2
votes
1answer
174 views

Full MTU not utilized with jumbo frames enabled

I've been testing to see if I can get any benefit from enabling jumbo frames. I've set up two identical Dell R210 servers with Xeon quad core E3122 CPUs, 8G of RAM and Broadcom NetXtreme II BCM5716 ...
0
votes
1answer
257 views

TCP packets larger than 4 KB don't get a reply from Linux

I'm running Linux 3.2.51 in a virtual machine (192.168.33.15). I'm sending Ethernet frames to it. I'm writing custom software trying to emulate a TCP peer, the other peer is Linux running in the ...
0
votes
1answer
474 views

What is the right way to temporarily disable/enable PMTU Discovery on a Linux box?

I've a few pcaps that contain packets larger than standard ethernet MTU size of 1500B. I searched about this and found refs pointing towards Jumbo Frames. I now understand that since I'm on a GBE ...
1
vote
2answers
1k views

Cannot increase MTU on gigabit network

I have just set up my new gigabit network and when I was about to increase the MTU to use jumbo frames, I get this error: root@rayquang-desktop:~# ifconfig eth1 mtu 9000 SIOCSIFMTU: Invalid ...