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Gambler_168259's avatar
Gambler_168259
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Nov 14, 2014

Does for redundant LTM devices need to be configured with HA with gateway and vlan fail-safe mode to avoid service disruption?

We have deployed two LTM 5000 Load Balancers to load balance SIEBEL web traffic. Both are deployed in redundant mode and connected with upstream Cisco Nexus 5000 Switches in full mesh mode. When we t...
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Gambler_168259's avatar
Gambler_168259
Icon for Nimbostratus rankNimbostratus
Nov 14, 2014

Yes Nathan,

 

We have two upstream Cisco Nexus 5000 L3 Switches and both our F5 LTM Load Balancers have connected to them in full mesh i.e. LTM-01 is connected to Nexus-01 & Nexus-02, similarly LTM-02 is connected to Nexus-01 and Nexus-02 as well + Both LTM are connected to each other on HA VLAN trunk and with heartbeat cable as well.

 

Two VLANs are configured on it External VLAN & Internal VLAN. Both VLANs have their floating IPs.

 

What we had do is that we had disable layer-3 connectivity of nexus-01 with client upstream core router and the primary path definitely went unavailable for traffic and in the meanwhile it switches to the secondary nexus-02 which is having a layer-3 link with client upstream secondary router. We then observes a drop with request time-out in the continuous ping + a service disruption as well and the active LTM-01 appears as Backup and the backup LTM-02 appears as primary without even a manual intervention or without even using any manual forceful standby option in LTM.

 

Looking for response.