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From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) Description of problem: Hello, I'm having a problem with a pair of Broadcom 5704 1000Base-T ethernet cards. When I try to set up a fixed value for MTU, to lower it to 1400 (to workaround a problem related with tunneling ADSL lines), the network interface stops working (i.e. doesn't send or receive anything). The driver version is 'Broadcom Gigabit Ethernet Driver bcm5700 with Broadcom NIC Extension (NICE) ver. 6.0.2 (02/14/03)' as shown in dmesg. I have tried the same with a laptop (with Red Hat Fedora on it) and it works. May it be a problem with hardware/kernel driver... Best regards, Version-Release number of selected component (if applicable): kernel 2.4.9-e.34smp, module bcm5700 6.0.2 (02/14/03) How reproducible: Always Steps to Reproduce: 'ip link set eth0 mtu 1400' or 'MTU=1400' on /etc/sysconfig/network-scripts/ifcfg-eth0 Actual Results: The NIC stops working. Expected Results: Reduce MTU to 1400 and continue working Additional info: The vendor says the 'mtu' parameter on *loadable module* only allows values from 1500 to 9000 (to enable jumbo frames). But I'm not touching this... (also tried but didn't happened anything).
this module isn't shipped and thus not supported by us; I recommend using the tg3 driver instead.