Re: [Idr] IETF LC for IDR-ish document <draft-ietf-grow-bgp-reject-05.txt> (Default EBGP Route Propagation Behavior Without Policies) to Proposed Standard

<bruno.decraene@orange.com> Thu, 20 April 2017 16:47 UTC

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From: <bruno.decraene@orange.com>
To: Jared Mauch <jared@puck.Nether.net>
CC: "idr@ietf.org" <idr@ietf.org>, Hares Susan <shares@ndzh.com>, Enke Chen <enkechen@cisco.com>, "aretana@cisco.com" <aretana@cisco.com>
Thread-Topic: [Idr] IETF LC for IDR-ish document <draft-ietf-grow-bgp-reject-05.txt> (Default EBGP Route Propagation Behavior Without Policies) to Proposed Standard
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Date: Thu, 20 Apr 2017 16:47:14 +0000
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References: <D4E812E8-AA7B-4EA2-A0AC-034AA8922306@juniper.net> <abe393d3-d1e4-7841-4620-38dab751765b@cisco.com> <68B29403-9AD9-4F06-9FE4-3F077E793D9F@puck.nether.net> <275cf744-1f64-bcbc-dabe-a47479921230@cisco.com> <20170420154142.lacvtplusepy3qcf@hanna.meerval.net> <b57162ec-f806-6e86-7713-58608f72c468@cisco.com> <20170420160736.GB15676@puck.nether.net>
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Subject: Re: [Idr] IETF LC for IDR-ish document <draft-ietf-grow-bgp-reject-05.txt> (Default EBGP Route Propagation Behavior Without Policies) to Proposed Standard
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Jared,

> From: Jared Mauch > Sent: Thursday, April 20, 2017 6:08 PM
> 
 > On Thu, Apr 20, 2017 at 08:57:07AM -0700, Enke Chen wrote:
 > > Job,
 > >
 > > It depends on the customer base and also how long the software has been deployed.
 > > Just think about the scenario that a large number of customers would lose network
 > > connectivity unexpectedly due to a default behavior change in the code. Such outages
 > > could keep happening to different customers for years to come.
 > >
 > > Perhaps, changing "impossible" to "impractical" :-)
 > 
 > 	I'd like to call it well-considered. :-)
 > 
 > 	I'm operating a network with Juniper, NX-OS, IOS-XR, IOS-Classic, IOS-XE,
 > and various implementations that require custom policy to be implemented.
 > 
 > 	There can be a path forward plotted that would prevent currently
 > deployed people from having issues, we're surely bright enough to do that.
 > 
 > 	To make it clear: I don't want to break someones routers.
 > 
 > 	I do want to make it harder for someone to leak a table when they
 > have a new router.

Have you considered starting solving this issue with yang model? Although this is more long term, this should be the target/long term solution and hence this has a significant value. Also the installed based is smaller so change would be easier. And finally, this probably natively only applies to new EBGP sessions, i.e. would not affect existing deployed based.
e.g. the (mandatory) default import/export policy would be to filter all routes. 
 
Regards,
--Bruno (just trying to propose something, feel free to ignore)

 > 	I don't belive the bar should be high, it can be embedded in whatever
 > configuration/ZTP/automation/cut+paste template out there.  It could come
 > in the form of yang over netconf, or a DHCPv6/DHCPv4 option.  It could
 > come from a TXT record in DNS, or wahtever configuration method the vendor
 > invents that is new and unimagined by th WG today.
 > 
 > 	I don't feel it requires updating 4271 to attain that goal, it's
 > clear implementors have seen a path to do this today without having
 > a concern with 4271, and I believe that Alvaro is wrong in the presumption
 > this document updates 4271.  (I'm also willing to be told that I'm too rough
 > for consensus :-).
 > 
 > 	- Jared
 > 
 > --
 > Jared Mauch  | pgp key available via finger from jared@puck.nether.net
 > clue++;      | http://puck.nether.net/~jared/  My statements are only mine.
 > 
 > _______________________________________________
 > Idr mailing list
 > Idr@ietf.org
 > https://www.ietf.org/mailman/listinfo/idr

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