DHCP Opt ion 138 allows t he CAPWAP m anagem ent request ( from t he AP in m anaged AP m ode) t o
reach t he AP cont roller in a different subnet , as shown in t he following figure.
Figure 34 CAPWAP and DHCP Opt ion 138
SUBNET 1
CONTROLLER
(STATIC IP)
7.2.4 Notes on CAPWAP
This sect ion list s som e addit ional feat ures of ZyXEL's im plem ent at ion of t he CAPWAP prot ocol.
•
When t he AP cont roller uses it s int ernal Rem ot e Au t hent icat ion Dial I n User Service ( RADI US)
server, m anaged APs also use t he AP cont roller 's aut hent icat ion server t o aut hent icat e wireless
client s.
•
I f a m anaged AP's link t o t he AP cont roller is bro ken, t he m anaged AP cont inues t o use t he
wireless set t ings wit h which it was last provided.
7.3 The Management Mode Screen
Use t his screen t o configure t he device as an a cont roller of m anaged devices, a st andalone AP , or a
m anaged AP .
Not e: Aft er you change t he operat ion m ode, t he device reset s t o it s default set t ings for
t he m ode you set it t o, including t he I P address of 192.168.1.2. I t also backs up it s
configurat ion t o a xxx- backup.conf file where xxx denot es t he m ode t he device was
previously using.
NWA3000-N Series User's Guide
CAPWAP
TRAFFIC
AP
Chapter 7 Management Mode
SUBNET 2
DHCP
SERVER
+ OPTION 138
MANAGED
AP
95