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Matt Chilek VP at SoftLayer talks about IPv6

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  • 1.Matt Chilek
    VP, Software Development
    SoftLayer Technologies, Inc
    mchilek@softlayer.com
    AS36351
    2607:f0d0::

2. Background
SoftLayer has around 32,000 physical servers under management
These are clustered into 4,000 server pods
A group of pods is supported by a regional network core
Network cores are interconnected, and supported by a network of POPs
Datacenters are located in Dallas, Seattle, Washington, DC
Current cumulative sustained IPv4 traffic of 222Gbps
Current IPv6 traffic: 50Mbps base, peak 200Mbps
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SoftLayer Technologies, Inc
10/12/2010
3. Background
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SoftLayer Technologies, Inc
10/12/2010
4. IPv6 initiative
Began looking at IPv6 in 2008
Received ARIN allocation of /32
IPv6 initiative driven by long term planning, SoftLayer is an early adopter
Beta tested IPv6 customers in fall 2008, plus hardware upgrades
January 21, 2009 - GA launch
softlayer.com is currently a top 50 IPv6 website by both host and raw domain
http://bgp.he.net/ipv6-progress-report.cgi
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SoftLayer Technologies, Inc
10/12/2010
5. Implementation Problems
Network hardware
Provider support
Allocation scheme
Tracking application
Operations support
Customer adoption
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SoftLayer Technologies, Inc
10/12/2010
6. P1. Network hardware

  • Some equipment did not support IPv6, even in dual stack.

7. Some equipment did not support a dual stack without firmware updates. 8. Some equipment supported IPv6, but had limited implementation feature sets.6
SoftLayer Technologies, Inc
10/12/2010
9. S1. Network hardware

  • No IPv6?

Solution: Tunnels

  • Firmware or software upgrades?

Solution: Staggered maintenance

  • Limited feature sets?

Solution: Use what you have to get it done.
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SoftLayer Technologies, Inc
10/12/2010
10. P2. Provider support
Initial trouble finding provider to support our implementation scheme
Allocated a /32 from ARIN
Provider accepts /32 or larger
3 datacenters, but dont want to anycast
Ask ARIN for 2 more /32s, not going to happen*
*Before discrete network rules amendment
Ended up anycast anyways
Provider finally allowed us to broadcast /36
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SoftLayer Technologies, Inc
10/12/2010
11. S2. Provider support
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SoftLayer Technologies, Inc
10/12/2010
LOTS OF PEERING!
+ others
12. P3. Allocation scheme
Almost no published best practices
No best practices for our organizational complexity
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SoftLayer Technologies, Inc
10/12/2010
13. S3. Allocation scheme
Best practices?!!
Solution: Went with our own
/40: region
/48: router
/64: host
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SoftLayer Technologies, Inc
10/12/2010
14. P4. Tracking application
SoftLayer tracks and routes about 91,000 distinct IPv4 subnets assigned to customer hosts in the SoftLayer datacenter.
Used dense tree tree for IPv4 tracking.
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SoftLayer Technologies, Inc
10/12/2010
15. Dense tree tracking
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SoftLayer Technologies, Inc
10/12/2010
16. S4. Tracking application
Used sparse tree tree for IPv6 tracking
Fit into our existing data model with minor updates
Use existing search algorithms
Feels the same to the end user
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SoftLayer Technologies, Inc
10/12/2010
17. Sparse tree tracking
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/32
/40
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/48
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/64
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SoftLayer Technologies, Inc
10/12/2010
18. P5. Operations support
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SoftLayer Technologies, Inc
10/12/2010

  • Uh, thats a lot of numbers and letters and stuff anonymoussupporttechnician