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Re: Re: LVS over ATM [Was: NAT cluster....] (fwd)

To: Stephen Rowles <S.Rowles@xxxxxxxxxxxxxxx>
Subject: Re: Re: LVS over ATM [Was: NAT cluster....] (fwd)
Cc: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
From: Julian Anastasov <ja@xxxxxx>
Date: Sun, 17 Sep 2000 08:16:58 +0000 (GMT)
        Hello,

On Sat, 16 Sep 2000, Stephen Rowles wrote:

> The problem begins when I attempt to connect from a machine which requires
> routing across the ATM backbone. To investigate the problem I have used
> packet sniffers (ethereal - Wonderful package!) and discovered that packets
> from the real-servers never make it across the ATM backbone to the client
> machine which requested the connection (I can see them leave the real-server
> but they do not appear at the client).
>
> When this happens the ATM management software complains about duplicate IP
> addresses and refuses to route the packets. The company that provides the
> ATM hardware and management software have stated that it is not possible for
> the ATM to route packets which have the "wrong" MAC address for the IP.
> The ATM can only route packets for an IP which has the MAC address as
> advertised by an ARP-reply packet. Any IP packet which has a different MAC
> address will not (and according to the company CANNOT) be routed.
>
> I wish there was an easy solution to the problem but at the moment I cannot
> find one. I am glad to see someone else has had the same problems - it just
> confirms I'm not going completely mad! I hope that a solution can be found
> but whatever the solution is I am sure that it is not an ARP problem /
> solution.

        OK, now I fully understand your setup. We have to wait
somebody to test ATM with different routing software.


Regards

--
Julian Anastasov <ja@xxxxxx>



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