Internet routing table breaks 512,000 routes

Discussion in 'Industry News' started by Francisco, Aug 13, 2014.

  1. Francisco

    Francisco Company Lube Verified Provider

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    Looks like with all the mass IP grabs as well as subletting of space, things have finally hit the 512K mark.

    Anyone on the raw end of an upstream router that ran out of route space?

    How do most routers handle route exhaustion? Does it still operate, just with a < full table? Or does it crap out? Or does it end up doing a lot of the routing in software? I've honestly

    not worried about it too much since we always pick DC's based on their in house networks, not how

    carrier neutral they are.

    Francisco
     
    Last edited by a moderator: Aug 13, 2014
  2. SGC-Hosting

    SGC-Hosting New Member Verified Provider

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    We do IT work on Long Island (new york) near where we're based. Last week we had setup a wireless network for a company and they have their radius server in another country. Yesterday morning I get calls about it not working... They were able to reach the radius server... but the radius server wasn't able to reach the domain controllers for authentication!  Went nuts trying to figure it out.  Ended up setting up a separate network with temporary credentials so everyone can get online.
     
  3. SkylarM

    SkylarM Well-Known Member Verified Provider

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    "Don't fix it till it's broke"

    Anyone still think the IPv6 transition will happen anytime soon? Because this is just another prime example that it WON'T happen anytime soon :p
     
  4. concerto49

    concerto49 New Member Verified Provider

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    No issue here. Didn't want to take the risk so got a more expensive router with more routes in case.
     
    HalfEatenPie and Francisco like this.
  5. wlanboy

    wlanboy Content Contributer

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    For the lazy ones:

     
    MannDude likes this.
  6. Francisco

    Francisco Company Lube Verified Provider

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    Makes the most sense.

    I'm assuming people with 512K TCAM's will likely just do partial routes + default.

    Francisco
     
  7. Mun

    Mun Never Forget

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    2014-08-13_12-34-04.png

    I think it happened around 8:06 PST :p
     
  8. concerto49

    concerto49 New Member Verified Provider

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    Think we had some abuse with the Fliphost server that's been taken care of. Definitely wasn't related. Not sure about the other stuff there.
     
  9. nunim

    nunim VPS Junkie

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    Personally I think this is awesome, companies are going to have to replace some of their dated equipment which means increased IPv6 support (hopefully..)!
     
  10. concerto49

    concerto49 New Member Verified Provider

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    Most likely routes will be consolidated / filtered.
     
  11. Deleted

    Deleted Jail

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    Most ciscos will flap because memory is exhausted. Only solution is to stop accepting /24's, which is what it should have been all along.
     
    Kris and Francisco like this.
  12. Wintereise

    Wintereise New Member

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    Filter at a /22 and you'll live another few years. TCAMs can also be adjusted on a few models that are 'virtually' limited to 512k.

    But for hardware that genuinely can't address more than 512k, yeah -- bad time to be a netops guy.
     
    Francisco likes this.
  13. dcdan

    dcdan New Member Verified Provider

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    Got this yesterday:

     
    ...  few hours later:

     
    Francisco likes this.
  14. splitice

    splitice Just a little bit crazy... Verified Provider

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    nginx.com and nginx.net had routing issues yesterday to "some US subnets". Hosted by (M5 Computer Security). Probably related.
     
  15. VPSCorey

    VPSCorey New Member Verified Provider

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    FRH stayed up :)

    Most routers with these limits crapped their pants until the TCAM was adjusted and rebooted.
     
  16. Wintereise

    Wintereise New Member

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    In all honesty, the problem isn't really 'fixable' by upgrading the limit as you go.

    You can get away with filtering at /24s now and not care -- but that isn't going to be the case pretty soon, since partial allocations seem to really be on the horizon. What happens when (god forbid) we're forced to accept announces for /29s?

    Vendors would probably have done better to invent something that could grow with the network, rather than plastering bandaid after bandaid over an already bleeding wound.
     
    danielm likes this.
  17. concerto49

    concerto49 New Member Verified Provider

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    /29? How many LoAs would I have to write? Evil.
     
  18. Francisco

    Francisco Company Lube Verified Provider

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    There's a vote at ARIN about it :(

    Francisco
     
  19. splitice

    splitice Just a little bit crazy... Verified Provider

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    How would routes of size /24 be routed if routers without support where to filter them? Do they just get a default route to one upstream carrier and go from there?