Feature coverage: SR-MPLS (Release 1.9.1)

Device	IS-IS IPv4 P-router	IS-IS IPv4 PE-router	IS-IS IPv6 P-router	IS-IS IPv6 PE-router
csr/libvirt	✅	✅	caveat	caveat
eos/clab	✅	✅	✅	✅
frr/clab	✅	✅	✅	✅
vjunos-switch/clab	✅	✅	✅	✅
vptx/libvirt	failed	✅	failed	✅