nanog mailing list archives
Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?)
From: Mark Tinka <mark.tinka () seacom mu>
Date: Mon, 22 Jun 2020 16:47:53 +0200
On 22/Jun/20 16:30, adamv0025 () netconsultings com wrote:
Not quite, The routing information is flooded by default, but the receivers will cherry pick what they need and drop the rest. And even if the default flooding of all and dropping most is a concern -it can be addressed where only the relevant subset of all the routing info is sent to each receiver. The key takeaway however is that no single entity in SP network, be it PE, or RR, or ASBR...., ever needs everything, you can always slice and dice indefinitely. So to sum it up you simply can not run into any scaling ceiling with MP-BGP architecture.
The only nodes in our network that have ALL the NLRI is our RR's. Depending on the function of the egress/ingress router, the RR sends it only what it needs for its function. This is how we get away using communities in lieu of VRF's :-). And as Adam points out, those RR's will swallow anything and everything, and still remain asleep. Mark.
Current thread:
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?), (continued)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 21)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 21)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Robert Raszuk (Jun 21)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 23)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Owen DeLong (Jun 23)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 24)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Nick Hilliard (Jun 22)
- RE: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) adamv0025 (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 23)
- BGP flooding Robert Raszuk (Jun 23)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 21)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Mark Tinka (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Randy Bush (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Fletcher Kittredge (Jun 23)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Masataka Ohta (Jun 23)
- RE: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) adamv0025 (Jun 22)
- Re: why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?) Robert Raszuk (Jun 21)