you may add more eth and run multi chillsipot but i never test..

if else  you may install 2 chillispot servers with 1 radius to get 2 class ip.

(1)How can i check weather AP's getting IP Address from chilli or not???

AP not get IP from chilli , it 's only bridge for chillispot to walk cross to client..
And please disable dhcp on wrt54gl

(2)Chillispot will give IP address to Access Points but what about wifi clients  means who will give IP address to clients which are connecting via Access Point as chillispot requires no other DHCP server in the network???

as anwser above

(3)What authentication method to be selected in access point configuration like open,shared access, wpa/eap etc. i think chillispot is going to manage authentication and accounting then is it necessary to define radius server IP address and secret in access point ???? because in AP there is one option WPA/EAP which gives me option of defining radius server.but  when i select this option then before connecting to AP it looks for secure certificates and i don't want to involve certificates in this. I just want simple setup with chillispot which i have done with Linksys.

you shoose set to open cause chillispot will security for u..

On my way i add more
EXTIF="eth1"
EXTIF2="eth2"

and
$IPTABLES -t nat -A POSTROUTING -o $EXTIF -j MASQUERADE
$IPTABLES -t nat -A POSTROUTING -o $EXTIF2 -j MASQUERADE

and use iproute to manage net sharing

nevr test..

Chillispot knows only what radius tells..

So..............  Nothing is possioble :-D

How chillispot know which user has good cert?

It 's not squid to drop radius upload attribute it ' s bug on chillispot.
I use coova-chilli and set iptables for squid below

##Allow transparent proxy (wiboon 1/2)
$IPTABLES -A INPUT -p tcp -m tcp --dport 3128 --syn -j ACCEPT

##Allow transparent proxy (wiboon 2/2)

$IPTABLES -t nat -A PREROUTING -i tun0 -p tcp -m tcp --dport 3128 --syn -j DROP
#$IPTABLES -t nat -A PREROUTING -i tun0 -p tcp -m tcp -d 10.50.0.0/16 --dport 80 -j RETURN
#$IPTABLES -t nat -A PREROUTING -i eth1 -p tcp -m tcp --dport 443 --syn -j DROP
#$IPTABLES -t nat -A PREROUTING -i tun0 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 312

it 's work pretty good man..

It 's very niceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee...

chekc your uamsecret . is it match with your server?

I have tested and resolved it.

I run it on coova-chilli v.1.0.12 .

It can limits both download and upload. very niceeeeeeeeeeeeeeeeeeeeeee

and GREAT.................................

Check at radacct, chillispot still sends data to radius . if not it 's mean your radius is error..

I always comment the dns like below

# TAG: dns1
# Primary DNS server.
# Will be suggested to the client.
# If omitted the system default will be used.
# Normally you do not need to uncomment this tag.
#dns1 195.130.129.162

# TAG: dns2
# Secondary DNS server.
# Will be suggested to the client.
# If omitted the system default will be used.
# Normally you do not need to uncomment this tag.
#dns2 195.130.130.162

Please try this