The packet size depends on what kind of interface you have. Traditionally it cannot exceed 1500 (actually 1536 IIRC, but 36 goes to Ethernet headers) on Ethernet, but recent Gb Ethernet interfaces are capable of transmitting “jumbo frames”. But I think this has to be explicitly enabled. Also if you are connected to a switch, the switch has to be able to handle jumbo frames too.
The problem is you have a vague claim by a network engineer without any additional detail. What you really need is somebody onsite with the knowledge to challenge your network engineer for clarification. It’s not clear that these “large packets” (how large?) are due to Linux and even if so, what effects it has.
And it would be the same for any Linux distro, not just openSUSE, since the kernel is the same.
On 10/10/2009 10:36 AM, bolik wrote:
> Hi all. I’m having issue with one of my application servers running on
> SuSe Linux.
> Network engineer was using some network sniffer and claimed that
> although MTU is set to 1500 (on SuSe ethernet interface) he found lots
> of packets of bigger size.
> I’m wondering is it possible to enable packet fragmentation on SuSe and
> if yes, then how?
Using the packet sniffer, it should be easy enough to check the source
IP of the ‘big’ packets, if they are really transmitted from the machine
What exactly is the issue you have with the application server?