'Create pair of interfaces
intfname1: name for interface 1
intfname2: name for interface 2
addr1: MAC address for interface 1 (optional)
addr2: MAC address for interface 2 (optional)
node1: home node for interface 1 (optional)
node2: home node for interface 2 (optional)
(override this method [and possibly delete()]
to change link type)'

@classmethod
def makeIntfPair(cls, intfname1, intfname2, addr1=None, addr2=None, node1=None, node2=None, deleteIntfs=True):

    assert cls
    return makeIntfPair(intfname1, intfname2, addr1, addr2, node1, node2, deleteIntfs=deleteIntfs)
