User's Manual

Chapter 4 Broadband
B222s User’s Guide
38
DHCP Opt ion 138 allows t he CAPWAP m anagem ent request ( from t he AP in m anaged AP m ode) to
reach t he AP controller in a different subnet , as shown in t he following figure.
Figure 16 CAPWAP and DHCP Option 138
Notes on CAPWAP
This sect ion lists som e additional feat ures of ZyXEL’s im plem ent ation of the CAPWAP prot ocol.
• When the AP cont roller uses it s int er nal Rem ote Authent 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
clients.
• I f a m anaged AP’s link t o t he AP cont roller is broken, the m anaged AP continues t o use t he
wir eless sett ings wit h which it was last provided.
4.1.3 Before You Begin
You m ay need t o know your I nt ernet access set tings such as LTE APN, WAN I P address and SI M
card’s PI N code if the I N TERN ET light on your LTE Device is off. Get t his inform ation from your
service provider.
4.2 The Broadband Screen
The LTE Device m ust have a WAN int erface t o allow users t o use t he LTE connect ion to access the
I nt ernet. Use t he Br oa dba nd screen to view or m odify a WAN int erface. You can also configure t he
LTE Device as par t of a Cont rol And Provisioning of Wireless Access Points ( CAPWAP) net w ork in t his
screen.
SUBNET 1 SUBNET 2
AP
CONTROLLER
MANAGED
AP
DHCP
SERVER
+ OPTION 138
CAPWAP
TRAFFIC
(STATIC IP)