and yes and no. These upper 3 bytes are reserved for our company, so selecting them you will never conflict with other devices in network infrastructure. i.e. the worst what can happen 2 veths will conflict.
On the other hand - you are right, 6 bytes are better :) Kirill Dietmar Maurer wrote: > Hi all, > > The code to generate mac addresses for veth (generate_mac in veth.c) > uses the > Constant SW_OUI for upper 3 bytes, and random values for lower 3 bytes. > Thus > giving 2^24 possible values. > > Isn't it better to use random numbers for all 6 bytes, like the code > in the linux kernel: > > static inline void random_ether_addr(u8 *addr) > { > get_random_bytes (addr, ETH_ALEN); > addr [0] &= 0xfe; /* clear multicast bit */ > addr [0] |= 0x02; /* set local assignment bit (IEEE802) */ > } > > That would make conflict less likely. > > - Dietmar > > > > _______________________________________________ > Users mailing list > Users@openvz.org > https://openvz.org/mailman/listinfo/users > _______________________________________________ Users mailing list Users@openvz.org https://openvz.org/mailman/listinfo/users