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Hello all,

I'm attempting to get a PPP dial-on-demand connection (using one-way CHAP
authentication initiated by the called party) to work with an AS/400
(calling party) at V4R4 using a 2720 V.24 port and the 7852-400 IBM modem.
All goes well through the LCP negotiation phase.  Within the authentication
phase, the AS/400 receives a CHAP challenge and returns a CHAP response.  It
then repeats the CHAP response.  The called system for some reason issues a
new CHAP challenge, for which the AS/400 returns a number of CHAP responses
(as defined by the link's config).  The AS/400 then gives up and issues a
termination.  One clue may be the mysterious discard request issued by the
AS/400 in record 12.  I've also tried using PAP, but it also times out and
also has the strange discard request to an ID no where else in the trap.
I've applied all PPP related PTFs per IBM's site.  The com trap is always
the same.  Any ideas?  Below is part of the com trap:

Record       Data    Record      Record           DLC Frame  Address
Control
Number  S/R  Length  Status      Timer            Format     Field    Field
Protocol ID
------  ---  ------  ----------  ---------------  ---------  -------  ------
-  ------------
     8   S       24    00000000   12:23:02.01067    PPP         FF       UI
C021 (LCP)
        LCP  . . . . . :  Code: 01 (Configure Request)       ID: 0B
Length:    20
        Option . . . . :  Type: 01 (MRU)                     Length:   4
MRU:  2048
        Option . . . . :  Type: 02 (Async Map)               Length:   6
Async Map: 00000000
        Option . . . . :  Type: 05 (Magic Number)            Length:   6
Magic Number:
        Data . . . . . :  FF03C021010B0014 0104080002060000
00000506B800DCC4
     9   R       27    00000000   12:23:02.29147    PPP         FF       UI
C021 (LCP)
        LCP  . . . . . :  Code: 01 (Configure Request)       ID: 16
Length:    23
        Option . . . . :  Type: 01 (MRU)                     Length:   4
MRU:  1514
        Option . . . . :  Type: 02 (Async Map)               Length:   6
Async Map: 00000000
        Option . . . . :  Type: 03 (CHAP Protocol)           Length:   5
CHAP Protocol: C223
        Option Data  . :  05
        Option . . . . :  Type: 07 (Protocol Comp)           Length:   2
        Option . . . . :  Type: 08 (Addr/Cntrl Comp)         Length:   2
        Data . . . . . :  FF03C02101160017 010405EA02060000
00000305C2230507 020802
    10   R       24    00000000   12:23:02.31661    PPP         FF       UI
C021 (LCP)
        LCP  . . . . . :  Code: 02 (Configure Ack)           ID: 0B
Length:    20
        Option . . . . :  Type: 01 (MRU)                     Length:   4
MRU:  2048
        Option . . . . :  Type: 02 (Async Map)               Length:   6
Async Map: 00000000
        Option . . . . :  Type: 05 (Magic Number)            Length:   6
Magic Number:
        Data . . . . . :  FF03C021020B0014 0104080002060000
00000506B800DCC4
    11   S       27    00000000   12:23:02.82842    PPP         FF       UI
C021 (LCP)
        LCP  . . . . . :  Code: 02 (Configure Ack)           ID: 16
Length:    23
        Option . . . . :  Type: 01 (MRU)                     Length:   4
MRU:  1514
        Option . . . . :  Type: 02 (Async Map)               Length:   6
Async Map: 00000000
        Option . . . . :  Type: 03 (CHAP Protocol)           Length:   5
CHAP Protocol: C223
        Option Data  . :  05
        Option . . . . :  Type: 07 (Protocol Comp)           Length:   2
        Option . . . . :  Type: 08 (Addr/Cntrl Comp)         Length:   2
        Data . . . . . :  FF03C02102160017 010405EA02060000
00000305C2230507 020802
    12   S       10    00000000   12:23:02.88697    PPP
C021 (LCP)
        LCP  . . . . . :  Code: 0B (Discard Request)         ID: 0C
Length:     8
                          Magic Number: B800DCC4
        Data . . . . . :  C0210B0C0008B800 DCC4
    13   R       17    00000000   12:23:04.28520    PPP         FF       UI
C223 (CHAP)
        CHAP . . . . . :  Code: 01 (CHAP Challenge)          ID: 17
Length:    13
                          Value Size:   8                    CHAP Value:
3133 303137353539
        Data . . . . . :  FF03C2230117000D 0831333031373535  39
    14   S       30    00000000   12:23:04.90402    PPP
C223 (CHAP)
        CHAP . . . . . :  Code: 02 (CHAP Response)           ID: 17
Length:    28
        LCP  . . . . . :  Code: 01 (Configure Request)       ID: 16
Length:    23
        Option . . . . :  Type: 01 (MRU)                     Length:   4
MRU:  1514
        Option . . . . :  Type: 02 (Async Map)               Length:   6
Async Map: 00000000
        Option . . . . :  Type: 03 (CHAP Protocol)           Length:   5
CHAP Protocol: C223
        Option Data  . :  05
        Option . . . . :  Type: 07 (Protocol Comp)           Length:   2
        Option . . . . :  Type: 08 (Addr/Cntrl Comp)         Length:   2
        Data . . . . . :  FF03C02101160017 010405EA02060000
00000305C2230507 020802
    10   R       24    00000000   12:23:02.31661    PPP         FF       UI
C021 (LCP)
        LCP  . . . . . :  Code: 02 (Configure Ack)           ID: 0B
Length:    20
        Option . . . . :  Type: 01 (MRU)                     Length:   4
