Re: [Idr] [bess] Type 1 RD for Pure IPv6 network -- EVPN

"Jakob Heitz (jheitz)" <jheitz@cisco.com> Thu, 04 February 2021 04:22 UTC

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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Gyan Mishra <hayabusagsm@gmail.com>, Muthu Arul Mozhi Perumal <muthu.arul@gmail.com>
CC: TULASI RAM REDDY <tulasiramireddy@gmail.com>, "bess@ietf.org" <bess@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] [bess] Type 1 RD for Pure IPv6 network -- EVPN
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Date: Thu, 4 Feb 2021 04:22:25 +0000
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Subject: Re: [Idr] [bess] Type 1 RD for Pure IPv6 network -- EVPN
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<snip RFC4271>
   Syntactic correctness means that the BGP Identifier field represents
   a valid unicast IP host address.
</snip>

     Gyan> I do see that verbiage in section 6.2



   If the BGP Identifier field of the OPEN message is syntactically

   incorrect, then the Error Subcode MUST be set to Bad BGP Identifier.

   Syntactic correctness means that the BGP Identifier field represents

   a valid unicast IP host address.



BGP with IGP call back NH tracker checks the NH but how does BGP code validate the RIB that the router-id is a connected loopback but

and also advertised by IGP.  I have not tried it but if you set a bogus router-id would all the BGP peers go down.

I will try that in the lab.

IOS-XR does not have this check. Nothing breaks by violating this rule. IOS-XR implements RFC 6286.
I think you'll be hard pressed to find a router that checks this.

Regards,
Jakob.