how to connect SmartAX MT882 and WRT54GC

Discussion in 'Wireless Networks' started by RJK, Sep 2, 2009.

  1. RJK

    RJK Guest

    Having bought a Linksys WRT54GC that I assumed had an adsl modem in it, as
    it was described on ebuyer.com as being "3 units in one,"
    and after fighting with it for a while - it seems that there is no adsl
    modem in it, also there is no PPPoA option in its' settings !

    So, have been trying to connect TalkTalks "free" Huwei SmartAX MT882
    http://www.practicalpc.co.uk/reviews/hard/comms/smartax-mt882.htm
    to this
    http://www.linksysbycisco.com/UK/en/products/WRT54GC with no success.

    Not sure what the blue rj45/"Internet" port on the rear of the WRT54GC is
    for ? ...instruction manual says it's for DSL or Cable !
    ....have only ever seen a rj11 port for adsl/broadband signal, on "home
    gateway" units such as my WAG354G.
    Anyhow, seeing as there seems to be no adsl modem in this WRT54GC unit, and
    will have to connect it to SmartAX MT882, to get internet into main PC and
    off to a wifi enabled ADVENT 6651 laptop - I have several hundred questions,
    .....having never really understood how gateway and ip addresses relate to
    each other. I know, I know, it's simple if you know how but, I've never
    been able to grasp what goes where !

    Does DHCP have to be switched off in one of the units, if so which ?
    .... bearing in mind that the Huwei only has one rj45 port which will have to
    be connected to one of the four yellow rj45 ports on the rear of the WRT54GC
    ? ...didn't get anywhere connecting Huwei rj45 port to Linksys blue
    "Internet" rj45 port !
    i.e. Can the Huwei's DHCP dish up IP addresses for PC's connected to the
    Linksys's 4 (well....3 available), rj45 ports ?

    Does UPNP need to be switched on ?
    Does the DHCP address range have to not overlap, even if DHCP is switched
    off in one of the units ?

    Which mode does the WRT54GC need to be in ?

    Automatic Configuration - DHCP
    Static IP
    PPPoE
    PPTP
    L2TP
    ....and since reflashing it "HeartBeat" ? !!!!

    ....any help hugely appreciated

    TIA

    regards, Richard
     
    RJK, Sep 2, 2009
    #1
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  2. RJK

    Paul Guest

    You've likely already got the manual for the WRT54G.

    http://downloads.linksysbycisco.com/downloads/WRT54GC-EU_V30_UG_NC-WEB.pdf

    There is a manual for the MT882 here. The manufacturer doesn't
    support users directly.

    http://members.driverguide.com/driver/detail.php?driverid=503416

    SmartAX_MT882_V200R002C01B021_User_Manual.pdf , 111 pages, File size 2,345,146 bytes.

    The MT882 is a combined ADSL modem and router. The LAN side of the
    router consists of an Ethernet connector and a USB connector, for
    a total of two computers.

    You don't have to use the router in the MT882. There are also
    some bridged modes of operation. It is possible, if you
    selected the "pure bridged" mode, that the WRT54GC could deal
    with the PPPOE from the LAN side of the MT882.

    I would start, by verifying that the MT882 works with TalkTalk first.
    In this setup, the talktalk account and password, are stored in the
    MT882. This would prove the ADSL is setup and enabled at
    the telco.

    "Setting up your Huawei SmartAX MT882 modem/router"

    http://www.talktalk.co.uk/help/questions/NET_01_07

    If you attempt to connect the MT882 to the WRT54GC, and
    run the MT882 in bridged mode, then the TalkTalk account
    and password would be stored in the WRT54GC. You could
    connect a computer to one of the four wired LAN ports on the
    WRT54GC and use the web interface on the WRT54GC, to set up
    the PPPOE details.

    The only other tiny detail, is whether a straight thru or
    crossover Ethernet cable, is needed between the MT882 and
    WRT54GC. My suspicion is a crossover cable may be needed.
    The cable provided by TalkTalk, for use in their expected
    mode of operation, could be a straight-thru cable, as they're
    expecting a computer to be connected to the Ethernet port on
    the MT882.

    <<< wireless
    /
    ---- RJ11 --- MT882 --- Ethernet ----- (Blue=WAN_port) WRT54GC ------ LAN1
    (Crossover ------ LAN2
    cable ?) ------ LAN3
    ------ LAN4

    Anyway, you've probably got this all running by now. There
    are likely some forums, closer to home, that can help out.

    http://www.talktalkmembers.com/forums/

    http://www.pcadvisor.co.uk/forums/index.cfm?action=showthread&threadid=342550&forumid=1

    Paul
     
    Paul, Sep 2, 2009
    #2
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  3. RJK

    Paul Guest

    (Re-sent. The other server doesn't connect to Microsoft.)

