Chapter 1 Flashcards
Modular
supports change and growth
Resilient
Uptime High availablity
Flexible
network adaptability
Multilayer switches
hardware-based routing ASIC Application Specific integrated Circuits
Catalyst 6500 Family
- used in campus, data center, core, wan and branch
- 13 slots and 16 10-Gigabit Ethernet interfaces
Catalyst 4500 Family
- used in distribution layer
- 10 slots and several 10-Gigabit Ethernet interfaces
Catalyst 3560 and 3750 Families
used in fixed-port scenarios at the access and distribution layers
Nexus 2000, 5000, and 7000 Families
NX-OS based modular data center switches
Network Management Traffic
BPDU, CDP, SNMP, RMON, SSH (low bandwidth)
IP Telephony Traffic
Signaling traffic encapsulated voice traffic (low bandwidth)
IP Multicast Traffic
IP/TV and market data applications (High bandwidth)
Normal Data Traffic
file print email internet browsing (low to medium bandwidth)
Scavenger Class Traffic
- all traffic with protocols that exceed normal data flows
- p2p, IM, voip (medium to high bandwidth)
SONA
Service-Oriented Network Architecture
Application Layer
business and collaboration applications
Interactive Services Layer
efficient allocation of resources to applications and business processes the networked infrastructure
Networked Infrastructure Layer
where all IT resources interconnect
Building Core Layer
- High speed campus backbone
- Switch packets as fast as possible
- High availability and adaptability
Building Distribution Layer
Use switches to separate work-groups and isolate network problems
Building Access Layer
grant user access to network devices
Core layer
- Combine distribution layer switches
- adds scalable protocols and load balancing
- High speed layer 3 switching using 10 gig Ethernet
- redundant layer 3 links
Distribution Layer
- High availability, fast path recover, load balancing, QoS Security
- Route summaries and packet manipulation
- Packet filtering and policy routing
Access layer
- High availability
- Convergence PoE Power over Ethernet for Voip and wireless access points
- Security port security, DhCP snooping, Dynamic ARP inspection and IP source guard
Small Network
0 - 200 end devices
- Collapsed core
- Catalyst 3560 2960G switches for access layer
- Cisco 1900 and 2900 routers to connect to branch/WAN
Medium Network
200 -1000 end devices
- Redundant multilateral switches at distribution layer
- Catalyst 4500 and 6500 switches
Large Network
1000 or more end users
- stricter adherence to core, distribution, access layer
- Catalyst 6500 switches in core and distribution layers
- Nexus 7000 switches in data centers
- Division of labor among network engineers
Data Center Infrastructure
Aggregation layer - service module integration, default gateway redundancy, security, load balancing, content switching, network analysis Access layer - connects servers to network
PPDIOO Phases
Prepare - establish organizational requirements
Plan - identify initial network requirements
Design - based on planning outcomes
Implement - build network according to design
Operate - maintain network health
Optimize - proactive management of netowrk
Lifecycle approach
Benefits
- lowering the total cost of network ownership
- increasing network availability
- efficient access to applications and services
Lower Costs
- identify and validate technology requirements
- accelerate successful implementation
- improve the efficiency of your network and of the staff supporting it
- reduce operating expenses by improving the efficiency of operational processes and tools
