host flapping

in one of our server switches, a

IOS (tm) Catalyst 4000 L3 Switch Software (cat4000-I9S-M), Version

12.2(20)EWA, RELEASE SOFTWARE (fc1)

System image file is "bootflash:cat4000-i9s-mz.122-20.EWA.bin"

cisco WS-C4507R (MPC8245) processor (revision 7) with 524288K bytes of memory.

we have this problem ;

we have implemented load balancing between two server. I understand that the mac adress 02:01:00:00:00:00 is used by MS load balancing service.

the problem is that there are 2 other servers which are also on load balancing, so twice the mac-adress on the switch.

so we get this following message every 5 or 6 seconds...

Nov 15 08:22:30 mon-ss-02 160771: Nov 15 09:22:29: %C4K_EBM-4-HOSTFLAPPING: Host 02:01:00:00:00:00 in vlan 403 is flapping between port Gi5/2 and port Gi 4/22 these server must be on the same vlan, and the MS load balancing service is by default on the MCS 7800 series (for cisco call manager).

is there a way to avoid this ?? thanks.

Reply to
nini
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The following articles may prove useful:

MS Windows Load Balancing Server: Issues with Switching and Routing

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Configuration options for WLBS hosts connected to layer 2 switches
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Regards,

Aaron

Reply to
Aaron Leonard

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