Red Hat NETWORK 4.0.5 - CHANNEL MANAGEMENTT GUIDE Instrukcja Naprawy Pobierz pdf (Strona 19)

F5 SDC Troubleshooting Guide

Proprietary and Confidential Information of F5 Networks

 The Linux command netstat –anp | grep <PORT>, does not return the LISTEN

answer as it should and instead only the prompt line displays.

The following is an example of a return LISTEN answer:

tcp 0 0 :::8080 :::* LISTEN 8091/java

tcp 0 0 ::ffff:10.2.108.3:18080 :::* LISTEN 8430/java

The following is an example of when the LISTEN answer does not display:

[root@sdcvm108-01 /]#

Resolution

 Use the following Linux command to stop the LISTEN process to that IP and

port: kill -9 <PORT>.

 Configure the Port to bind it to a different address.

 Remove the VS and configure new one that binds on different available IP and

port.

4.5.3 FEP Cannot Return Answer Back to Client

Error Description

Request is routed correctly to server, and answer is returned from server to FEP-O, CPF and

then to FEP, but it is not forwarded from FEP back to client.

Causes

 Client disconnects before it receives answer.

 Client sent a CER to FEP, but does not wait for CEA before it sends its requests.

So the requests are routed to server, which returns answers, and the answers

arrive to FEP before CER was processed inside the FEP. This results in the

return answers being routed to a closed peer (client).

Symptoms

The following WARN message appears in the FEP log with the client peer as origin: “Cannot

route the answer back, request's Origin Peer {0} was disconnected. Failed to send {1}”

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Red Hat NETWORK 4.0.5 - CHANNEL MANAGEMENTT GUIDE Instrukcja Naprawy Strona 19