RFC 297 (rfc297) - Page 1 of 2


TIP Message Buffers



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NETWORK WORKING GROUP                     Dave Walden
REQUEST  COMMENTS #297                    BBN
NIC #8485                                 1/31/72
Categories: C or maybe D
Updates: none
Obsoletes: none

                          TIP Message Buffers

     We have recently heard some groaning about the size of the TIP's
message buffers.  While we realize these aren't as big as some Hosts
might desire, they aren't as small as the intensity of the groans
suggest either.

     Let's first consider messages going from a TIP to another Host.
The buffers have the following sizes:

     device numbers           buffer size (in 8 bit characters)
         1-2                       64
         3-16                      32
        17-41                      16
        42-62                      8
         63                        6

The TIP user has the option of having his messages sent 1) every
character, 2) on line feeds and/or com's, 3) every nth character, or
4) the OR of 2) and 3). Selecting to have messages sent every large
number of characters, say 100, will result in the TIP sending the
longest messages it can for a given device.  Hosts which don't like to
receive very short messages might advise users accessing them from a
TIP to set the TIP's parameters to use the maximum length buffer.

     Now let's consider messages going from another Host to a TIP.
The buffers have the following sizes:

     device numbers           buffer size (in 8 bit characters)
        1                          96
        2                          64
        3                          48
       4-17                        24
      18-35                        16
      36-63                         8


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