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WAN down for ~30 secs on client DHCP request

Discussion in 'Tomato Firmware' started by AeN0, Feb 23, 2011.

  1. AeN0

    AeN0 Network Guru Member

    Hello,

    Whenever one of my client device connect to the router (eth plugs in, activate wifi on phone) and does a DHCP request, all outgoing traffic (WAN) is disabled during an approx. 30secs. After that, everything is back to normal...

    Through these 30 secs, LAN networking is still OK.

    Someone told me it could be a broadcast storm but my wireshark is not capturing so much of broadcast while the WAN is out.

    I'm having this problem coming back each time I'm trying something advanced on my WNR3500L (and even on a WRT54GS v4) and on different versions of Tomato (Vanilla/K2.6).

    So far, this problem happens when I tried (separately) to do IPv6 brouting (=IPv4 Nat + IPv6 native) and more recently dual wan IPv4 ...

    I can't see the relation between those two...

    Big thanks.
     
  2. AeN0

    AeN0 Network Guru Member

    More infos :

    My third VLAN (n°3) for for my second WAN was using the same MAC address that my first WAN.

    I changed it to an other one but I still have the bug.

    Second guess :

    When I set the interface up and just after down
    Code:
    Feb 23 20:03:24 router-n3500 user.debug kernel: vlan3: add 01:00:5e:00:00:01 mcast address to master interface
    Feb 23 20:03:24 router-n3500 user.debug kernel: vlan3: add 33:33:00:00:00:01 mcast address to master interface
    Feb 23 20:03:45 router-n3500 user.debug kernel: vlan3: del 33:33:00:00:00:01 mcast address from vlan interface
    Feb 23 20:03:45 router-n3500 user.debug kernel: vlan3: del 33:33:00:00:00:01 mcast address from master interface
    Feb 23 20:03:45 router-n3500 user.debug kernel: vlan3: del 01:00:5e:00:00:01 mcast address from vlan interface
    Feb 23 20:03:45 router-n3500 user.debug kernel: vlan3: del 01:00:5e:00:00:01 mcast address from master interface
    
    Could it be related to my problem ?

     
  3. AeN0

    AeN0 Network Guru Member

    Oh my ******** god. I think I just found the problem : my ISP modem is buggy in full bridge mode! I don't why but I switched the modem to router mode and no more bug.

    Dual WAN (cable + DSL). This is just awnsome !!

    I was researching on this problem for almost 2 years!
     
  4. Fodin

    Fodin Networkin' Nut Member

    I have Netgear 3500L router with v1.28.7475 MIPSR2-Toastman-RT K26 USB VPN-NOCAT
    I need two WAN, and I tried to set vlan ports by these commands:
    nvram set vlan1ports="3 2 1 8*"
    nvram set vlan3ports="4 8"
    nvram commit
    All look ok until I restart router. After reboot I see this annoying thing:
    vlan1ports=4 3 2 1 8*
    vlan3ports=4 8
    and nothing works.
    How can I fix it? I used firmware from tomatousb.org before. It has the same problem.
    Thanks.
     

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