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I have a question regarding BigIP, we are connecting from POC device. We could able to download big xml response around 60k from our unit/system servers, but not from our production server. The BigIP is different in Unit/System and in Production. However our network team checked all the TCP/HTTP profile configurations are consistent between them, still we could able to read only partial response of size 19,475 bytes out of 42,950 every time.

 

 

We are using SSL and we have been told that POC device has 9k SSL packet size limit because of memory constraint on POC device, and some how it couldn’t able to re-assemble the SSL packets because the BigIP might be sending data in 16K SSL packets. It’s difficult to buy the theory, as it’s failing exactly at 19,475 bytes.

 

 

We could able to download around 19k of response with out any problems, if the response size is greater then we are having problems in reading the response, it would read only 19,475 and fails to read any more data.

 

 

I have the following questions, appreciate if you can suggest some solution .

 

 

1. With respect to this problem what specific parameters we may have tweak in order to

 

download big xml response of size 60k+?

 

 

2. What is this magic number, why it failing at 19475 (155 header + 19320 data) every

 

time?

 

 

3. Does it something to do with mismatching of SSL packet size at BigIP and POC device?

 

 

 

Appreciate your help.