Re: Strange networking issue
From: Willeat, Todd (TWilleat@MHP.SMHS.COM)
Date: 04/25/03
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Date: Thu, 24 Apr 2003 23:56:12 -0500 From: "Willeat, Todd" <TWilleat@MHP.SMHS.COM> To: aix-l@Princeton.EDU
There shouldn't be any routing since both boxes are on the same subnet...
But, if it helps, here's the traceroute info:
trying to get source for mhp-aquaman
source should be 170.29.112.254
traceroute to mhp-aquaman (170.29.112.30) from 170.29.112.254
(170.29.112.254), 30 hops max
outgoing MTU = 1500
1 * * *
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-----Original Message-----
From: John Jolet [mailto:john.jolet@FXFN.COM]
Sent: Thursday, April 24, 2003 8:16 PM
To: aix-l@Princeton.EDU
Subject: Re: Strange networking issue
really, really sounds like a routing issue...what does a traceroute from the
aix to win2k box look like?
-----Original Message-----
From: Willeat, Todd [mailto:TWilleat@MHP.SMHS.COM]
Sent: Thursday, April 24, 2003 5:22 PM
To: aix-l@Princeton.EDU
Subject: Strange networking issue
Hi all,
I have a strange network connectivity issue between a p640 box (AIX 4.3.3
ML11) and a Win2K box (SP3). Both boxes are on the same subnet (and same
switch), but are having problems pinging each other. The Win2K box has no
problem connecting to other boxes, and people can telnet to the AIX box. The
Win2K box has 6 GigE connections in an 802.3ad dynamic team. The p640 box
has a SysKonnect dual-port GigE card running in failover mode (as well as
the 2 integrated 10/100s - I have one of these on another subnet and the
Win2K box can ping that just fine...). Looking at the arp tables shows that
each box knows the other's MAC address. My network admin captured some
packets between the 2 and this is what we saw:
Pinging from Win2K to AIX - we saw the packet go from Win2K to AIX, but AIX
did not return any packets.
Pinging from AIX to Win2K - we saw the packet go from AIX to Win2K and saw
the response packet from Win2K to AIX, but AIX did not receive it (request
timed out).
It appears that AIX is dropping the packets from this Win2K box for some
reason (I have several other p640s with the same config that work fine).
However, when I rebooted the Win2K box (after it locked up...), I could then
ping between the boxes. But this only lasted for a day or so, and now it is
not working again.
Has anyone seen anything like this before?
_______________________________________
/ Todd A. Willeat \
| UNIX Administrator |
| Mercy Health Plans |
| 425 South Woods Mill Road |
_ | Chesterfield, Missouri 63017-3492 | _
/ )| (314) 214-2329 / (314) 214-8202 (fax) |( \
/ / | twilleat@mhp.mercy.net | \ \
_( (_ | http://www.mercyhealthplans.com/ | _) )_
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