MRU:  2048
        Option . . . . :  Type: 02 (Async Map)               Length:   6
Async Map: 00000000
        Option . . . . :  Type: 05 (Magic Number)            Length:   6
Magic Number:
        Data . . . . . :  FF03C021020B0014 0104080002060000
00000506B800DCC4
    11   S       27    00000000   12:23:02.82842    PPP         FF       UI
C021 (LCP)
        LCP  . . . . . :  Code: 02 (Configure Ack)           ID: 16
Length:    23
        Option . . . . :  Type: 01 (MRU)                     Length:   4
MRU:  1514
        Option . . . . :  Type: 02 (Async Map)               Length:   6
Async Map: 00000000
        Option . . . . :  Type: 03 (CHAP Protocol)           Length:   5
CHAP Protocol: C223
        LCP  . . . . . :  Code: 01 (Configure Request)       ID: 16
Length:    23
        Option . . . . :  Type: 01 (MRU)                     Length:   4
MRU:  1514
        Option . . . . :  Type: 02 (Async Map)               Length:   6
Async Map: 00000000
        Option . . . . :  Type: 03 (CHAP Protocol)           Length:   5
CHAP Protocol: C223
        Option Data  . :  05
        Option . . . . :  Type: 07 (Protocol Comp)           Length:   2
        Option . . . . :  Type: 08 (Addr/Cntrl Comp)         Length:   2
        Data . . . . . :  FF03C02101160017 010405EA02060000
00000305C2230507 020802
    10   R       24    00000000   12:23:02.31661    PPP         FF       UI
C021 (LCP)
        LCP  . . . . . :  Code: 02 (Configure Ack)           ID: 0B
Length:    20
        Option . . . . :  Type: 01 (MRU)                     Length:   4
MRU:  2048
        Option . . . . :  Type: 02 (Async Map)               Length:   6
Async Map: 00000000
        Option . . . . :  Type: 05 (Magic Number)            Length:   6
Magic Number:
        Data . . . . . :  FF03C021020B0014 0104080002060000
00000506B800DCC4
    11   S       27    00000000   12:23:02.82842    PPP         FF       UI
C021 (LCP)
        LCP  . . . . . :  Code: 02 (Configure Ack)           ID: 16
Length:    23
        Option . . . . :  Type: 01 (MRU)                     Length:   4
MRU:  1514
        Option . . . . :  Type: 02 (Async Map)               Length:   6
Async Map: 00000000
        Option . . . . :  Type: 03 (CHAP Protocol)           Length:   5
CHAP Protocol: C223
        Option Data  . :  05
        Option . . . . :  Type: 07 (Protocol Comp)           Length:   2
        Option . . . . :  Type: 08 (Addr/Cntrl Comp)         Length:   2
        Data . . . . . :  FF03C02102160017 010405EA02060000
00000305C2230507 020802
    12   S       10    00000000   12:23:02.88697    PPP
C021 (LCP)
        LCP  . . . . . :  Code: 0B (Discard Request)         ID: 0C
Length:     8
                          Magic Number: B800DCC4
        Data . . . . . :  C0210B0C0008B800 DCC4
    13   R       17    00000000   12:23:04.28520    PPP         FF       UI
C223 (CHAP)
        CHAP . . . . . :  Code: 01 (CHAP Challenge)          ID: 17
Length:    13
                          Value Size:   8                    CHAP Value:
3133 303137353539
        Data . . . . . :  FF03C2230117000D 0831333031373535  39
    14   S       30    00000000   12:23:04.90402    PPP
C223 (CHAP)
        CHAP . . . . . :  Code: 02 (CHAP Response)           ID: 17
Length:    28
                          Value Size:  16                    CHAP Value:
C40E D0F8A70C0DA61212
                          Name: 4D41525449 4E4A
        Data . . . . . :  C2230217001C10C4 0ED0F8A70C0DA612
12C4CDD6A7E9074D 415254494E4A
    15   S       30    00000000   12:23:07.95596    PPP
C223 (CHAP)
        CHAP . . . . . :  Code: 02 (CHAP Response)           ID: 17
Length:    28
                          Value Size:  16                    CHAP Value:
C40E D0F8A70C0DA61212
                          C4CDD6A7E907
                          Name: 4D41525449 4E4A
        Data . . . . . :  C2230217001C10C4 0ED0F8A70C0DA612
12C4CDD6A7E9074D 415254494E4A
    16   R       17    00000000   12:23:09.67320    PPP         FF       UI
C223 (CHAP)
        CHAP . . . . . :  Code: 01 (CHAP Challenge)          ID: 18
Length:    13
                          Value Size:   8                    CHAP Value:
3234 653637333335
        Data . . . . . :  FF03C2230118000D 0832346536373333  35
    17   S       30    00000000   12:23:09.93691    PPP
C223 (CHAP)
        CHAP . . . . . :  Code: 02 (CHAP Response)           ID: 18
Length:    28
                          Value Size:  16                    CHAP Value:
1752 8357AA39221663BB
                          4B985D396D12
                          Name: 4D41525449 4E4A
        Data . . . . . :  C2230218001C1017 528357AA39221663
BB4B985D396D124D 415254494E4A
    18   S       30    00000000   12:23:10.98820    PPP
  C223 (CHAP)
        CHAP . . . . . :  Code: 02 (CHAP Response)           ID: 18
Length:    28
                          Value Size:  16                    CHAP Value:
1752 8357AA39221663BB
                          4B985D396D12
                          Name: 4D41525449 4E4A
        Data . . . . . :  C2230218001C1017 528357AA39221663
BB4B985D396D124D 415254494E4A

It then repeats this response a few more times and finally issues a
terminate request, which is acknowledged by the called system.





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