Posted: Fri May 03, 2024 3:04 Post subject: 3200ACM with Motorolla Surfboard SB6121 - no wan ip
hi - I'm crap at networking but looking to learn, however I'm completely stuck.
I have a linksys 3200ACM with build r52720 installed on one partition, stock firmware on the other.
When I boot into the linksys stock with the WAN interface cabled into the back of my SB6121, I get an IP over the WAN with auto dhcp from my SB6121 modem. Internet connectivity works for anything connected via wifi or LAN. I can see the modem has the correct bit lit up to indicate internet connectivity.
When I boot into the DDWRT partition I can connect via wifi or LAN to the 3200ACM to bring up the web interface, however the WAN doesn't get an IP so I can't connect to the internet. I can also see the modem is not lit up correctly.
Clearly this isn't a cabling issue, it's something to do with my DDWRT configuration, but I'm not smart enough to know what the problem is.
I don't think this is a MAC issue because I can take my laptop into the modem and get to the internet, and then take that out, restore cabling between my modem and WAN on the stock firmware and get straight on with that setup too, so the MAC isn't the blocker.
Really hope someone can help me with this as I really need the extra controls WRT offers.
Perhaps I'm doing something obvious wrong, if so please enlighten me.
Here is the dump from the stock firmware of the config when connected to the internet over WAN:
Router Information
Firmware Version: 1.0.8.199531
Serial Number: 1981260BA05894
Current Router Time: Thursday, 02 May 2024 17:10:30 (GMT -07:00)
Current Browser Time: Thursday, 02 May 2024 20:10:31 (GMT -04:00)
Internet MAC Address: E8:9F:80:1A:97:58
Server Name: router
Host Name: router
Domain Name:
Linksys Smart Wi-Fi Services
Status: Stopped
Internet Connection (IPv4)
Connection Type: Automatic Configuration - DHCP
Internet Address: 199.102.xxx.yyy
Subnet Mask: 255.255.255.240
Default Gateway: 199.102.xxx.yyy
DNS1: 216.252.69.1
DNS2: 216.252.70.1
DNS3:
MTU: Auto
DHCP Lease Time: 1440 Minutes
Internet Connection (IPv6)
Connection Type: Connecting
Internet Address:
Default Gateway:
DNS1:
DNS2:
DNS3:
DHCP Lease Time:
Local Network
Local MAC Address: E8:9F:80:1A:97:58
IPv4 Address: 192.168.1.1
IPv4 Subnet Mask: 255.255.255.0
IPv6 Link-Local Address: fe80:0000:0000:0000:ea9f:80ff:fe1a:9758
Prefix Address:
DHCP Server
DHCP Server: Enabled
Start IP Address: 192.168.1.100
End IP Address: 192.168.1.199
Client lease time: 1440 Minutes
Static DNS 1:
Static DNS 2:
Static DNS 3:
WINS:
You should be getting a WAN IP from a DD-WRT stock configuration (WAN set to DHCP). Have you tried a factory reset on the DDWRT side? Does your ISP require a vlan ID on the WAN port that is already configured on the stock OS? _________________ - Linksys EA8500: I-Gateway, AP/VAP 5ghz only r57753: Features: WDS-AP, VLANs, Samba, WG, Entware
- Linksys EA8500: WDS Station x2 - r57753
- Netgear R6400v2: WAP/VAP 2.4ghz only w/VLANs over single trunk port. r57753
- Linksys MX4300 (WAP/VAP (7)) - r58244: Features in use: multiple VLANs over single trunk port
- Linksys MR7350: Testing r58244
- Linksys Velop WHW03v1 x2: OpenWRT w/GRETAP tunnel for VLANs on VAPs
- OSes: Fedora 39, 9 RPis (2,3,4,5), 20 ESP8266s: Straight from Amiga to Linux in '95, never having owned a Windows PC.
You should be getting a WAN IP from a DD-WRT stock configuration (WAN set to DHCP). Have you tried a factory reset on the DDWRT side? Does your ISP require a vlan ID on the WAN port that is already configured on the stock OS?
Thanks for replying.
It's a factory install, wiped the nvram and fresh firmware install.
The stock firmware is also a fresh installation so it's not like I have some bespoke config on the stock side, I also logged in to check and VLAN is disabled.
You should be getting a WAN IP from a DD-WRT stock configuration (WAN set to DHCP). Have you tried a factory reset on the DDWRT side? Does your ISP require a vlan ID on the WAN port that is already configured on the stock OS?
Thanks for replying.
It's a factory install, wiped the nvram and fresh firmware install.
The stock firmware is also a fresh installation so it's not like I have some bespoke config on the stock side, I also logged in to check and VLAN is disabled.
Kinda weird, eh? Has me stumped.
