Velocity Reviews - Computer Hardware Reviews

Velocity Reviews > Newsgroups > Computing > Cisco > DHCP across routers

Reply
Thread Tools

DHCP across routers

 
 
lelo
Guest
Posts: n/a
 
      11-28-2005
We have a network at headquarters that resides on a 10.16.248.0 subnet.
That network is connected via frame relay to 7 remote sites on a
10.17.1.0, 10.17.2.0, 10.17.3.0, up to 10.17.7.0 subnet. To keep the
subnets uniform at the remote sites and at HQ we want to change the
remote site subnets to 10.16.1.0, 10.16.2.0, 10.16.3.0, up to
10.16.7.0. Each subnet at each location gets it's ip address from a
dhcp server at that particular site. My question is can dhcp request
and ip address allocations cross router from remote site to
headquarters or vice versa? We want our address allocation to remain
the same (site specific dhcp)

 
Reply With Quote
 
 
 
 
Phil Schuman
Guest
Posts: n/a
 
      11-28-2005

"lelo" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
> We have a network at headquarters that resides on a 10.16.248.0

subnet.
> That network is connected via frame relay to 7 remote sites on a
> 10.17.1.0, 10.17.2.0, 10.17.3.0, up to 10.17.7.0 subnet. To keep the
> subnets uniform at the remote sites and at HQ we want to change the
> remote site subnets to 10.16.1.0, 10.16.2.0, 10.16.3.0, up to
> 10.16.7.0. Each subnet at each location gets it's ip address from a
> dhcp server at that particular site. My question is can dhcp request
> and ip address allocations cross router from remote site to
> headquarters or vice versa? We want our address allocation to remain
> the same (site specific dhcp)
>

normally DHCP requests are blocked at the router - since they are
"broadcasts",
however, you can add a "helper relay" definition for each router
and specify where to "forward" the DHCP requests...
We had the same setup - for our 50 remote sites -
and served they all from a central location - actually 2 locations -



 
Reply With Quote
 
 
 
 
Hansang Bae
Guest
Posts: n/a
 
      11-28-2005
lelo wrote:

> We have a network at headquarters that resides on a 10.16.248.0
> subnet. That network is connected via frame relay to 7 remote sites
> on a 10.17.1.0, 10.17.2.0, 10.17.3.0, up to 10.17.7.0 subnet. To keep
> the subnets uniform at the remote sites and at HQ we want to change
> the remote site subnets to 10.16.1.0, 10.16.2.0, 10.16.3.0, up to
> 10.16.7.0.


It's in the 10.0.0.0 address space so I'm not sure what the benefit of
doing this is. Unless you're just using it "as an example only"

> Each subnet at each location gets it's ip address from a
> dhcp server at that particular site. My question is can dhcp request
> and ip address allocations cross router from remote site to
> headquarters or vice versa? We want our address allocation to remain
> the same (site specific dhcp)


You can if you use "ip helper-address IP_OF_DHCP_SERVER" at each
ethernet interface. But when you do this, it actually opens up a lot
of unwanted broadcasts packets by default. So you should lock it back
down.

See: http://www.cisco.com/warp/public/473...tm#xtocid88297



--

hsb


"Somehow I imagined this experience would be more rewarding" Calvin
**************************ROT13 MY ADDRESS*************************
Due to the volume of email that I receive, I may not not be able to
reply to emails sent to my account. Please post a followup instead.
************************************************** ******************
 
Reply With Quote
 
 
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wireless DHCP clients cannot obtain an IP address from the DHCP se =?Utf-8?B?SGVpbkQ=?= Wireless Networking 0 01-08-2006 03:41 PM
cisco routers and netgear routers Jon L. Miller Cisco 2 02-05-2005 02:49 AM
Connect 2 routers (wireless and regular routers) Dineyar Buhariwala Wireless Networking 1 11-24-2004 01:37 PM
How to block bootp/dhcp broadcasting on cisco routers? Faustino Dina Cisco 4 09-28-2004 11:10 PM
enabling dhcp on routers LeRoy Cisco 2 04-03-2004 01:37 PM



Advertisments