TFTP download problem with IP addressing - TCP-IP

This is a discussion on TFTP download problem with IP addressing - TCP-IP ; Trying to TFTP from 2 NICs of a PC (windows 2000) to 2 NICs on an embedded device over class C private network. But only one NIC seems to work properly. PC NIC 1: 192.168.172.201 --> 192.168.172.1 PC NIC 1: ...

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Thread: TFTP download problem with IP addressing

  1. TFTP download problem with IP addressing

    Trying to TFTP from 2 NICs of a PC (windows 2000) to 2 NICs on an
    embedded device over class C private network. But only one NIC seems
    to work properly.

    PC NIC 1: 192.168.172.201 --> 192.168.172.1
    PC NIC 1: 192.168.172.202 --> 192.168.172.2

    Someone suggested I should use different subnet for each PC NIC. This
    worked.

    PC NIC 1: 192.168.172.201 --> 192.168.172.1
    PC NIC 1: 192.168.174.202 --> 192.168.174.2

    But is this the only solution?

    I'd like to keep all IP addresses in the same subnet.


  2. Re: TFTP download problem with IP addressing


    Some corrections and clarifications below:


    > Trying to TFTP from 2 NICs of a PC (windows 2000) to 2 NICs on an
    > embedded device over class C private network. But only one NIC seems
    > to work properly.
    >
    > PC NIC 1: 192.168.172.201 --> 192.168.172.1 ( embedded device NIC 1)
    > PC NIC 2: 192.168.172.202 --> 192.168.172.2 ( embedded device NIC 2)
    >
    > Someone suggested I should use different subnet for each PC NIC. This
    > worked.
    >
    > PC NIC 1: 192.168.172.201 --> 192.168.172.1 ( embedded device NIC 1)
    > PC NIC 2: 192.168.174.202 --> 192.168.174.2 ( embedded device NIC 2)
    >
    > But is this the only solution?
    >
    > I'd like to keep all IP addresses in the same subnet.




  3. Re: TFTP download problem with IP addressing

    In article <1182182192.844716.109130@c77g2000hse.googlegroups. com>,
    CLiJC wrote:

    > Trying to TFTP from 2 NICs of a PC (windows 2000) to 2 NICs on an
    > embedded device over class C private network. But only one NIC seems
    > to work properly.
    >
    > PC NIC 1: 192.168.172.201 --> 192.168.172.1
    > PC NIC 1: 192.168.172.202 --> 192.168.172.2
    >
    > Someone suggested I should use different subnet for each PC NIC. This
    > worked.
    >
    > PC NIC 1: 192.168.172.201 --> 192.168.172.1
    > PC NIC 1: 192.168.174.202 --> 192.168.174.2
    >
    > But is this the only solution?
    >
    > I'd like to keep all IP addresses in the same subnet.


    Is this problem really specific to TFTP? Do pings between these
    addresses work properly?

    --
    Barry Margolin, barmar@alum.mit.edu
    Arlington, MA
    *** PLEASE post questions in newsgroups, not directly to me ***
    *** PLEASE don't copy me on replies, I'll read them in the group ***

  4. Re: TFTP download problem with IP addressing

    On 18 Jun 2007, CLiJC wrote:

    > Trying to TFTP from 2 NICs of a PC (windows 2000) to 2 NICs on an
    > embedded device over class C private network. But only one NIC
    > seems to work properly.
    >
    > PC NIC 1: 192.168.172.201 --> 192.168.172.1
    > PC NIC 2: 192.168.172.202 --> 192.168.172.2
    >
    > Someone suggested I should use different subnet for each PC NIC.
    > This worked.
    >
    > PC NIC 1: 192.168.172.201 --> 192.168.172.1
    > PC NIC 2: 192.168.174.202 --> 192.168.174.2
    >
    > But is this the only solution?
    >
    > I'd like to keep all IP addresses in the same subnet.


