Other Limitations

When you configure the vrf-table-label statement, be aware of the following other limitations:

• The time-to-live (TTL) value in the MPLS header is not copied back to the IP header of packets sent from the PE router to the CE router.
• You cannot configure a virtual loopback tunnel interface and the vrf-table-label statement on the same routing instance. Doing so causes the commit to fail.
• Do not use the vrf-table-label statement for source class usage/destination class usage (SCU/DCU) configurations. For information on SCU/DCU configuration, see the JUNOS Network Interfaces Configuration Guide.
• You can configure the vrf-table-label statement on Multilink Frame Relay (MLFR FRF.16) encapsulated PE-router-to-P-router interfaces, but only on J-series routing platforms.
• When you configure the vrf-table-label statement, MPLS packets with label-switched interface (LSI) labels that arrive on core-facing ATM or Frame Relay interfaces, or on aggregated Ethernet interfaces configured with VLANs or Ethernet interfaces configured with VLANs, are not counted at the logical interface level.
• You cannot configure the vrf-table-label statement within a VRF routing instance if the PE-router-to-P-router interface is any of the following:
  • Aggregated SONET/SDH interfaces
  • All channelized interfaces
  • All tunnel interfaces (for example, generic routing encapsulation [GRE] and IP Security [IPSec])
  • Circuit cross-connect (CCC) and translational cross-connect (TCC) encapsulated interfaces
  • Logical tunnel interfaces
  • Virtual private LAN service (VPLS) encapsulated interfaces

    Note: All CE-router-to-PE-router and PE-router-to-CE-router interfaces are supported.

• You cannot configure the vrf-table-label statement within a VRF routing instance if the PE-router-to-P-router PIC is one of the following:
  • 10-port E1 PIC
  • 8-port Fast Ethernet PIC
  • 12-port Fast Ethernet PIC
  • 48-port Fast Ethernet PIC
  • All ATM PICs, except the ATM2 IQ PIC

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