Enterprise Network Design Flashcards
Campus Networks
Client to server traffic. Also known as North-South traffic
Data Center Networks
Server to server traffic. Also known as East-West traffic
Equal-cost multipath routing (ECMP)
Can simultaneously use multiple equal paths between servers to increase available bandwidth.
Leaf and Spine Architecture
Provides a predictable number of hops between any 2 servers
Leaf switches connect to spine switches
Nodes have multiple connections to leaf switches
Core Layer
Center of campus. Connections should always be routed.
Access Distribution Block
Distribution/Aggregation and Access layers combined.
Distribution or Aggregation Layer
Reliable and consistent connection to the core while conserving port space on the core switches
Two-Tier Collapsed Core
Combines the core and distribution layers
Looped Topologie (Looped Triangle)
Physical loops and STP prevents bridging loops from occurring
Looped Square Topology
Consumes fewer ports on the distribution switches. Each access switch connects to only one distribution switch and one access switch
Looped Free Topology
No physical loops in the access and distribution layers
Looped Free U Topology
Lets you span a VLAN between 2 access switches
VSS
Loop free, 2 switches connected via VSL
Stateful Switchover
Allows a hot standby to take control of a failed route processor
Syncs FIB and CEF adjacencies between active and standby switches. No need for FHRP. Uses NSF to continue without interruption.
Routed Access Topology
VLAN cant span more than one access switch. Each access switch must serve as DG for its respective VLAN.
