Technical data

DATA CENTER and CAMPUS NETWORKS DEPLOYMENT GUIDE
Deploying Brocade Networks with Microsoft Lync Server 2010 2 of 52
CONTENTS
Introduction..........................................................................................................................................................................................................................................4!
A Global Workforce..........................................................................................................................................................4!
Streamlined Communications ........................................................................................................................................4!
Solution Components ......................................................................................................................................................................................................................5!
The Network.....................................................................................................................................................................5!
Microsoft Lync Server 2010 Standard Edition ..............................................................................................................5!
Microsoft Lync Server 2010 Enterprise Edition ............................................................................................................5!
Survivable Branch Appliance..........................................................................................................................................6!
Call Admission Control (CAC).........................................................................................................................................................................................................7!
Quality of Experience........................................................................................................................................................................................................................7!
Network Performance Concerns .................................................................................................................................................................................................8!
Voice Quality on IP Networks ..........................................................................................................................................8!
Real-Time Effective Bandwidth.......................................................................................................................................8!
Delay (or Latency) ....................................................................................................................................................8!
Packet Loss ............................................................................................................................................................10!
Jitter................................................................................................................................................................................10!
Reference Architecture.................................................................................................................................................................................................................11!
Data Center....................................................................................................................................................................11!
Core Layer...............................................................................................................................................................12!
Ethernet Fabric Access Layer................................................................................................................................12!
Hardware Load Balancing .....................................................................................................................................13!
Campus ..........................................................................................................................................................................13!
Core Layer...............................................................................................................................................................14!
Aggregation Layer ..................................................................................................................................................14!
Access Layer...........................................................................................................................................................14!
Network Services Best Practices for Unified Communications .....................................................................................................................................15!
Spanning Tree................................................................................................................................................................15!
VRRP and VRRP-e ..........................................................................................................................................................16!
Quality of Service (QoS).................................................................................................................................................18!
Configuration Options for QoS ..............................................................................................................................18!
Access Control Lists: Layer 2 Codes ............................................................................................................................20!
Prioritizing Traffic ...................................................................................................................................................20!
Configuring QoS .....................................................................................................................................................21!
Scheduling..............................................................................................................................................................21!
QoS Queuing Methods...........................................................................................................................................21!
Best Practices QoS ................................................................................................................................................22!
Rate Limiting..................................................................................................................................................................22!
Link Aggregation ............................................................................................................................................................23!
Dynamic Link Aggregation (802.1ad)...................................................................................................................24!
High Availability for Load Balancing .............................................................................................................................25!
Setting Up Active-Hot Standby Redundancy ........................................................................................................26!