I don't think too much about my bond allocation. Across my accounts, it's a mix of VGIT (intermediate treasuries), TIPS (inflation-protected), VTEB (munis, in taxable), and BND.
With reports starting of foreign countries dumping US treasuries, I've thought I might be overweight in domestic bonds, but I understand it's not the same considerations as with equities. Should one get some exposure to international funds like BNDX? The funds I have haven't really dipped yet, and I'm not concerned with chasing yield.