Vmm_core.NameSourcemac t bridge outputs deterministically a mac address for t on bridge. The resulting mac address is computed as follows: as prefix, the (no longer active) 00:80:41 (VEB Kombinat Robotron) is used, the remaining three bytes are the first three bytes of the MD5 digest of bridge ^ "." ^ to_string t.
i.e., mac ["foo";"bar"] "default" = 00:80:41:1b:11:78