festival ICT 2013: Designing an Hybrid Data Center Infrastructure
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Transcript of festival ICT 2013: Designing an Hybrid Data Center Infrastructure
![Page 1: festival ICT 2013: Designing an Hybrid Data Center Infrastructure](https://reader034.fdocuments.us/reader034/viewer/2022051816/546b8a95b4af9f6b2c8b4cde/html5/thumbnails/1.jpg)
A "What-if" analysisAndrea Dainese - Data Center Engineer
Designing an Hybrid Data Center Infrastructure
![Page 2: festival ICT 2013: Designing an Hybrid Data Center Infrastructure](https://reader034.fdocuments.us/reader034/viewer/2022051816/546b8a95b4af9f6b2c8b4cde/html5/thumbnails/2.jpg)
Data Center topology (8 years ago)Devices● Cisco Catalyst 6500 (core)● Cisco Catalyst 3560 (access)● Physical servers● FC Storage
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Data Center topology (8 years ago)What-if● a core switch power down? ←● an access switch power down?● a fiber became unidirectional?
Problems● L2 Loops● NHRP ←● black hole caused by STP convergence ←
Solutions● HSRP/GLBP ←● UDLD● RPVST ←● Storm Control● VSS + PortChannel ←
Conclusions● lossy network ←
![Page 4: festival ICT 2013: Designing an Hybrid Data Center Infrastructure](https://reader034.fdocuments.us/reader034/viewer/2022051816/546b8a95b4af9f6b2c8b4cde/html5/thumbnails/4.jpg)
Data Center topology (8 years ago)What-if● a core switch power down?● an access switch power down?● a fiber became unidirectional? ←
Problems● L2 Loops ←● NHRP● black hole caused by STP convergence
Solutions● HSRP/GLBP● UDLD ←● RPVST● Storm Control ←● VSS + PortChannel ←
Conclusions● lossy network ←
![Page 5: festival ICT 2013: Designing an Hybrid Data Center Infrastructure](https://reader034.fdocuments.us/reader034/viewer/2022051816/546b8a95b4af9f6b2c8b4cde/html5/thumbnails/5.jpg)
Data Center topology (8 years ago)What-if● a core switch power down?● an access switch power down?● a fiber became unidirectional? ←
Problems● L2 Loops ←● NHRP● black hole caused by STP convergence
Solutions● HSRP/GLBP● UDLD ←● RPVST● Storm Control ←● VSS + PortChannel ←
Conclusions● lossy network ←
![Page 6: festival ICT 2013: Designing an Hybrid Data Center Infrastructure](https://reader034.fdocuments.us/reader034/viewer/2022051816/546b8a95b4af9f6b2c8b4cde/html5/thumbnails/6.jpg)
Data Center topology (8 years ago)What-if● a core switch power down?● an access switch power down?● a fiber became unidirectional? ←
Problems● L2 Loops ←● NHRP● black hole caused by STP convergence
Solutions● HSRP/GLBP● UDLD ←● RPVST● Storm Control ←● VSS + PortChannel ←
Conclusions● lossy network ←
![Page 7: festival ICT 2013: Designing an Hybrid Data Center Infrastructure](https://reader034.fdocuments.us/reader034/viewer/2022051816/546b8a95b4af9f6b2c8b4cde/html5/thumbnails/7.jpg)
Data Center topology (4 years ago)Evolutions● needing a cheaper/easier storage network● needing a faster Ethernet network● 50% physical - 50% virtual servers
Devices● Cisco Nexus 5000 (10 GbE core)● Cisco Nexus 2000 (10 GbE access)● Virtual servers● NetApp storage (iSCSI/NFS)
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Data Center topology (4 years ago)What-if● a SCSI transmission is lost/delayed?● a cluster heartbeat is lost/delayed?
Problems● SCSI over a lossy network● Cluster heartbeat over a lossy network
Solutions● VMware Tools● Timeouts
Conclusions● SCSI doesn't like lossy networks
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Data Center topology (today)Evolutions● needing an unified cabling● 10% physical - 90% virtual servers
Devices● Blade Servers● Virtual Appliance● Unified Cabling (2 fibers bring everything)
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Data Center topology (today)What-if● a Cisco Nexus 5000 reboots?● a BPDU is transmitted by a VM? ←
Problems● Failover does not work anymore● BPDUs shut down all VMware servers ←
Solutions● Knows your devices ←
Conclusions● Hybrid devices behave unexpectedly ←
Notes● Nexus 1000v or vSphere 5.1 can filter BPDUs● Reject “Forged Transmit” is not a solution
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Data Center topology (today)What-if● a Cisco Nexus 5000 reboots?● a BPDU is transmitted by a VM? ←
Problems● Failover does not work anymore● BPDUs shut down all VMware servers ←
Solutions● Knows your devices ←
Conclusions● Hybrid devices behave unexpectedly ←
Notes● Nexus 1000v or vSphere 5.1 can filter BPDUs● Reject “Forged Transmit” is not a solution
![Page 12: festival ICT 2013: Designing an Hybrid Data Center Infrastructure](https://reader034.fdocuments.us/reader034/viewer/2022051816/546b8a95b4af9f6b2c8b4cde/html5/thumbnails/12.jpg)
Data Center topology (today)What-if● a Cisco Nexus 5000 reboots?● a BPDU is transmitted by a VM? ←
Problems● Failover does not work anymore● BPDUs shut down all VMware servers ←
Solutions● Knows your devices ←
Conclusions● Hybrid devices behave unexpectedly ←
Notes● Nexus 1000v or vSphere 5.1 can filter BPDUs● Reject “Forged Transmit” is not a solution
![Page 13: festival ICT 2013: Designing an Hybrid Data Center Infrastructure](https://reader034.fdocuments.us/reader034/viewer/2022051816/546b8a95b4af9f6b2c8b4cde/html5/thumbnails/13.jpg)
Data Center topology (today)What-if● a Cisco Nexus 5000 reboots?● a BPDU is transmitted by a VM? ←
Problems● Failover does not work anymore● BPDUs shut down all VMware servers ←
Solutions● Knows your devices ←
Conclusions● Hybrid devices behave unexpectedly ←
Notes● Nexus 1000v or vSphere 5.1 can filter BPDUs● Reject “Forged Transmit” is not a solution
![Page 14: festival ICT 2013: Designing an Hybrid Data Center Infrastructure](https://reader034.fdocuments.us/reader034/viewer/2022051816/546b8a95b4af9f6b2c8b4cde/html5/thumbnails/14.jpg)
Conclusions
I. Ethernet is a lossy networkBe sure your software can tolerate connection reset, packet loss/delay.
II. Software/Hardware integration can behave unexpectedlyBe aware of what your are including in your data-center and how to best configure it.
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Thanks
[email protected]://www.routereflector.com/http://www.linkedin.com/in/adainese@adaineseAndrea Dainese