    *******

    You've likely already got the manual for the WRT54G.

    http://downloads.linksysbycisco.com/downloads/WRT54GC-EU_V30_UG_NC-WEB.pdf

    There is a manual for the MT882 here. The manufacturer doesn't
    support users directly.

    http://members.driverguide.com/driver/detail.php?driverid=503416

    SmartAX_MT882_V200R002C01B021_User_Manual.pdf , 111 pages, File size 2,345,146 bytes.

    The MT882 is a combined ADSL modem and router. The LAN side of the
    router consists of an Ethernet connector and a USB connector, for
    a total of two computers.

    You don't have to use the router in the MT882. There are also
    some bridged modes of operation. It is possible, if you
    selected the "pure bridged" mode, that the WRT54GC could deal
    with the PPPOE from the LAN side of the MT882.

    I would start, by verifying that the MT882 works with TalkTalk first.
    In this setup, the talktalk account and password, are stored in the
    MT882. This would prove the ADSL is setup and enabled at
    the telco.

    "Setting up your Huawei SmartAX MT882 modem/router"

    http://www.talktalk.co.uk/help/questions/NET_01_07

    If you attempt to connect the MT882 to the WRT54GC, and
    run the MT882 in bridged mode, then the TalkTalk account
    and password would be stored in the WRT54GC. You could
    connect a computer to one of the four wired LAN ports on the
    WRT54GC and use the web interface on the WRT54GC, to set up
    the PPPOE details.

    The only other tiny detail, is whether a straight thru or
    crossover Ethernet cable, is needed between the MT882 and
    WRT54GC. My suspicion is a crossover cable may be needed.
    The cable provided by TalkTalk, for use in their expected
    mode of operation, could be a straight-thru cable, as they're
    expecting a computer to be connected to the Ethernet port on
    the MT882.

    <<< wireless
    /
    ---- RJ11 --- MT882 --- Ethernet ----- (Blue=WAN_port) WRT54GC ------ LAN1
    (Crossover ------ LAN2
    cable ?) ------ LAN3
    ------ LAN4

    Anyway, you've probably got this all running by now. There
    are likely some forums, closer to home, that can help out.

    http://www.talktalkmembers.com/forums/

    http://www.pcadvisor.co.uk/forums/index.cfm?action=showthread&threadid=342550&forumid=1

    Paul
     
    Paul, Sep 2, 2009
    #3
  4. RJK

    Lem Guest

    You need to do a little better research before you start acquiring
    equipment, even if some of it is free.

    User Guide for SmartAX MT882:
    http://www.talktalkmembers.com/images/downloads/manuals/SmartAXMT882_ADSL_Router_User_Manual.pdf

    No, the WRT54GC does not have a modem. The "3 units" are (1) router, (2)
    switch, and (3) wireless access point. A "gateway" such as your
    WAG354G, has 4 "units" - (1) a DSL modem, (2) router, (3) switch, and
    (4) wireless access point.

    Why are you messing around with the Huwei SmartAX MT882 and the WRT54GC?
    The WAG354G replaces *both* of these units.

    How and where you make the connection between the MT882 and the WRT54GC
    depends on how you configure the MT882.

    In "bridge" mode, the MT882 acts as "just a modem," just translating
    between DSL signals and Ethernet signals. In this configuration, you
    would connect an Ethernet cable between the MT882 and the blue
    rj45/"Internet" port on the WRT54GC, configure the WRT54GC to PPPoE, and
    supply your username/id in the WRT54GC's WAN configuration section. This
    is the configuration that I would use.

    Other configurations of the MT882 have your userid/password stored in
    the MT882. Again, how you connect to the WRT54GC depends on how the rest
    of the MT882's settings are configured.

    If the MT882 is configured with NAT "on" then you ought not connect to
    the Internet port of the WRT54GC because then you would have a "double
    NAT" configuration, which generally is undesirable.

    *IF* the MT882's DHCP server either supplies a range of IP addresses or
    can configured to do so, then you would connect the Ethernet cable
    between the MT882 and one of the 4 yellow LAN ports on the WRT54GC. You
    would then disable the DHCP server on the WRT54GC (you should only have
    one DHCP server per network) and set its *LAN* IP address to a value in
    the same subnet but outside the range supplied by the MT882's DHCP
    server. The MT882 User Guide does not describe how or if its DHCP server
    can be configured. I would guess that at the very least, it supplies
    addresses in the range between 192.168.1.2 - 192.168.1.254. If you can't
    limit the range, set the WRT54GC's LAN IP to something like
    192.168.1.200, which is unlikely to be assigned.

    uPnP can be switched off. If you leave it on and you also have uPnP
    enabled on your computer, you may (or may not, depending on the phase of
    the moon) see a "gateway" icon in "Network Connections" that, if it
    works, will allow you to configure the WRT54GC without having to access
    it using a web browser.

