1 provider bridging design for unm campus - cpbn
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Provider Bridging design for UNM Campus - CPBN
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Outline of Topics Introduction Obstacles Fiber? Now What? Wavelength Division Multiplexing Ethernet-based Connections QinQ 802.1Q multi-tagging now 802.1ad How UNM and ABQG used to do it. How UNM and ABQG are doing it Now Design considerations CPBN Design Open for Discussion
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Introduction Edward May
Network Engineer with the University of New Mexico and ABQG (Albuquerque Gigapop)
http://www.unm.edu http://abqg.unm.edu
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Obstacles Acquiring Fiber
In no way does this presentation presume to inform anyone on how to get more fiber, or any at all for that matter.
One of the biggest obstacles can be getting access to, or acquiring any fiber at all.
Often you just can’t get new fiber installed
Equipment cost versus Fiber cost Virtual resource versus physical resource.
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Fiber? Now What? Growing Bandwidth Needs. And
everyone will say it is a NEED. Ethernet – almost all of our
connections are Ethernet these days. 1g or 10g
Link Aggregation – use multiple fiber pairs using Ethernet and bond them together for additional bandwidth
WDM – Wave Division Multiplexing 802.1Q – Provider Bridging
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Wave Division Multiplexing Multiple carrier signals on the same pair
of fiber DWDM – Dense – narrower wavelengths CWDM – Coarse – wider wavelengths
Allows for expanding capacity without additional fiber installation. Color (light frequency) is used for the
individual signals.
Stealth.net
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Wave Division Multiplexing CWDM
Transponders can be lower cost ~4-16 waves some might have
limitations DWDM
Some systems up to 160 different signals each capable of 10gb/s
100gb/s on the way for some equipment
BTI Systems example
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Ethernet-based Connections Ethernet is the Standard
No Token Ring, FDDI, Firewire Twisted Pair or Fiber, No 10base5 or
10base2 anymore CenturyLink/Zayo/TWTC are
offering Metro Optical Ethernet or Ethernet services, in much of their service area
Low-cost interfaces, cables and connectors for copper
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QinQ 802.1Q multi-tagging The 802.1 Ethernet standard was amended to allow
for vlans within vlans. Now called 802.1ad
http://www.ieee802.org/1/pages/802.1ad.html This adds a 12-bit Vlan ID field to packets.
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How we used to do it
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How we used to do it
DWDM Point to point system, with transponders only.
Redundancy Path Router Port Transponder
Capable – OC, Ethernet, FC, Outside wavelengths(or alien)
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How we do it now
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How we do it now DWDM Point to point system, with
transponders and QinQ for gigE services.
Redundancy Path Router Port(if we wish) Transponder Ethernet
Capable – OC, Ethernet, FC, Outside wavelengths(or alien), Also Ethernet “circuits” can be protected.
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Good and Bad
Easy configuration Rate limiting (tested it works) Ethernet standards plus Provider
bridging.
Monitoring capabilities still lagging the capabilities.
Campus Connectivity Now
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Design Considerations
Monitoring service – costly to monitor a fiber pair
Private circuits Redundancy – sfp’s, fiber pairs,
fiber path, hardware Training costs/Hardware costs Reliability Maintenance and Operability –
Distance limitations/optical power loss 17
UNM Network Re-Design
Move away from older and slower large distributed routers
Faster distributed switching for on-campus communications
Capability of additional service redundancy to buildings – sfp, fiber pair, port
Upgrade from 20Gbps backbone to 40Gbps with 100Gbps for campus and Research networks18
Designs Considered
MPLS to the building More expensive hardware/routing
platform, distributed routing Distributed Routing/current model
More expensive hardware, still distributed
Provider Bridging Proven between ABQG and UNM,
More centralized routing and services capable, manage circuits
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Migration in Process Hardware deployed to Fiber Zones 40Gbps up between FZ’s 80Gbps up to new Core routers 100Gbps up to new Core from
ABQG for campus and Research Local connections made to FZ
routers Securing new Hardware, and
configuration in process, Migration of buildings begins soon21
Migration from Current
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100G for UNM
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CBPN and Research Network
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References:
1. 802.1ad QinQ: http://www.ieee802.org/1/pages/802.1ad.h
tml and http://en.wikipedia.org/wiki/802.1QinQ
2. BTI Systems: http://www.btisystems.com
3. Albuquerque Gigapop website: http://abqg.unm.edu
4. Wikipedia is your friend. QinQ, WDM, etc: http://en.wikipedia.org/wiki/IEEE_802.1ad-2005