ADSM-L

Re: RES: dual-homed clients

2003-02-27 10:49:03
Subject: Re: RES: dual-homed clients
From: "Marcel J.E. Mol" <marcel AT MESA DOT NL>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 27 Feb 2003 16:47:30 +0100
Hi Paul, G Louis, Jack

Thanks for your replies and suggestions.
The relevant part of the dsm.opt file is:

    Commmethod         tcpip
    Tcpport            1500
    Tcpserveraddress   tsm1
    Tcpclientaddress   nms5.mesa.nl
    Tcpclientport      1501
    Nodename           nms5
    Schedmode          prompted

In DNS nms5.mesa.nl only points to the 172 address. The 10 address
is completely 'hidden'.
Also all routes on the client route via the 172 network (except for
the 10 network of coarse).

The strange thing is that I tried to do a ping to the nms5 machine
from the nms5 machine (so a ping to itself), and the result was that
the machine pinged to the 10 address! So on the nms5 machine I ran
nslookup and asked it to resolve 'nms5'. Now it gives me the 172
address. I checked the hosts file on the but it only lists an entry for
localhost. It looks as if windows just thinks 'hey, nms5, thats me,
lets see what interfaces I have locally and pick the ipaddress of the
first interface',  which happens to be the 10.x address.

I will add an alias entry in dns for the nms5 and change dsm.opt
accordingly and see if that will make a difference...

On Thu, Feb 27, 2003 at 11:14:22AM -0300, Paul van Dongen wrote:
> Hi Marcel,
>
>    Do you have a TCPCLIENTADDRESS line in your DSM.OPT? It tells the
> server which address to contact in prompted scheduling mode.
>
>
> --
> Paul Gondim van Dongen
> Engenheiro de Sistemas
> MCSE
> Tivoli Certified Consultant - Storage Manager
> VANguard - Value Added Network guardians
> http://www.vanguard-it.com.br
> Fone: 55 81 3225-0353
>
>
> -----Mensagem original-----
> De: Marcel J.E. Mol [mailto:marcel AT MESA DOT NL]
> Enviada em: Thursday, February 27, 2003 10:31
> Para: ADSM-L AT VM.MARIST DOT EDU
> Assunto: dual-homed clients
>
>
> Hi list,
>
> We have a problem concerning dual-homed clients in our TSM environment:
>
>   SERVER                                     CLIENT
>  +--------------------+                     +--------------------+
>  | AIX 5.1            |172.20.1.10          | Win 2000           |
> 10.128.3.15
>  | TSM server 5.1.5.4 |---------------------| TSM client 5.1.5.9
> |------------
>  | Host: tsm1         |         172.20.1.15 | Host: nms5         |
>  +--------------------+                     +--------------------+
>
>
> When the scheduler service on nms5 is started it correctly connects to
> the tsm1 server and gets schedule info. This traffic must go via the
> 172.20 network as the 10.x net is not connected to the 172.20 net.
> However, listing the node info on the server it shows the 10.x address
> as client address:
>
> tsm: TSM1>q node nms5 f=d
>
>                      Node Name: NMS5
>                       Platform: WinNT
>                Client OS Level: 5.00
>                 Client Version: Version 5, Release 1, Level 5.9
>             Policy Domain Name: FSNT
>          Last Access Date/Time: 02/27/03   13:24:00
>         Days Since Last Access: <1
>         Password Set Date/Time: 02/26/03   14:13:41
>        Days Since Password Set: 1
>          Invalid Sign-on Count: 0
>                        Locked?: No
>                        Contact:
>                    Compression: Client
>        Archive Delete Allowed?: Yes
>         Backup Delete Allowed?: No
>         Registration Date/Time: 02/26/03   14:13:41
>      Registering Administrator:
> Last Communication Method Used:
>    Bytes Received Last Session: 0
>        Bytes Sent Last Session: 0
>       Duration of Last Session: 0.00
>    Pct. Idle Wait Last Session: 0.00
>   Pct. Comm. Wait Last Session: 0.00
>   Pct. Media Wait Last Session: 0.00
>                      Optionset: WIN_SERVER
>                            URL: http://nms5:1581
>                      Node Type: Client
>     Password Expiration Period:
>              Keep Mount Point?: No
>   Maximum Mount Points Allowed: 2
>         Auto Filespace Rename : No
>              Validate Protocol: No
>                    TCP/IP Name: NMS5
>                 TCP/IP Address: 10.128.3.15
>             Globally Unique ID:
> 1d.69.3d.a1.2c.6e.11.d7.8e.d1.00.02.55.67.75.b4
>
>
> Now when the tsm1 server wants to contact the nms5 client to start the
> backup it cannot reach it:
>
> 02/26/03   19:02:19      ANR8213W Session open with 10.128.3.15 timed
> out.
> 02/26/03   19:02:19      ANR2716E Schedule prompter was not able to
> contact
>                          client NMS5 using type 1 (10.128.3.15 1501).
>
> When we disable the clients network interface on the 10.x network
> everything works fine.
>
> Also when directly initiating a backup from the client itself works
> fine.
>
> The dns entry for the NMS5 machine only reports the 172.20.1.15 address.
>
> So what goes wrong here? The client initially connects to the server
> using its 172.x interface and address but the server registers it with
> the 10.x address. Why does tsm starts with a clients IP-address anyways,
> while it knows the clients TCPNAME and hence should use that as a base
> connection location?
>
> Anybody else seen this behaviour and/or knows how to resolve this?
>
> I have seen this behaviour on more dual-homed machines (AIX, Netware and
> Windows) but in most cases the 'other' network is reachable via some
> router so tsm can connect to those clients. Fortunately the real backup
> data still goes via the 172.20 network (which is a 100Mb net as opposed
> to a 16 Mb token ring for the other networks).
>
> Any hints/tips?
>
> -Marcel
> --
>      ======--------         Marcel J.E. Mol                MESA
> Consulting B.V.
>     =======---------        ph. +31-(0)6-54724868          P.O. Box 112
>     =======---------        marcel AT mesa DOT nl                 2630 AC
> Nootdorp
> __==== www.mesa.nl ---____U_n_i_x______I_n_t_e_r_n_e_t____ The
> Netherlands ____
>  They couldn't think of a number,           Linux user 1148  --
> counter.li.org
>     so they gave me a name!  -- Rupert Hine  --  www.ruperthine.com

--
     ======--------         Marcel J.E. Mol                MESA Consulting B.V.
    =======---------        ph. +31-(0)6-54724868          P.O. Box 112
    =======---------        marcel AT mesa DOT nl                 2630 AC  
Nootdorp
__==== www.mesa.nl ---____U_n_i_x______I_n_t_e_r_n_e_t____ The Netherlands ____
 They couldn't think of a number,           Linux user 1148  --  counter.li.org
    so they gave me a name!  -- Rupert Hine  --  www.ruperthine.com

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