    It's not clear what you re-flashed or what your question about
    "Heartbeat" might be. Some ISPs require a periodic "I'm still here"
    signal or they will disconnect you. This is what is usually meant by
    "Heartbeat."
     
    Lem, Sep 2, 2009
    #4
  5. RJK

    James Egan Guest

    The Linksys only deals in PPPoE and not PPPoA so you can use the
    SmartAX device to make the connection with your ISP and the Linksys to
    distribute the wireless.

    The two devices need to be on the same network so configure them as
    follows :-

    SmartAX
    - Static LAN ip address (say) 192.168.1.1
    - Whatever WAN settings your ISP needs
    - Switch the dhcp server on and configure the pool to be (say)
    192.168.1.50 to 192.168.1.70
    - Connect the RJ45 port to a LAN port on the Linksys.

    Linksys
    - Static LAN ip address (say) 192.168.1.2
    - Leave the WAN settings blank and the WAN port on the device
    disconnected
    - Switch the dhcp server OFF
    - As mentioned above, connect a LAN port to the SmartAX

    All clients
    - Set to obtain an ip address automatically
    - Set to obtain dns information automatically

    In case any of the clients don't work still, set their default gateway
    manually to 192.168.1.1 (the smartax device) and the dns server also
    to 192.168.1.1

    Setting the static ip addresses on the routers can sometimes be
    tricky. Depending on their default settings you might have to
    temporarily connect them to one of your pc's directly while you change
    the static ip address.


    Jim.
     
    James Egan, Sep 3, 2009
    #5
  6. RJK

    RJK Guest

    Many thanks to Paul and Lem,

    Paul is correct, (have now got it all set up and running fine - was unable
    to get to my PC, (and this post), for a couple of days).
    ....and Lem, sorry, I should have explained that the MT882 and WRT54GC are at
    a different (home) address than my own WAG354G i.e. here. I tried to keep
    my OP as short as possible, as it's possible to write a small book, (which I
    usually do), trying to cover all relevant information !

    I had advised a friend to buy a Home Gateway, (similar to my own/old
    WAG354G), as he'd recently bought an Advent 6651 Laptop - and wanted to use
    it with wi-fi, and in view that his MT882 has no wi-fi in it, he bought the
    WRT54GC which turned out not to have an adsl modem in it, so we were unable
    to use it as we wanted i.e. a simple replacement for his MT882

    In the distant past, (here at my home address), I fought with an Orange
    Livebox+WAG354G, so had a rough idea of how to set up his MT882+WRT54GC (at
    his home address).

    So it took 3 visits in all, to finally get it set up ! On second visit, to
    collect and bring the WRT54GC back here and fighting with it on my 2nd PC,
    and finally spotting that the blue "Internet" port, (beside the 4 yellow
    rj45 ports), seemed to be an rj45 port - and not a rj11 port - and reading
    in the WRT54GC manual that the "blue" port is for "DSL and Cable," and after
    discovering that adsl modem/PPPoA was not on offer in it - the only hardware
    configuration option seemed to be to leave the MT882 in place and connect
    the WRT54GC to it.

    It would have been so helpful if ebuyer.com had contained a few words, in
    its' WRT54GC item description, that this unit does not contain an
    adsl/PPPoA (UK) modem ! ...or words to that effect !

    Anyhow, both your posts contain VERY useful information, and I am grateful
    for your responses.

    I've left DHCP on in MT882,
    DHCP off in WRT54GC, so that it's acting as a dumb router,
    single rj45 port on MT882 is connected to yellow rj45 port 1 on WRT54GC,
    his main PC is connected to yellow rj45 port 2 on WRT54GC, (thank heavens
    for units auto-detecting straight thru/crossover cables ...I think ...etc).
    ....laptop / wifi is working fine - after tweaking both to WPA/tkip and
    setting passphrase etc., ...and fighting with firewalls e.g. running AVG's
    firewall configuration wizard etc.

    ....I was going to set up MAC access codes but, thought I'll leave well
    enough alone !

    Many thanks again,

    regards, Richard
     
    RJK, Sep 3, 2009
    #6
  7. RJK

    RJK Guest

    ....many thanks, have now fathomed it out -
    MT882 stays in place and, WRT54GC working as a dumb router etc.

    regards, Richard
     
    RJK, Sep 3, 2009
    #7
  8. RJK

    James Egan Guest

    That's right. To be precise the WRT54GC is acting as a "switch". It
    isn't doing any routing at all in this configuration.

    Cheers


    Jim.
     
    James Egan, Sep 3, 2009
    #8
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