H3c-technologies H3C Intelligent Management Center User Manual Page 157

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DRBA designated routing bridge (DRB) is similar to the designated DIS in IS-IS. It helps simplify the
network topology, and appoints AVFs and appointed ports for the VLANs on each RB in the broadcast
network.
E mode/E_Port—In a SAN network, a port is called E_Port when it is operating in E mode. An E_Port
connects to the E_Port of another switch.
ECT Migration—ECT migration refers to the process that the SPB service migrates from one ECT
algorithm to another with minimum traffic loss.
ECT—The equal cost tree (ECT) is the best forwarding path generated from one device to another in an
SPBN network. ECT is generated by the shortest path first (SPF) and ECT algorithms based on the LSDB.
EDAn edge device (ED) is the switch device at the DC edge to provide Layer 2 interconnection
between DCs.
Egress RB—An egress RB is the node where a frame leaves the TRILL network.
ENDC—The EVI neighbor discovery client (ENDC) works with an ENDS to learn neighbor information
and triggers EVI link setup between neighbors.
ENDP—The EVI Neighbor Discovery Protocol (ENDP) uses the client/server model to dynamically
discover sites and edge devices, and to establish and maintain EVI links in an EVI network.
ENDS—The EVI neighbor discovery server (ENDS) uses ENDP to maintain all neighbor information
(such as IP address) in an EVI network.
EVI—Ethernet Virtual Interconnect (EVI), is a MAC-in-IP technology that provides Layer 2 connectivity
between distant Layer 2 network sites across an IP routed network. It is used for connecting
geographically dispersed sites of a virtualized large-scale data center that requires Layer 2 adjacency.
EVI maintains MAC routing information on the edge devices without changing the forwarding or
routing information within the sites or the IP network.
EVI device—An EVI device is the network device (typically a switch) that supports the EVI technology.
EVI link—An EVI link is a bidirectional virtual Ethernet channel between a pair of edge devices in an
EVI network. Data in DCs are conveyed on EVI channels. Each EVI link is uniquely identified by an
EVI-Link interface and IP address of the remote edge device.
EVI network—An EVI network is a virtual network established among edge devices in a data center to
provide Layer 2 interconnection among DCs. Through an EVI network, DCs advertises each other the
MAC addresses of all hosts and devices that are connected to edge devices, and forward frames in a
large area at Layer 2.
EVI tunnel—An EVI tunnel is a point-to-many automatic GRE tunnel that conveys EVI links for an EVI
network. One EVI tunnel can provide services only for one EVI network.
F mode/F_Port—In a SAN network, a port is called F_Port when it is operating in F mode. An F_Port
connects to an N_Port or an NP_Port of another FC switch.
Fabric—In VFM, a fabric includes FCoE switches, servers, and storage devices and transmits data for
servers and storage devices. When setting up a fabric, you must assign a domain ID to each FC switch
in the fabric and assign an FC address to each node connected to the fabric.
FCF mode—When an FCoE switch is operating in FCF mode, it can connect to the E_Port on another
FCF switch through its E_Port, or connect to the N_Port on a node or the NP_Port on an NPV switch
through its F_Port.
FCF switch—An FCF switch is an FCoE switch that is operating in FCF mode. Its VFC interfaces support
E mode (E_Port) and F mode (F_Port). VFM manages FCF switches.
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