[FS#4116] qca9560-eth supports jumbo frames but is limited to 1516
OpenWrt Bugs
openwrt-bugs at lists.openwrt.org
Sat Oct 30 05:18:34 PDT 2021
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The following task has a new comment added:
FS#4116 - qca9560-eth supports jumbo frames but is limited to 1516
User who did this - Geoffrey McRae (gnif)
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Correction, the limit of 1516 is caused by the following code:
dev->max_mtu = max_frame_len - ag71xx_max_frame_len(0);
static inline unsigned int ag71xx_max_frame_len(unsigned int mtu)
{
return ETH_SWITCH_HEADER_LEN + ETH_HLEN + VLAN_HLEN + mtu + ETH_FCS_LEN;
}
----------
More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=4116#comment10255
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