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Managing a Highly Available VoIP System
Andreas Granig
<agranig@upcbroadband.com>
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Agenda
- Sources of Failures
- Countermeasures
- Design Proposal
Managing a Highly Available VoIP System Andreas Granig - - PowerPoint PPT Presentation
Managing a Highly Available VoIP System Andreas Granig - - PowerPoint PPT Presentation
Managing a Highly Available VoIP System Andreas Granig <agranig@upcbroadband.com> 1 Agenda Sources of Failures Countermeasures Design Proposal 2 Sources of Failures Major Cause of Downtime 66% for PSTN 75% for
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Sources of Failures
- Major Cause of Downtime
- 66% for PSTN
- 75% for Internet Services
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Sources of Failures
- Major Cause of Downtime
- 66% for PSTN
- 75% for Internet Services
Human Error
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Countermeasures
- Focus on Simplicity
- Workflow
- Separation
- detached subsystems
- discrete environments
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Design Proposal
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“Traditional” Design
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“Traditional” Design
- Scalability?
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“Traditional” Design
- Scalability?
- NAT?
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OpenSER as Load-Balancer
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OpenSER as Load-Balancer
- One visible IP
per LB-Pair
- Defined paths
- Scalable
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Path-Header in a Nutshell
REGISTER sip:proxy1.voip.inode.at SIP/2.0 ... To: Alice <sip:alice@proxy1.voip.inode.at> From: Alice <sip:alice@proxy1.voip.inode.at>;tag=4fed24366e56031 Contact: Alice <sip:alice@172.31.23.177> ... Path: <sip:lb@192.168.1.5;lr;received=sip:172.31.23.177:5060>
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Path-Header in a Nutshell
INVITE sip:alice@172.31.23.177:5060 SIP/2.0 ... To: sip:alice@proxy1.voip.inode.at From: sip:bob@proxy1.voip.inode.at;tag=bd995782dcfef08 Contact: sip:bob@213.229.17.18:5060 ... Route: <sip:lb@192.168.1.5;lr;received=sip:172.31.23.177:5060> ...
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Summary
- Simplicity
- Modularity
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