[f-nsp] "down due to reassign" - What's this mean?

[Tom Samplonius]

   The SIXL did not see the TCP ack come back from the server to open the TCP 
session, so it assumes the server is down, and re-assigns the session on-fly to 
another server.  If enough reassignments occur, the SIXL flags the server as 
down.  This is mentioned in the manual.  You can adjust the reassign threshold, 
and watch how many times a reassign occured.

   So either, your mail servers are having load issues, or there is another path 
in the network for TCP acks to return to the client so it does not pass through 
the SIXL (which would only work if you used DSR).

   Do you have health-checks enabled (server port 25)?  If you don't, reassign is 
the only way the SIXL will know the servers are down.


Tom

On Mon, 2 Oct 2006, Thomas Johnson wrote:

> I've got a ServerIron XL with a bunch of servers connected directly
> to it, and working fine.
>
>
> I've got one server that's in a separate cabinet.  It's cross-
> connected to the SI:
> 	SI -> switch -> server
>
> (at least that's what my colo provider has told me)
>
>
> I'm load balancing SMTP traffic.  The SI logs are full of repeated
> messages:
>
>
>
> 2006-10-02T22:57:31+0000 lax-si01 lax-si01, L4 server x.x.x.x lax-
> gw10 port 25 is up
> 2006-10-02T22:57:33+0000 lax-si01 lax-si01, L4 server x.x.x.x lax-
> gw10 port 25 is down due to reassign
> 2006-10-02T22:57:35+0000 lax-si01 lax-si01, L4 server x.x.x.x lax-
> gw10 port 25 is up
> 2006-10-02T22:57:38+0000 lax-si01 lax-si01, L4 server x.x.x.x lax-
> gw10 port 25 is down due to reassign
> 2006-10-02T22:57:39+0000 lax-si01 lax-si01, L4 server x.x.x.x lax-
> gw10 port 25 is up
> 2006-10-02T22:57:42+0000 lax-si01 lax-si01, L4 server x.x.x.x lax-
> gw10 port 25 is down due to reassign
> 2006-10-02T22:57:43+0000 lax-si01 lax-si01, L4 server x.x.x.x lax-
> gw10 port 25 is up
>
>
> Can somebody tell me what this means?
>
>
> Thanks-
>
> Tom
>
> _______________________________________________
> foundry-nsp mailing list
> foundry-nsp at puck.nether.net
> http://puck.nether.net/mailman/listinfo/foundry-nsp
>