CCDA 640-864 Summary Notes – Day 3

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Hierarchical Network Models

Advantages

  • Cost savings
  • Ease of understanding becausee of simple design and lower management costs as monitoring systems are distributed.
  • Network growth as changes are contained to a small subset  of the network and only impact that small area
  • Easy to isolate a problem in the network if the hierarchial model is used
  • Facilitates route summarization

Hierarchial Network Design for the LAN

  • Core
  • Fast switching backbone
  • QoS
  • Redundancy
  • network Diameter (router hops from edge to edge) should be consistent
  • Distribution
  • Policy-based connectivity
  • Redundancy
  • QoS
  • Security
  • Media translation
  • Route aggregation
  • Access
  • Network access
  • Port Security
  • VACL
  • POE
  • Layer 2 switching
  • High Availability

Hierarchial network design inplementation:

  • Switched design
  • Core – High speed switching

Route Summarization

  • Distribution – Layer 3 boundary + Redundancy + Policies + InterVLAn + Route Summary
  • Access – STP
  • Routed design
  • Core – Layer 3 switching

Route Summarization

  • Distribution – Layer 3 Boundary + Filtering towards access +Policing + summarization towards core
  • Access

Virtual Switching System VSS (Cisco 6500) can be used to replace STP  and need for Redundancy protocols.

Cisco Enterprise Architecture model

Used for more scalable networks

  • Enterprise Campus Area
  • Core –
  • Distribution
  • Access
  • Data Center
  • Enterprise Edge Area
  • E-commerce – servers, IPS,Firewalls
  • DMZ – Firewalls, FTP HTTP Servers SMTP
  • WAN
  • VPN – ASA, IPS, Firewalls
  • SP Edge Module
  • Internet
  • WAN
  • PSTN
  • Remote
  • Branch
  • Data Center
  • Teleworkers

Borderless Network Services

  • Mobility
  • Cisco Motion
  • Security
  • Cisco TrustSec
  • Cisco ASA
  • Cisco Virtualization  Security
  • Cisco Anyconnect
  • Cisco SAFE
  • Application Performance
  • Application Velocity
  • WAAS
  • IP Comm
  • Cisco VideoStream

High Availability Network Services

  • In Access Layer
  • ARP
  • Explicit Configuration
  • RDP
  • RIP
  • HSRP
  • VRRP
  • GLBP
  • Server Redundancy
  • HSRP, GLBP
  • NIC – dual attachment
  • Fast EtherChannel and Gigabit EtherChannel
  • Router Redundancy
  • Availability
  • Load balancing

Link Media Redundancy

  • STP
  • VSS
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