YazFi Guest Wireless manual DHCP setup always getting br0 subnet

[drewski22785]

This isn't exactly a YazFi issue, becasue YazFi works doing this. But since YazFi does this properly, I am hoping someone can tell me what I am missing in my steps.

I am at the moment just manually trying to setup DHCP for a guest wireless interface.

I enabled wl0.2, and via nvram set lanaccess=on and restarted wireless. I used ifconfig to set the ip on the interface 192.168.6.1/24. I added wl0.2 to the br0 even though it was already there. I have not tried removing it from br0 but didn't think that was necessary since they are a part of br0 with YazFi.

Here is my dnsmasq config (copy paste from YazFi:

### Start of script-generated configuration for interface wl0.2 ###
interface=wl0.2
dhcp-range=wl0.2,192.168.6.10,192.168.6.254,255.255.255.0,86400s
ddhcp-option=wl0.2,3,192.168.6.1
dhcp-option=wl0.2,6,8.8.8.8,8.8.4.4
### End of script-generated configuration for interface wl0.2 ###

I restarted dnsmasq and the config shows up in the config file.

So far everything still goes to the br0 dhcp address, I have no idea what I am missing at this point. Anything obvious standout? Thanks!

 

[drewski22785]

Okay so I installed tcpdump and also removed the wl0.2 interface from br0 to be standalone and here are the results:

admin@RT-AC3100-7180:/tmp/home/root# tcpdump -i wl0.2 port 67 or port 68 -e -n -
vv
tcpdump: listening on wl0.2, link-type EN10MB (Ethernet), capture size 262144 bytes
14:02:53.617787 76:ef:2d:56:aa:25 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: (tos 0x0, ttl 255, id 52048, offset 0, flags [none], proto UDP (17), length 328)
    0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 76:ef:2d:56:aa:25, length 300, xid 0x99bb04cb, Flags [none] (0x0000)
          Client-Ethernet-Address 76:ef:2d:56:aa:25
          Vendor-rfc1048 Extensions
            Magic Cookie 0x63825363
            DHCP-Message Option 53, length 1: Discover
            Parameter-Request Option 55, length 8:
              Subnet-Mask, Classless-Static-Route, Default-Gateway, Domain-Name-Server
              Domain-Name, URL, Option 119, Option 252
            MSZ Option 57, length 2: 1500
            Client-ID Option 61, length 7: ether 76:ef:2d:56:aa:25
            Lease-Time Option 51, length 4: 7776000
14:02:53.618755 4c:ed:fb:ad:71:82 > 76:ef:2d:56:aa:25, ethertype IPv4 (0x0800), length 342: (tos 0x0, ttl 64, id 46682, offset 0, flags [none], proto UDP (17), length 328)
    192.168.6.3.67 > 192.168.6.240.68: [udp sum ok] BOOTP/DHCP, Reply, length 300, xid 0x99bb04cb, Flags [none] (0x0000)
          Your-IP 192.168.6.240
          Server-IP 192.168.6.3
          Client-Ethernet-Address 76:ef:2d:56:aa:25
          Vendor-rfc1048 Extensions
            Magic Cookie 0x63825363
            DHCP-Message Option 53, length 1: Offer
            Server-ID Option 54, length 4: 192.168.6.3
            Lease-Time Option 51, length 4: 86400
            RN Option 58, length 4: 43200
            RB Option 59, length 4: 75600
            Subnet-Mask Option 1, length 4: 255.255.255.0
            BR Option 28, length 4: 192.168.6.255
            Domain-Name-Server Option 6, length 8: 8.8.8.8,8.8.4.4
            Default-Gateway Option 3, length 4: 192.168.6.1

So the request is there, but, for some reason my device is not picking up the ip. When wl0.2 is on br0 I get the br0 dhcp config without any issue. Any thoughts why my device isn't getting the dhcp request back even though your see it being sent?

I also see a proper arp entry so this should be working?

? (192.168.6.240) at 76:ef:2d:56:aa:25 [ether] on wl0.2