H3C Technologies H3C Intelligent Management Center - Manual (Page 269)

Glossary
AC Attachment circuit. Connects a CE to a PE. It can use physical interfaces or
virtual interfaces. Usually, all user packets on an AC, including Layer 2 and
Layer 3 protocol messages, must be forwarded to the peer site without being
changed.
access topology Access topology involves global topology and VPN access topology. Global
topology displays the network structure of all VPN resources, including all PEs,
CEs, and the AS Core; while the VPN access topology displays network
structure of all VPN resources in a VPN.
AS core An Autonomous System (AS). It can contain different regions and devices. In
the global topology of an MPLS VPN network, AS Core can also represent a
network composed of a set of core devices. MPLS VPN Management does not
manage the devices in the network.
auto discovery Based on VPN resources, auto discovery enables you to discover VPNs and
VPN links existing in a network by using the VPN instance RT value of a PE
device.
BGP Border Gateway Protocol. It establishes signaling sessions through route
reflectors (RRs) and supports networking across multiple autonomous systems
(ASs).
BGP/MPLS VPN Border Gateway Protocol/Multiprotocol Label Switching VPN. Uses BGP to
advertise VPN routes and uses MPLS to forward VPN packets on service
provider backbones.
BSB Blockade State Block.
CE Customer edge device. A device directly connected with the service provider
network.
CE dual-homing A CE router is connected to two Provider Edge (PE) routers, and the binding
VRF information of their interfaces connecting to the two CEs belongs to the
same Virtual Routing and Forwarding (VRF) instance.
CLNP Connectionless network protocol. A datagram network protocol, it provides
the same underlying service to a transport layer as IP.
configuration
audit
Compare the latest configuration that MPLS VPN Management synchronized
from the device with the device configuration saved in the MPLS VPN
Management. The results are displayed in the PE device list and the network
topology.
configuration
changed
Compare the latest configuration that MPLS VPN Management synchronized
from the device with the device configuration saved in the MPLS VPN
Management. If they are not consistent, the device is considered as
configuration changed.
connectivity
audit Connectivity between CEs in the same VPN is audited and the connectivity or
unconnectivity between CEs is listed in detail. (Inter-Spoke connectivity is not
audited by default, unless otherwise specified.)
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