文档介绍：Virtual Machine – Networking 服务器虚拟化网络接入技术发展趋势 Tang Yong System Architect, IBM STG
Data working innovation – Edge Virtual Bridging
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MAC
IP
WWN
1 to 1
Port
VLAN
QoS
ACL
….
Before
After
The Challenges what server virtualization bring to us:
VM visibility, local ‘VM to VM’ and port based VM management.
plexity – too many ‘switches’, two management domains, also management responsibility issue between Server working administrator.
Police and State mobility – VMotion need ‘Nmotion’
Performance and latency – vSwitch and related management will cost CPU resource, more features or more I/O traffic means more CPU usage, VI based I/O sharing also prevent from native I/O performance, features, scalability and bring more latency.
N to 1
Two Approaches – Two Camps
IEEE
IBM, Juniper, Brocade, HP etc., all major Switch vendors except Cisco
Leverage existing standard and equipment, protect customer investment
IEEE (IEEE )
Cisco only, and some ecosystem alliance partners
Based on Cisco proprietary technology – VN-Tag.
Pure new standard, replace all current switches.
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IEEE EVB VEP and VEPA Scheme
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Reflective Relay
Hairpin
VEB is the current approch – VMM Software I/O sharing, soft switch in hypervisor, for example, VMware vDS, Cisco Nexus 1000v, IBM DVS 5000v etc.
VEPA is all local VM2VM traffic should pass to external physical switch to do forwarding decision.
VEPA advantages:
VM to VM traffic visibility to physical switch, leverage the physical switch capability to do traffic control – ACL, security features etc., Means VEB do not need plex features.
leverage physical switch management capability like statistics, S-flow, RMON etc.
Minimizes changes to current NICs, vswitches, and external switches, by software upgrade.
IEEE EVB Multi-Channel Scheme Multiple isolated channels (S-VLANs) sharing a single physical LAN
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MultiChannel advantages:
Multiple VEB and/or VEPA virtual switches to share the same work conne