CSS11501 - Rejects incoming connections on VIP service port

[dedra_live]

Hi,

I have configured CSS11501 in one-armed mode with only one server behind the VIP. After every couple of hours the connectivity to VIP Service port (80) is lost. Telnet to VIP on port 80 does not reach the server. During the same time ping to the VIP works continuously. The interface throughput does not go beyond 40Mbps and the max concurrent connections does not go beyond 200 connections. And the 'show service summary' continues to show the server alive on http. NAT is defined for the return traffic through 'group' command

The problem gets resolved by itself within 3-4 minutes or by deactivating and re-activating the VIP within CSS configurations.

CSS model : CSS11501

Version: 08.20.0.01

Any clue or hint to troubleshoot this problem will be of great assistance.

Thanks.

[Daniel Arrondo Ostiz]

Good afternoon,

Probably the best would be opening a TAC service request to get this investigated further.

Before you do, I would anyway recommend you to try a software upgrade to the latest 8.20 release. 8.20.001 was the first release in the 8.20 train, so a lot of bug fixes have been added since then. There is still the chance that your issue will go away with this upgrade

Regards

Daniel