Changing Broadcast mask - VMS

This is a discussion on Changing Broadcast mask - VMS ; HP TCP/IP Services for OpenVMS Alpha Version V5.6 - ECO 1 on a COMPAQ Professional Workstation XP1000 running OpenVMS V8.3 Have a flaky ISP so had to change IPs Running TCPIP$CONFIG I can't find an entry for changing the Broadcast ...

+ Reply to Thread
Results 1 to 8 of 8

Thread: Changing Broadcast mask

  1. Changing Broadcast mask

    HP TCP/IP Services for OpenVMS Alpha Version V5.6 - ECO 1
    on a COMPAQ Professional Workstation XP1000 running OpenVMS V8.3

    Have a flaky ISP so had to change IPs

    Running TCPIP$CONFIG I can't find an entry for changing the Broadcast Mask
    When I run through the menu, shutdown and start and do an IFCONFIG
    it still, of course, shows the old mask, because I nowhere found a query to
    change it.

    What did I miss?

    --
    PL/I for OpenVMS
    www.kednos.com

  2. Re: Changing Broadcast mask

    Tom Linden wrote:
    > HP TCP/IP Services for OpenVMS Alpha Version V5.6 - ECO 1
    > on a COMPAQ Professional Workstation XP1000 running OpenVMS V8.3
    >
    > Have a flaky ISP so had to change IPs
    >
    > Running TCPIP$CONFIG I can't find an entry for changing the Broadcast Mask
    > When I run through the menu, shutdown and start and do an IFCONFIG
    > it still, of course, shows the old mask, because I nowhere found a query to
    > change it.
    >
    > What did I miss?
    >


    What is a "broadcast mask"? There's a broadcast address and a subnet
    mask but I don't believe that I've ever encountered a "broadcast mask"!

  3. Re: Changing Broadcast mask


    In article , "Richard B. Gilbert
    writes:

    >Tom Linden wrote:
    >> HP TCP/IP Services for OpenVMS Alpha Version V5.6 - ECO 1
    >> on a COMPAQ Professional Workstation XP1000 running OpenVMS V8.3
    >>
    >> Have a flaky ISP so had to change IPs
    >>
    >> Running TCPIP$CONFIG I can't find an entry for changing the Broadcast Mask
    >> When I run through the menu, shutdown and start and do an IFCONFIG
    >> it still, of course, shows the old mask, because I nowhere found a query to
    >> change it.
    >>
    >> What did I miss?
    >>

    >
    >What is a "broadcast mask"? There's a broadcast address and a subnet
    >mask but I don't believe that I've ever encountered a "broadcast mask"!


    What about...

    $ TCPIP SET CONFIG INTERFACE /BROADCAST_MASK=

    ....?

    Regards,
    Mike
    --
    | Systems Specialist: CBE,MSE
    Michael T. Davis (Mike) | Departmental Networking/Computing
    http://www.ecr6.ohio-state.edu/~davism/ | The Ohio State University
    | 197 Watts, (614) 292-6928

  4. Re: Changing Broadcast mask

    Michael T. Davis wrote:
    > In article , "Richard B. Gilbert
    > writes:
    >
    >> Tom Linden wrote:
    >>> HP TCP/IP Services for OpenVMS Alpha Version V5.6 - ECO 1
    >>> on a COMPAQ Professional Workstation XP1000 running OpenVMS V8.3
    >>>
    >>> Have a flaky ISP so had to change IPs
    >>>
    >>> Running TCPIP$CONFIG I can't find an entry for changing the Broadcast Mask
    >>> When I run through the menu, shutdown and start and do an IFCONFIG
    >>> it still, of course, shows the old mask, because I nowhere found a query to
    >>> change it.
    >>>
    >>> What did I miss?
    >>>

    >> What is a "broadcast mask"? There's a broadcast address and a subnet
    >> mask but I don't believe that I've ever encountered a "broadcast mask"!

    >
    > What about...
    >
    > $ TCPIP SET CONFIG INTERFACE /BROADCAST_MASK=
    >
    > ...?
    >
    > Regards,
    > Mike
    > --
    > | Systems Specialist: CBE,MSE
    > Michael T. Davis (Mike) | Departmental Networking/Computing
    > http://www.ecr6.ohio-state.edu/~davism/ | The Ohio State University
    > | 197 Watts, (614) 292-6928


    If correct, it demonstrates the existence of a "broadcast mask" but
    fails to define what a "broadcast mask" is/does.

  5. Re: Changing Broadcast mask

    Richard B. Gilbert wrote:

    >> $ TCPIP SET CONFIG INTERFACE /BROADCAST_MASK=


    > If correct, it demonstrates the existence of a "broadcast mask" but
    > fails to define what a "broadcast mask" is/does.


    SET

    CONFIGURATION

    INTERFACE

    /BROADCAST_MASK

    /BROADCAST_MASK=IP_address

    Optional.

    Sets the Internet interface to receive all broadcast messages.

    TCP/IP Services calculates the default by the following methods:

    o Using the network number

    o Setting all bits in the host number field to 1


    I believe that this refers to the broadcast address.

    > Interface: WE0
    > IP_Addr: 10.0.0.11 NETWRK: 255.255.0.0 BRDCST: 10.0.255.255
    > Ethernet_Addr: AA-00-04-00-0B-04 MTU: 1500


  6. Re: Changing Broadcast mask

    On May 2, 11:31 am, "Richard B. Gilbert"
    wrote:
    > Michael T. Davis wrote:
    > > In article , "Richard B. Gilbert
    > > writes:

    >
    > >> Tom Linden wrote:
    > >>> HP TCP/IP Services for OpenVMS Alpha Version V5.6 - ECO 1
    > >>> on a COMPAQ Professional Workstation XP1000 running OpenVMS V8.3

    >
    > >>> Have a flaky ISP so had to change IPs

    >
    > >>> Running TCPIP$CONFIG I can't find an entry for changing the Broadcast Mask
    > >>> When I run through the menu, shutdown and start and do an IFCONFIG
    > >>> it still, of course, shows the old mask, because I nowhere found a query to
    > >>> change it.

