W_LL
W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
if (W_ADDR + W_LL - addrwidth > llwidth)
llwidth = W_ADDR + W_LL - addrwidth;
if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;