Solved

relationship between DHCP Scope "003 router" value and  Cisco switch Vlan interface IP address

Posted on 2014-09-24
2
767 Views
Last Modified: 2014-11-06
Our Cisco switch has VLANs and gets DHCP IPs from DHCP server.

I use the following command to create new VLAN.
conf t
int vlan 12
ip address 192.168.12.1 255.255.255.0
ip helper-address 192.168.2.50

When I define the DHCP scope on the DHCP server(192.168.2.50), what should I fill in for the value in "003 router"?

I would like to understand what is the relationship between DHCP Scope "003 router" value and  Cisco switch Vlan interface IP address.

Is this "003 router" value equal to the VLAN interface IP address? Thanks
0
Comment
Question by:tonitoni99
2 Comments
 
LVL 27

Accepted Solution

by:
Predrag Jovic earned 250 total points
ID: 40343271
002 Time Offset
003 Router - For setting default gateway
004 Time Server
005 Name Servers
006 DNS Servers
007 Log Servers
044 WINS/NBNS Servers - Used if the client is not manually configured for the WINS server.
046 WINS/NBT Type - NetBIOS name configuration designation of B,P, M, or H node.
047 NetBIOS Scope ID - Set so NBT hosts communicate only with other similarly configured hosts.

http://www.comptechdoc.org/os/windows/ntserverguide/ntsdhcp.html


So if your Cisco switch Vlan interface IP address is default gateway for that VLAN then 003 router should be VLAN's interface IP address. And since on that VLAN interface you have configured ip helper-address  -  most likely that VLAN interface is default gateway for that VLAN.
0
 
LVL 16

Assisted Solution

by:vivigatt
vivigatt earned 250 total points
ID: 40343721
To keep it simple, the default gateway for this VLAN is its IP interface.
All devices on this VLAN must send packets that are aimed outside the VLAN to this interface, and the routing device should be able to route them correctly, assuming that ip routing is enabled.
So in your case, DHCP option 3 for the associated scope must be 192.168.12.1
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Is this QoS Correct on this  CISCO 3825 Router 1 30
What is CPU in "RP/0/RSP0/CPU0:router#"? 6 27
Classlful vs Classless subneting 18 61
Cost effective dual wan w/ qos 5 25
There are times where you would like to have access to information that is only available from a different network. This network could be down the hall, or across country. If each of the network sites have access to the internet, you can create a ne…
Creating an OSPF network that automatically (dynamically) reroutes network traffic over other connections to prevent network downtime.
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…

919 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

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now