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rkra_77787's avatar
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

 

 

 

12 Replies

  • I do no have a 80 Mbps dump, just the iperf information.

     

    Here is a iperf from my client to another location (same Bigip, same server behind), this is "55 Mbps only", there is a 4 ms Leased Line in between.

     

    But much better then from my local site an 29 Mbps only:

     

     

    C:\iperf>iperf -c 10.172.228.2 -t 10

     

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

     

    Client connecting to 10.172.228.2, TCP port 5001

     

    TCP window size: 8.00 KByte (default)

     

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

     

    [1908] local 10.136.172.202 port 3218 connected with 10.172.228.2 port 5001

     

    [ ID] Interval Transfer Bandwidth

     

    [1908] 0.0-10.0 sec 66.0 MBytes 55.4 Mbits/sec

     

    • CR_266055's avatar
      CR_266055
      Icon for Nimbostratus rankNimbostratus
      We run into similar issue, how did you resolve the issue?