Description of problem: We were running 2.4.18-e.41smp kernel with the bc5700 module included. Setting the MTU to 9000 worked fine. We upgraded to 2.4.18- e54smp and tried loading the driver. The driver loads fine, but the mtu settings don't take. If you try setting using ifconfig, it essentially says that the parameter does not exist. The problem also occurs in 2.4.18-e.52smp. Version-Release number of selected component (if applicable): Both Kernel-2.4.18-e52smp and Kernel-2.4.18-e54smp. How reproducible: Each time we boot into the later kernels. Steps to Reproduce: 1. Boot system with bc5700 gigabit gard with kernel-2.4.18-e.54smp 2. Set mtu by typing "ifconfig ethX mtu 9000" Actual results: [root@n11 ~]# ifconfig eth0 mtu 9000 SIOCSIFMTU: Invalid argument Expected results: A higher MTU should be able to be set, ie jumbo frames. Additional info:
Brent, Can I ask why you are using the bcm5700 module? Have you tried using the tg3 module instead? In general, it enjoys much better community support.
Brent, Please attach the output of running "sysreport"...I suspect that you are actually using the tg3 driver, and that you are hitting a check present in that driver which is preventing you from setting the desired MTU...
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