H3C Technologies H3C Intelligent Management Center - Manual (Page 156)

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12 Acronyms and terms
AC—A physical or virtual attachment circuit (AC) connects a BEB to a user network.
Active zone set—Zones in the active zone set of a VSAN control access to N_Ports of servers or storage
devices. There is only one active zone set in a VSAN.
Appointed port—To avoid loops, TRILL requires all the traffic of a VLAN on a broadcast network to enter
and leave the TRILL network through the same port of an RB. The port is the appointed port.
AVF—To avoid loops, TRILL requires all the traffic of a VLAN on a broadcast network to enter and leave
the TRILL network through the same port of an RB. The RB is the appointed VLAN-x forwarder (AVF) of
the VLAN, and the port is the appointed port.
BCB—Backbone core bridges (BCB) are core nodes of an SPB network. They are identical to the
provider devices in an MPLS VPN network. BCBs forward MAC-in-MAC frames based on the B-MAC
and B-VLAN. They just forward the packets and do not learn customer MAC (C-MAC) addresses to
lower network deployment cost and provide better scalability for SPBN.
BEB—Backbone edge bridges (BEB) are edge nodes of the SPBM network. They are identical to
provider edges (PEs) in an MPLS VPN network. BEBs encapsulate customer frames into MAC-in-MAC
frames before forwarding them to an SPBM network. BEBs also decapsulate MAC-in-MAC frames
before sending them to a customer site.
B-VLAN—BCBs forward MAC-in-MAC frames based on the B-MAC and B-VLAN in an SPBN network.
BEBs encapsulate customer frames with MAC addresses and VLANs assigned by the service provider.
MAC addresses and VLANs assigned by the service provider are backbone MAC addresses (B-MACs)
and backbone VLANs (B-VLANs).
CEE interface—A CEE interface is an Ethernet interface on which DCBX parameters are configured.
CEE interfaces are used to connect switches and servers and enable the switches to control server
adapters for forwarding consistency.
CEE—Converged enhanced Ethernet, also known as date center Ethernet (DCE), is enhancement and
expansion of traditional Ethernet local area networks for use in data centers.
CSNP—A Complete Sequence Number PDU (CSNP) records all LSP digests of the local LSDB. On a
broadcast TRILL network, the DRB advertises CSNPs at the CSNP interval to perform network-wide LSDB
synchronization.
DC—A data center is a facility that houses data, provides services, and includes servers, network
devices, storage devices, and others. VFM manages DC networks and the network devices, servers,
storage devices in DCs.
DCBX—The Data Center Bridging Exchange Protocol (DCBX), as part of CEE/DCE protocols, is used to
negotiate and remotely configure the bridge capability of network elements. DCBX applies to an FCoE
based data center network, and operates on an access switch. DCBX enables the switch to control the
server adapter, and simplifies the configuration and guarantees configuration consistency.
Distributing zones—Distributing zones indicates that a device distributes its active zone set or zone
database to all the other devices in the same fabric. The distributing device is called a "manager
switch," and all the other devices are called "managed switches."