Solved

DHCP HA in Cisco switches 6504

Posted on 2014-09-27
2
109 Views
Last Modified: 2015-07-29
Hi - We have 2 Cisco 6504 switches configured as DHCP server to provide IP's to data and voice network. Both switches are configured will full IP subnet scope and it was working fine since 6 years but now suddenly it stops distributing IP addresses which works only after we clear all arp from both switches and disable DHCP on second switch.

Sometime its stops giving IP address only for voice network even though many IP's are free for distribution.

Well we can split the scope to half between both switches but IP conflict was never a problem, i believe cisco ios manages that not to assign same IP from both switch.

What the best way to fix this problem?
0
Comment
Question by:R R
2 Comments
 
LVL 27

Accepted Solution

by:
Predrag Jovic earned 500 total points
ID: 40347470
According to Cisco:

How to Configure DHCP High Availability

There are no configuration tasks. The DHCP high availability features are enabled by default when the redundancy mode of operation is set to SSO.

SSO—Stateful Switchover. SSO refers to the implementation of Cisco IOS software that allows applications and features to maintain a defined state between an active and standby RP. When a switching occurs, forwarding and sessions are maintained. SSO makes an RP failure undetectable to the network.

http://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/sbdhcpha.html#wp1049428
0
 
LVL 1

Author Comment

by:R R
ID: 40347648
Thanks, its already enabled but still switches stop distributing IP.......is there some approach to look at it as we have done a lots checks but no clarity why it stops sometimes for all Vlans and sometime only for Voice vlans.

Is there some limitation on Cisco DHCP on network size like...only 100-200 hosts or few vlans ...etc
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Outlook keeps opened file locked 2 69
What Can't I Connect by FTP??? 27 96
Dns issues 4 35
Current date-time from Available WiFi connections 10 29
I had an issue with InstallShield not being able to use Computer Browser service on Windows Server 2012. Here is the solution I found.
This article will inform Clients about common and important expectations from the freelancers (Experts) who are looking at your Gig.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

786 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question