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Design (WAN (Virtual Router (Isolation WAN and Edge routing from LAN,…
Design
WAN
Throughoutput requirements
Internet MIX - Mix of packet size
Protocol overhead
IPSec - 36 bytes , GRE -4 byte
VPN design consideration
TCP-MSS and IPsec
1463 bytes IPsec + NAT traversal
1400 with nat traversal
QoS
QoE (Quality of Expirience)
Virtual Router
Isolation WAN and Edge routing from LAN
Isolate Guest networks wit internet access
To isolate PoS
Multitenant buildings
Design EXamplesa
Main services
VPN termination
WAN Aggregation
Internet Gateway
Business continuity and network enhancement
Model
2.Asses the risks
3.Formulate the plan
4.Test the plan
1.Know you network
High availability principals
Highly resilent network
Link-level redundancy
it worth it when the cost of failure is is higher than cost for secondary link
Phisical device redundancy
When a HA is desired (+3 nines or < minutes per week)
Device-level redundancy
Campus Redundancy Best Practices