Extreme Networks Summit WM Technical Reference Manual page 21

In this setup there are four different areas in which DHCP must be considered:
Figure 2: Areas needing consideration for DHCP
AP deployment
network 1
e.f.g.h
B
Table 8: Use of DHCP
Area Description of use for DHCP
A DHCP INFORM messages are periodically sent on all physical ports (esa0-1 on WM1000, esa0-3 on
WM200/2000 Summit WM Controllers). DHCP INFORM messages are NOT requests for addressing on
that segment. These messages use DHCP INFORM option 78 to provide information to other Summit
WM Controllers deployed on the same segment.
For setups that use multiple Summit WM Controllers a DHCP server in area A is required to answer
requests for option 78 to allow availability and mobility to work. No addresses will be consumed.
For a single Summit WM Controller setup a DHCP server in this area is not required.
DHCP services for this area MUST be provided external to the Summit WM Controller.
B In general APs that are used with the Summit WM Controller may use either a static or dynamically
assigned IP address.
For APs that are connected to the same subnet as the Summit WM Controller initial discovery can take
place directly using multicast. However, the deployer of the APs may still wish to utilize DHCP
addressing for the APs. Additionally, support for option 78 may be used in this area to aid in the
initial discovery of the Summit WM Controller by the APs.
DHCP services for this area MUST be provided external to the Summit WM Controller.
Summit WM Technical Reference Guide, Software Version 5.1
A
AP deployment
network 2
i.j.k.l
C
D
Wireless
laptop
Core network
a.b.c.d
DHCP
Summit WM-AD
wireless
network
w.x.y.z
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