Well, for one your ddwrt build is a little old. The latest is 56182. Try updating it first, then reboot, reset and boot again. Then check your results. _________________ - Linksys EA8500: I-Gateway, AP/VAP 5ghz only r57753: Features: WDS-AP, VLANs, Samba, WG, Entware
- Linksys EA8500: WDS Station x2 - r57753
- Netgear R6400v2: WAP/VAP 2.4ghz only w/VLANs over single trunk port. r57753
- Linksys MX4300 (WAP/VAP (7)) - r58244: Features in use: multiple VLANs over single trunk port
- Linksys MR7350: Testing r58244
- Linksys Velop WHW03v1 x2: OpenWRT w/GRETAP tunnel for VLANs on VAPs
- OSes: Fedora 39, 9 RPis (2,3,4,5), 20 ESP8266s: Straight from Amiga to Linux in '95, never having owned a Windows PC.
Oh, and you will want to flash this from the stock firmware side (NOT DDWrt), otherwise you will overwrite it. _________________ - Linksys EA8500: I-Gateway, AP/VAP 5ghz only r57753: Features: WDS-AP, VLANs, Samba, WG, Entware
- Linksys EA8500: WDS Station x2 - r57753
- Netgear R6400v2: WAP/VAP 2.4ghz only w/VLANs over single trunk port. r57753
- Linksys MX4300 (WAP/VAP (7)) - r58244: Features in use: multiple VLANs over single trunk port
- Linksys MR7350: Testing r58244
- Linksys Velop WHW03v1 x2: OpenWRT w/GRETAP tunnel for VLANs on VAPs
- OSes: Fedora 39, 9 RPis (2,3,4,5), 20 ESP8266s: Straight from Amiga to Linux in '95, never having owned a Windows PC.
Joined: 08 May 2018 Posts: 14849 Location: Texas, USA
Posted: Fri May 03, 2024 3:41 Post subject:
Power both down for at least 5 minutes. Power up cable modem. Wait at least 5 minutes or until fully sync'd with your ISP. Power up WRT3200ACM booting into DD-WRT, not stock. Quite honestly, there is no stock firmware on either of mine. It is completely moot for recovery. _________________ "Life is but a fleeting moment, a vapor that vanishes quickly; All is vanity"
Contribute To DD-WRT Pogo - A minimal level of ability is expected and needed... DD-WRT Releases 2023 (PolitePol)
DD-WRT Releases 2023 (RSS Everything)
----------------------
Linux User #377467 counter.li.org / linuxcounter.net
Lex says:
"The latest is 56182"
Do not use it!
Use 56029 on the WRT3200ACM - the 2 latest releases have issues on Marvell.
"Does your ISP require a vlan ID on the WAN port that is already configured on the stock OS?"
This is the case with SOME ISP's here in Australia.
Unsure where OP is. _________________ ------------------------------------
Netgear XR500 Kong-NSS/OpenWrt (Gateway)
Linksys EA8500 OpenWrt 23.05.4 (Wired AP)
Linksys WRT3200ACM DD-WRT r58283 (Spare Gateway)
Netgear WNDR3700v4 DD-WRT r57515 (spare Gateway)
Photos: https://www.flickr.com/photos/nickant44/albums
Well, for one your ddwrt build is a little old. The latest is 56182. Try updating it first, then reboot, reset and boot again. Then check your results.
It's May 2023, the hardware came out years and years ago.
This is the most basic functionality, it surely worked by May 2023.
Power both down for at least 5 minutes. Power up cable modem. Wait at least 5 minutes or until fully sync'd with your ISP. Power up WRT3200ACM booting into DD-WRT, not stock. Quite honestly, there is no stock firmware on either of mine. It is completely moot for recovery.
I can get to the net via the modem from my pc and laptop by simply taking the cable plugged into the router WAN and (I'm on linux) running ifdown / ifup, without any need to have things turned off for a period of time, so I highly doubt this is MAC or timing related.
Your WAN IP suggests your ISP modem is in bridge mode.
The modem has to learn a new MAC address.
Switch both router and ISP modem off, meaning disconnect power.
After 5 minutes power up the ISP modem.
Wait 5-10 minutes and after that power up the DDWRT router.
Thanks - I did just try this, just back online now but not via DDWRT.
I turned off the modem and router, unplugged the modem from the router WAN.
Left for at least 5 minutes closer to 10.
Turned on the modem, left it again for 5 minutes.
Then plugged the cat 5 back into the router WAN/modem, and turned on the router.
No WAN IP.
One other point that might be relevant - the SB6121 manual has the following text:
Quote:
Amber: A device, computer, or hub
is connected to the Ethernet
(10Base-T) or Fast Ethernet
(100Base-T) port
Blue: High-speed Gigabit Ethernet
(1000Base-T) connection from the
SB6121 to your PC
I have an amber icon when on the stock firmware, probably not an issue as I'd expect autoneg but figured I'd mention it.
I've also tried disconnecting my modem from everything including the coax, connecting to it with a laptop via rj45 and then clicking reset to defaults in an attempt to "clear" the MAC address.
And I've also tried cloning the MAC used by linksys on stock as the DDWRT boot seems to increment the MAC by +1.
