Comment 6 for bug 1430993

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Bryan Quigley (bryanquigley) wrote :

The driver/hardware for rtl8139 seems to be limited at 4096:
bryan@desktop:/mnt/store/git/linux-git/drivers/net/ethernet/realtek$ grep 4096 *
8139cp.c:#define CP_MAX_MTU 4096
8139cp.c: RxErrLong = (1 << 21), /* Rx error, packet > 4096 bytes */

I wonder if ifupdown can handle this better and report that the MTU is to high.. maybe even fallback to maximum and note it in the logs?