H3C Technologies H3C Intelligent Management Center - Manual (Page 263)

How does import or removal of some HoPEs affect the other HoPEs in a VPN network?
If the imported PEs are not hierarchical, they exist in the VPN as common PEs. Otherwise, the system
automatically recognizes PE roles. This rule applies to the removal of PEs, too.
Three types of PEs exist in a VPN: superstratum PEs (SPE), underlayer PEs (UPEs), and middle-level PEs
(MPE).
• If you import an SPE and a UPE, they exist as common PEs.
• If you import an SPE and an MPE, or import an MPE and a UPE, they exist as an SPE and a UPE
respectively.
• If you import an MPE when an SPE and a UPE exist, these three devices exist as SPE, MPE, and UPE,
respectively.
• If an SPE, MPE, and UPE exist in the VPN, and you remove the MPE only, the SPE and UPE become
common PEs.
• If an SPE, MPE, and UPE exist in the VPN, when you remove the SPE or UPE, the remaining devices
are SPE and UPE, respectively.
How should I discover a complete VPN network in MPLS VPN Management?
When selecting a PE to discover a VPN network, it is recommended that you remove the VPN related to
the CEs in the VPN list and select PEs to be synchronized before auto discovery.
Why does an invalid link exist in global access topology after auto discovery is completed?
After auto discovery is completed, if the original VPN link does not belong to any VPN, this link is
marked as invalid in global access topology.
The causes for the invalid link may be:
• Association between the interface and VRF on the PE is removed.
• Definition of the VRF associated with the interface on the PE was modified, and the RT value in the
new VRF does not belong to any VPN in MPLS VPN Management.
MPLS VPN Management does not manage an invalid link. Therefore, it is recommended that you remove
it.
Why can't PC be imported to MPLS VPN Management as a CE?
PEs and CEs managed by MPLS VPN Management must support SNMP. Check whether the PC supports
SNMP. If not, you can create a virtual CE to replace the PC and configure a real IP address for the virtual
CE interface.
In a VPN with the audit result being Connected, why are PE-Core links displayed as unknown
in the topology?
PE-Core links and inter-HoPE links are defined when the devices are being imported and MPLS VPN
Management does not support dynamic interface update. You can modify interfaces on PE-Core links
and inter-HoPE links.
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