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NLB Cluster IP not working on SG200 Switch

acibat0530
Beginner
Beginner

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
Frequent Contributor
Frequent Contributor

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.

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