Cisco 2921 router release/renew all dhcp addresses

[nickj2585]

Hello,

This may be a very basic question but I am brand new to Cisco IOS.  I have been tasked with figuring out how to release and renew all dhcp addresses on our Cisco 2921 router.  I have so far found out how to do them one at a time using:

Router# release dhcp ethernet 3/1

Router# renew dhcp Ethernet 3/1

Would rebooting the router release and renew all of the dhcp addresses? If not, is there a command I could use to release and renew all of them at the same time?

Thank you.

[acampbell · Accepted solution]

Hi,

Try this from priviladge mode

router#clear ip dhcp binding *

Regards,
Alex.
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[cadet alain · Accepted solution]

Hi,

You are a DHCP client on multiple interfaces ? if so doing a shut/no shut on the range of interfaces would achieve what you want and you could automate it with an EEM script.

Regards

Alain

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