNS server. Is the same functionality available in the Cisco IOS DHCP.

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