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NLB Cluster IP not working on SG200 Switch

acibat0530
Level 1
Level 1

Hi,

Good day! Just need an assistance with regards to Cluster IP.

We have two Web Servers and configured as Network Load Balancing in a cluster for failover.

WEB1 IP: 192.168.1.50

WEB2 IP: 192.168.1.51

Both configured with Cluster IP: 192.168.1.100 on Multicast mode.

TEST ON LAB USING ORDINARY 10/100 UNMANAGED SWITCH

I can ping all the IP addresses on the LAN and when I http://192.168.1.110 on any PC

on the LAN works no problem.

TEST ON PRODUCTION USING CISCO SG200 50/50 PORT SWITCH

I can ping all the IP addresse on the LAN and when I http://192.168.1.110 on a different

machine i did not work, but on the server itself will work as expected.

NOTE: Both tests are on LAN only.

I wonder if this is something to do with the switch because of Cluster IP MAC address.

Do I need to configure something on the switch? can you give advise please. Many Thanks.

AC

1 Reply 1

David Carr
Level 6
Level 6

Acibat0530,

You might have to setup a lag between the switch and those two ports on that server.

Chances are spanning tree is blocking the higher port number  and not allowing response on that port.