    Sounds like the embedded devices are really on different subnets.
    Is there a router between .202 and .2?

    Dave

    -- D.a.v.i.d T.i.k.t.i.n t.i.k.t.i.n [at] a.d.v.a.n.c.e.d.r.e.l.a.y
    [dot] c.o.m

  5. Re: TFTP download problem with IP addressing

    On Jun 19, 11:43 am, David Tiktin
    wrote:
    > On 18 Jun 2007, CLiJC wrote:
    >
    >
    >
    >
    >
    > > Trying to TFTP from 2 NICs of a PC (windows 2000) to 2 NICs on an
    > > embedded device over class C private network. But only one NIC
    > > seems to work properly.

    >
    > > PC NIC 1: 192.168.172.201 --> 192.168.172.1
    > > PC NIC 2: 192.168.172.202 --> 192.168.172.2

    >
    > > Someone suggested I should use different subnet for each PC NIC.
    > > This worked.

    >
    > > PC NIC 1: 192.168.172.201 --> 192.168.172.1
    > > PC NIC 2: 192.168.174.202 --> 192.168.174.2

    >
    > > But is this the only solution?

    >
    > > I'd like to keep all IP addresses in the same subnet.

    >
    > Sounds like the embedded devices are really on different subnets.
    > Is there a router between .202 and .2?
    >
    > Dave
    >
    > -- D.a.v.i.d T.i.k.t.i.n t.i.k.t.i.n [at] a.d.v.a.n.c.e.d.r.e.l.a.y
    > [dot] c.o.m- Hide quoted text -
    >
    > - Show quoted text -


    No, no router. Just direct connection.


  6. Re: TFTP download problem with IP addressing

    On Jun 18, 8:24 pm, Barry Margolin wrote:
    > In article <1182182192.844716.109...@c77g2000hse.googlegroups. com>,
    >
    >
    >
    >
    >
    > CLiJC wrote:
    > > Trying to TFTP from 2 NICs of a PC (windows 2000) to 2 NICs on an
    > > embedded device over class C private network. But only one NIC seems
    > > to work properly.

    >
    > > PC NIC 1: 192.168.172.201 --> 192.168.172.1
    > > PC NIC 1: 192.168.172.202 --> 192.168.172.2

    >
    > > Someone suggested I should use different subnet for each PC NIC. This
    > > worked.

    >
    > > PC NIC 1: 192.168.172.201 --> 192.168.172.1
    > > PC NIC 1: 192.168.174.202 --> 192.168.174.2

    >
    > > But is this the only solution?

    >
    > > I'd like to keep all IP addresses in the same subnet.

    >
    > Is this problem really specific to TFTP? Do pings between these
    > addresses work properly?
    >
    > --
    > Barry Margolin, bar...@alum.mit.edu
    > Arlington, MA
    > *** PLEASE post questions in newsgroups, not directly to me ***
    > *** PLEASE don't copy me on replies, I'll read them in the group ***- Hide quoted text -
    >
    > - Show quoted text -


    Pings do work properly.


  7. Re: TFTP download problem with IP addressing

    CLiJC writes:

    > Trying to TFTP from 2 NICs of a PC (windows 2000) to 2 NICs on an
    > embedded device over class C private network. But only one NIC seems
    > to work properly.
    >
    > PC NIC 1: 192.168.172.201 --> 192.168.172.1 ( embedded device NIC 1)
    > PC NIC 2: 192.168.172.202 --> 192.168.172.2 ( embedded device NIC 2)


    When you say "only one NIC seems to work properly", do you mean only
    one NIC is *used*? The two NICs are on the same network: that tells
    the system's networking code it's free to choose which one to send
    packets over. I'm guessing your problem is that it's simply sending
    all packets over the same NIC.

    Anyway, a clearer statement of the distinction between working
    properly and not working properly might help. Normally the difference
    between ping and TFTP would have nothing to do with the NIC, so
    presumably something else is happening here.

    -don provan

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