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Conference 7.286::fddi

Title:FDDI - The Next Generation
Moderator:NETCAD::STEFANI
Created:Thu Apr 27 1989
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2259
Total number of notes:8590

1459.0. "FDDI on two nodes won't work" by NWD002::GOODELL_MA (Marianne Goodell 801-565-3174) Thu Sep 29 1994 13:40

I have a situation at a customer site where we are having problems bringing
up our FDDI network.  Problem definition:

* The customer has ethernet cards and FDDI cards in each system.

* This is a three-node cluster:  7620 (MRISF1), 7620 (MRISF2 area router),
  7630 (MRISF3).

* The customer is currently using their ethernet cards.  We are not having
  any network problems while using ethernet.

* To use the FDDI, the customer performs the following steps on one of the
  three nodes:

     -- Shutdown PATHWORKS
     -- define circ and line states off for the ethernet controller
     -- define circ and line states ON for the FDDI controller
     -- set the exec state off
     -- through SYSMAN run startnet for that one node
     -- start PATHWORKS
     -- FDDI on this first node seems to work fine

* The customer then repeats the same steps on the second node.  Within 
  minutes, communication on this second node grinds to a halt.  LAT com-
  munications get slower and slower.  The existing node cannot see the
  new node.  PATHWORKS, of course, does not start.

Does anybody out there have any ideas as to why this is happening?  My
customer is anxious to have this problem resolved.

Marianne
    
T.RTitleUserPersonal
Name
DateLines
1459.1NPSS::MDLYONSMichael D. Lyons - Young enough and dumb enoughThu Sep 29 1994 14:575
        It sounds very much like you have not completely shut down the all
    the protocols using that MAC address, and you have duplicate MAC
    addresses on both interfaces.  Look at the interfaces and check the MAC
    address.  If it's the same, then shut down the network on the ethernet
    interface and see which protocols are still active on that interface.
1459.2NPSS::MDLYONSMichael D. Lyons - Young enough and dumb enoughThu Sep 29 1994 15:001
    P.S. Did you shut down LAT, for example?
1459.3LAT & Decnet were stopped...NWD002::GOODELL_MAMarianne Goodell 801-565-3174Thu Sep 29 1994 16:2210
    Yes.  I got more of the story...  Another Digital consultant came
    on-site last week, rebooted the systems and had commented out LAT
    and DECNET in the system startup file.  He then turned on the FDDI
    controller and started them both up manually.
    
    Any more ideas?  Also, excuse my ignorance, but how do we check the
    MAC address to see if it's duplicate on the interfaces?
    
    Thanks,
    Marianne
1459.4NPSS::MDLYONSMichael D. Lyons - Young enough and dumb enoughThu Sep 29 1994 19:4763
        ...assuming VMS from your previous comments:
    
    1) run SDA ($ Ana/sys
    
    2) Show lan/dev=(device)
    
    ...you will eventually get to a screen something like:
    
LAN Data Structures
-------------------
              -- XQA Device Information 29-SEP-1994 18:38:44 --

LSB address                 80509820    Active unit count                  4
LAN version        00000006 05052025    Driver version     0A000001 05050006
LAN code address            80503999    Driver code address         80500C18
Device name                 XQ_DELQA    Device type                       33
Device version     00000000 00000000    DLL type                      CSMACD

Data chaining                     ON    All multicast state              OFF
Controller mode               NORMAL    Promiscuous mode                 OFF
CRC generation mode               ON    Hardware mode                   0000
Physical address   AA-00-04-00-15-FB    Hardware address   08-00-2B-11-BC-CB

Flags:  0000                            Characteristics: 0000
Status: 0013 Inited,Run,Timer

DAT stage                   00000000    DAT xmt status     0000001A 001A0001
DAT number started                 1    DAT xmt complete     12-JUL 13:47:40
DAT number failed                  0    DAT rcv found                   None


    
    
    ...If the Physical Address field is one of the AA-00-04-xx-xx-xx
    entries, and matches for both interfaces, then that is your problem.  
    
    ...continuing along:
    
    
LAN Data Structures
-------------------
        -- XQA Multicast Address Information 29-SEP-1994 18:40:42 --

AB-00-00-04-00-00
FF-FF-FF-FF-FF-FF
09-00-2B-00-00-0F
09-00-2B-02-01-04
09-00-2B-02-01-07

                 -- XQA Unit Summary 29-SEP-1994 18:40:47 --

UCB     UCB Addr  Fmt   Value           Client     State
---     --------  ---   -----           ------  -----------
XQA0    805091E0
XQA2    805329C0  Eth   60-03           DECNET  0017 Strtn,Len,Uniq,Strtd
XQA3    80550BF0  Eth   08-00           TCPIP   0015 Strtn,Uniq,Strtd
XQA4    80550EB0  Eth   08-06           ARP     0015 Strtn,Uniq,Strtd
XQA5    80563F00  Eth   60-04           LAT     0015 Strtn,Uniq,Strtd
                                         ^
                                         |
...look here ---------------------------/
    
    to see which protocol is still operating...
1459.5May have to purge and clear Ethernet line and circuitSSDEVO::PARRISRAID-5 vs. RAID-1: n+1 << 2n, in $$$Thu Sep 29 1994 20:2311
>     -- define circ and line states off for the ethernet controller
>     -- define circ and line states ON for the FDDI controller

Should probably be:
     -- purge and clear circ and line info for the ethernet controller
     -- define and set circ and line info for the FDDI controller

I've seen reports that DECnet will change the address of a LAN controller from
the 08-00-2B-* form to the AA-00-04-* form when it starts up, even if the line
and circuit state are off, and that you need to purge and clear the info in
DECnet before it will leave it alone.
1459.6Bad controller :(NWD002::GOODELL_MAMarianne Goodell 801-565-3174Wed Nov 09 1994 12:237
    It finally ended up being *another* bad FDDI controller in the VAX.  We
    were doing most of the things recommended in this note at one time or
    another with no success.  Finally, we tried a new controller and we're
    running on our FDDI now.
    
    Thanks for all of your help.
    Marianne