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rkra_77787
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May 26, 2013

Connection to Server through BigIP slow, connection from Servers VLAN OK: How to troubleshoot?

Is this the right forum, I'm not sure ..?

 

Configuration:

 

================

 

- BIgIP in the DMZ

 

- Server behind the BigIP running private address space

 

Server is made public through a virtual Server' Public IP

 

Server gets it's data from a client on private net through the private IP

 

Client (private net)->

 

input BigIP DMZ Interface ->

 

output BigIP Server VLAN Interface ->

 

Input Server Interface

 

Communication Client <-> Server is running through a Forwarding Virtual Server (under Virtual Servers), which is in Performance(Layer 4) Mode. See Attachment.

 

Problem description

 

================

 

Slow communication between Client / Server

 

Fast Communication from this client if in Server' VLAN (NOT GOING THROUGH THE BIG-IP)

 

Wireshark stream Client<->Server shows no errors.

 

We measured the connectivity with iperf, here are the results

 

C:\iperf>iperf -t 60 -c 10.136.228.3

 

------------------------------------------------------------

 

Client connecting to 10.136.228.3, TCP port 5001

 

TCP window size: 8.00 KByte (default)

 

------------------------------------------------------------

 

[1908] local 10.136.172.202 port 4643 connected with 10.136.228.3 port 5001

 

[ ID] Interval Transfer Bandwidth

 

[1908] 0.0-60.0 sec 181 MBytes 25.3 Mbits/sec

 

25 Mbit/s are not bad, without BigIP there are 80 Mbit.

 

There are some more profiles in the Forwarding Servers's configuration, may be they could help?

 

Roman

 

 

 

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