    >
    > >>> What did I miss?

    >
    > >> What is a "broadcast mask"? There's a broadcast address and a subnet
    > >> mask but I don't believe that I've ever encountered a "broadcast mask"!

    >
    > > What about...

    >
    > > $ TCPIP SET CONFIG INTERFACE /BROADCAST_MASK=

    >
    > > ...?

    >
    > > Regards,
    > > Mike
    > > --
    > > | Systems Specialist: CBE,MSE
    > > Michael T. Davis (Mike) | Departmental Networking/Computing
    > > http://www.ecr6.ohio-state.edu/~davism/| The Ohio State University
    > > | 197 Watts, (614) 292-6928

    >
    > If correct, it demonstrates the existence of a "broadcast mask" but
    > fails to define what a "broadcast mask" is/does.



    from:


    Broadcast mask
    A mask used to interpret the IP address as a broadcast address.

  7. Re: Changing Broadcast mask


    In article , "Richard B. Gilbert
    writes:

    >Michael T. Davis wrote:
    >> In article , "Richard B.

    > Gilbert
    >> writes:
    >>
    >>> Tom Linden wrote:
    >>>> HP TCP/IP Services for OpenVMS Alpha Version V5.6 - ECO 1
    >>>> on a COMPAQ Professional Workstation XP1000 running OpenVMS V8.3
    >>>>
    >>>> Have a flaky ISP so had to change IPs
    >>>>
    >>>> Running TCPIP$CONFIG I can't find an entry for changing the Broadcast Mask
    >>>> When I run through the menu, shutdown and start and do an IFCONFIG
    >>>> it still, of course, shows the old mask, because I nowhere found a query

    > to
    >>>> change it.
    >>>>
    >>>> What did I miss?
    >>>>
    >>> What is a "broadcast mask"? There's a broadcast address and a subnet
    >>> mask but I don't believe that I've ever encountered a "broadcast mask"!

    >>
    >> What about...
    >>
    >> $ TCPIP SET CONFIG INTERFACE /BROADCAST_MASK=
    >>
    >> ...?
    >>
    >> Regards,
    >> Mike
    >> --
    >> | Systems Specialist: CBE,MSE
    >> Michael T. Davis (Mike) | Departmental Networking/Computing
    >> http://www.ecr6.ohio-state.edu/~davism/ | The Ohio State University
    >> | 197 Watts, (614) 292-6928

    >
    >If correct, it demonstrates the existence of a "broadcast mask" but
    >fails to define what a "broadcast mask" is/does.


    Sorry, I was responding to the OP. As has been covered since, HP's
    TCPIP Services for OpenVMS' "broadcast mask" is (apparently) what is more
    commonly known as the "broadcast address."

    Cheers,
    Mike
    --
    | Systems Specialist: CBE,MSE
    Michael T. Davis (Mike) | Departmental Networking/Computing
    http://www.ecr6.ohio-state.edu/~davism/ | The Ohio State University
    | 197 Watts, (614) 292-6928

  8. Re: Changing Broadcast mask

    Michael T. Davis wrote:
    > In article , "Richard B. Gilbert
    > writes:
    >
    >> Michael T. Davis wrote:
    >>> In article , "Richard B.

    >> Gilbert
    >>> writes:
    >>>
    >>>> Tom Linden wrote:
    >>>>> HP TCP/IP Services for OpenVMS Alpha Version V5.6 - ECO 1
    >>>>> on a COMPAQ Professional Workstation XP1000 running OpenVMS V8.3
    >>>>>
    >>>>> Have a flaky ISP so had to change IPs
    >>>>>
    >>>>> Running TCPIP$CONFIG I can't find an entry for changing the Broadcast Mask
    >>>>> When I run through the menu, shutdown and start and do an IFCONFIG
    >>>>> it still, of course, shows the old mask, because I nowhere found a query

    >> to
    >>>>> change it.
    >>>>>
    >>>>> What did I miss?
    >>>>>
    >>>> What is a "broadcast mask"? There's a broadcast address and a subnet
    >>>> mask but I don't believe that I've ever encountered a "broadcast mask"!
    >>> What about...
    >>>
    >>> $ TCPIP SET CONFIG INTERFACE /BROADCAST_MASK=
    >>>
    >>> ...?
    >>>
    >>> Regards,
    >>> Mike
    >>> --
    >>> | Systems Specialist: CBE,MSE
    >>> Michael T. Davis (Mike) | Departmental Networking/Computing
    >>> http://www.ecr6.ohio-state.edu/~davism/ | The Ohio State University
    >>> | 197 Watts, (614) 292-6928

    >> If correct, it demonstrates the existence of a "broadcast mask" but
    >> fails to define what a "broadcast mask" is/does.

    >
    > Sorry, I was responding to the OP. As has been covered since, HP's
    > TCPIP Services for OpenVMS' "broadcast mask" is (apparently) what is more
    > commonly known as the "broadcast address."
    >
    > Cheers,
    > Mike
    > --
    > | Systems Specialist: CBE,MSE
    > Michael T. Davis (Mike) | Departmental Networking/Computing
    > http://www.ecr6.ohio-state.edu/~davism/ | The Ohio State University
    > | 197 Watts, (614) 292-6928


    ISTR some standards conflict way back between a broadcast address having a host
    address of all 1's or all 0's and this parameter lets you specify which way you
    want to go.

+ Reply to Thread