Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 650)

Brocade IP DHCP Relay overview
The Brocade IP DHCP Relay feature on allows forwarding of requests and replies between DHCP
servers and clients connected to the switch when these servers and clients are not on the same
subnet.
You can configure the Brocade IP DHCP Relay feature on any L3 interface to forward requests and
replies between DHCP servers and clients connected to the switch when these servers and clients are
not on the same subnet. An L3 interface could be the switch front-end Ethernet interface (VE port) or
physical interface. The following figure shows an example of a VCS cluster configuration with DHCP
servers and clients located on different subnets.
FIGURE 77 VCS cluster with clients and servers
The previous figure illustrates a VCS cluster with clients and servers passing data between different
subnets. Note the following examples of configurations supported and not supported by the IP DHCP
Relay feature.
Supported configuration examples:
• Local DHCP server. DHCP Client 1 and Server 1 are on the same rbridge, but on different subnets.
This configuration supports the IP DHCP Relay feature.
• Remote DHCP server. Client 1 and Server 2 are on different rbridges, but on different subnets. This
configuration supports the IP DHCP Relay feature.
• DHCP server across a WAN. Client 1 and Server 5 are on different subnets across the WAN.
• DHCP server is in a different Virtual Routing and Forwarding instance (VRF). Client 1 and Server 2
are in different VRFs.
Brocade IP DHCP Relay overview
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