Hi All,
I`ve configured 2 NLB clusters in Multicast Mode.
Cluster 10.0.16.130 (Node1: 10.0.16.131 Node2: 10.0.16.132)
Cluster 10.0.19.2 (Node1: 10.0.19.3 Node2: 10.0.19.4)
I must give network access to these clusters.
One cluster is connected to Catalyst 3750 another to Catalyst 2960.
-----on 3750-----
interface Vlan128
description << NLB1 >>
ip address 10.0.16.129 255.255.255.240
end
interface GigabitEthernet1/0/17
description << NLB1 NODE1 >>
switchport access vlan 128
switchport mode access
duplex full
end
!
interface GigabitEthernet2/0/17
description << NLB1 NODE2>>
switchport access vlan 128
switchport mode access
duplex full
end
arp 10.0.16.130 MAC ARPA
mac-address-table static MAC vlan 128 interface GigabitEthernet2/0/17 GigabitEthernet1/0/17
-----on 2960-----
interface FastEthernet0/11
description << NLB2 NODE1 >>
switchport access vlan 19
switchport mode access
interface FastEthernet0/12
description << NLB2 NODE2 >>
switchport access vlan 19
switchport mode access
!
arp 10.0.19.2 MAC ARPA
mac-address-table static MAC vlan 19 interface FastEthernet0/11 FastEthernet0/12
I can ping all cluster nodes and cluster IP. But in 5 minutes or a bit less it becomes impossible to ping one node of each cluster. Cluster is operational.
After executing "clear arp" on the switch I can again ping both nodes an cluster IP.
What can cause this strange behavior?
