RE: why would this happen/

  • From: "Byron Kennedy \(YAHOO\)" <snail945@xxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Tue, 26 Jul 2005 23:58:30 -0700

the windows tcp\ip stack doesn't support this setup. choose one nic or bind them using teaming architectures, but don't use multiple gateway bindings at layer 3.

byron
----- Original Message ----- From: "Kern, Tom" <tkern@xxxxxxxxxxx>
To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
Sent: Tuesday, July 26, 2005 11:05 AM
Subject: [exchangelist] RE: why would this happen/



http://www.MSExchange.org/

its 2 nics pointing to the same gateway.
i see first hand that its bad for exchange.
now, i just want to know why?
thanks

-----Original Message-----
From: Carl Houseman [mailto:c.houseman@xxxxxxxxx]
Sent: Tuesday, July 26, 2005 2:02 PM
To: [ExchangeList]
Subject: [exchangelist] RE: why would this happen/


http://www.MSExchange.org/

Patient: Doctor, doctor, it hurts when I do this!

-----Original Message-----
From: Michael B. Smith [mailto:michael@xxxxxxxxxx]
Sent: Tuesday, July 26, 2005 1:55 PM
To: [ExchangeList]
Subject: [exchangelist] RE: why would this happen/


Doctor: Don't do that.

Multiple default gateways can lead to many various and sundry problems.

-----Original Message-----
From: Kern, Tom [mailto:tkern@xxxxxxxxxxx]
Sent: Tuesday, July 26, 2005 1:44 PM
To: [ExchangeList]
Subject: [exchangelist] RE: why would this happen/

http://www.MSExchange.org/

I have an smtp connector.
the NIC's are on the same network with the same gateway

-----Original Message-----
From: Michael B. Smith [mailto:michael@xxxxxxxxxx]
Sent: Tuesday, July 26, 2005 12:19 PM
To: [ExchangeList]
Subject: [exchangelist] RE: why would this happen/


http://www.MSExchange.org/

Do you have an SMTP connector defining where outgoing email should flow?

Were the NICs on the same network, or different networks? Who had the
default gateway and who didn't? (If both did, then stop diagnosis right
there...)

All of my Exchange servers have at least two NICs (a public facing NIC
and a backup-network NIC). No problems whatsoever.

-----Original Message-----
From: Kern, Tom [mailto:tkern@xxxxxxxxxxx]
Sent: Tuesday, July 26, 2005 12:10 PM
To: [ExchangeList]
Subject: [exchangelist] why would this happen/

http://www.MSExchange.org/

I set up an exchange 2k3 server. it had 2 nics. one had a static addy,
the other was dhcp(it got all the dns info from dhcp as well). the dhcp
lease was set for 3 days

In this setup, mail was stuck in the queues for hours. sometimes days,
but eventually delivered.
the moment i disabled the dhcp nic, mail started flowing normally.

any idea why 2 nics(or dhcp) would cause this?
i never saw any MS kb's about mlti homed exchange being a bad idea OR
dhcp.
thanks

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