"ip helper-address x.x.x.x" is all you need on the branch office router interface. The statement converts the broadcast into a directed request to the target specified.
If you have multiple VLAN's in the regional offices, each requiring DHCP services, you'll need to add "ip helper-address" statements to each of the VLAN sub-interfaces on the router.
Of course, you'll need to configure the DHCP server appropriately. It'll know which DHCP lease to serve the IP addresses from.
You can also use multiple "ip helper-address" statements too, for multiple DHCP servers. However, you'll need to carve up the DHCP lease pools, so that the leases don't clash.
One problem we've experienced - PC's may not be able to talk across the LAN segment if the WAN link dies, so you may want to have a think about how you're going to serve out IP addresses during WAN failures.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...