Solved

DHCP And Layer 3 Switch Issue

Posted on 2013-10-31
6
352 Views
Last Modified: 2013-11-01
Hardware for switch is HP ProCurve 3500yl.  DHCP server is a Windows 2008 R2 guest OS.

DHCP Server is sitting on IP 172.30.8.10/22 with default gateway set to 172.30.8.1 (port on the 3500 switch.)

Configured DHCP scope to hand out IP addresses in the 172.30.9.1 to 172.30.9.254 for our phone system.  Remote tech has laptop and phone plugged in to above named switch.

Phone and laptop do not receive any dhcp addresses.  I had the tech configure the laptop with a static ip of 172.30.9.99 and she can ping 172.30.8.10 without issue.  However, we cannot ping 172.30.9.99 from either the switch or from 172.30.8.10 (the server). What am I missing?
0
Comment
Question by:swlaurie
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 46

Expert Comment

by:Craig Beck
ID: 39614941
Do you have DHCP snooping configured on the switch?

Have you authorized the DHCP server?
0
 

Author Comment

by:swlaurie
ID: 39614960
Server is not part of the domain. Should it be added and then DHCP authorized?
0
 
LVL 46

Expert Comment

by:Craig Beck
ID: 39615006
Well if there are no other DHCP servers on the same subnet you technically shouldn't have to.

This might be worth a read...

http://technet.microsoft.com/en-us/library/cc781697(v=ws.10).aspx
0
Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

 
LVL 17

Expert Comment

by:pergr
ID: 39616039
Any chance the laptop has Windows Firewall enabled, blocking the ping?
0
 
LVL 17

Expert Comment

by:pergr
ID: 39616041
Also, double check that you have the same subnet mask configured everywhere.

/22
255.255.252.0
0
 
LVL 4

Accepted Solution

by:
askincakir earned 500 total points
ID: 39616354
Hi,
By default there is no any config about it but you can check about dhcp snooping config.
DHCP snooping is a config to avoid un authorized DHCP servers to offer an ip addresses.
It is done in swiches. If dhcp snooping is configured on switches you have to say that port which is connected to dhcp server ( windos) is a trust port for dhcp snooping. All the rest ports a untrusted for dhcp offering.

Br,
0

Featured Post

Percona Live Europe 2017 | Sep 25 - 27, 2017

The Percona Live Open Source Database Conference Europe 2017 is the premier event for the diverse and active European open source database community, as well as businesses that develop and use open source database software.

Question has a verified solution.

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

Resolve DNS query failed errors for Exchange
Use of TCL script on Cisco devices:  - create file and merge it with running configuration to apply configuration changes
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
Suggested Courses
Course of the Month8 days, 14 hours left to enroll

615 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