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Friday's Random Comment - About: Arista and FIB/RIB's

Subject: Friday's Random Comment - About: Arista and FIB/RIB's
From: nick at foobar.org (Nick Hilliard)
Date: Fri, 29 Apr 2016 14:30:12 +0100
In-reply-to: <[email protected]>
References: <[email protected]> <CAMDdSzMGn4fD33-j39ZLZ1uGLx6J44QpSkJp5DzR8_=V5t3Qtg@mail.gmail.com> <[email protected]> <CAK19Y1fAzK3s=2FMnDehScj7791ZBvayD=x967EV-f4z9mH2DA@mail.gmail.com> <D33270A8.850FF%[email protected]> <CAMDdSzMSnh-sv_eNhnq4wbRK2g3uLRG7UPtRWfbA036fhiPcsw@mail.gmail.com> <[email protected]> <CAMDdSzNM3FDZ-T=dLRG4V0hqrMoNyEXBAfNNpTe1mAk+9+3GXw@mail.gmail.com> <[email protected]> <[email protected]> <[email protected]> <[email protected]>

Laszlo Hanyecz wrote:
> I'm curious about specific failure modes that can result from this, if
> anyone can share examples/experience with it.

The canonical pathological case is where the deaggregated prefixes are
affected by upstream topology changes and suddenly your optimisations
which saved you N% of forwarding lookup table capacity are wiped out to
zero and you end up with no ability to look up next-hops.

Nick

Follow-Ups:
- Friday's Random Comment - About: Arista and FIB/RIB's
  - From: rwoolleynanog at gmail.com (Ryan Woolley)
- Friday's Random Comment - About: Arista and FIB/RIB's
  - From: baldur.norddahl at gmail.com (Baldur Norddahl)

References:
- mpls switches
  - From: mike-nanog at tiedyenetworks.com (Mike)
- mpls switches
  - From: colton.conor at gmail.com (Colton Conor)
- mpls switches
  - From: mark.tinka at seacom.mu (Mark Tinka)
- mpls switches
  - From: jackson.tim at gmail.com (Tim Jackson)
- mpls switches
  - From: wesley.george at twcable.com (George, Wes)
- mpls switches
  - From: colton.conor at gmail.com (Colton Conor)
- mpls switches
  - From: mark.tinka at seacom.mu (Mark Tinka)
- mpls switches
  - From: colton.conor at gmail.com (Colton Conor)
- mpls switches
  - From: mark.tinka at seacom.mu (Mark Tinka)
- Friday's Random Comment - About: Arista and FIB/RIB's
  - From: ahebert at pubnix.net (Alain Hebert)
- Friday's Random Comment - About: Arista and FIB/RIB's
  - From: nick at foobar.org (Nick Hilliard)
- Friday's Random Comment - About: Arista and FIB/RIB's
  - From: laszlo at heliacal.net (Laszlo Hanyecz)

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