Re: [Lsr] Clarification on RFC 7794

[Shraddha Hegde]

Les,

Thank you for the clarification.

Rgds
Shraddha



Juniper Business Use Only
From: Les Ginsberg (ginsberg) 
Sent: Thursday, November 18, 2021 8:36 PM
To: Shraddha Hegde ; lsr@ietf.org
Subject: RE: Clarification on RFC 7794

[External Email. Be cautious of content]

Shraddha -

In the case you mention (redistribution from another protocol), the advertised 
router-id would be the ID of the originating router in the source protocol for 
redistribution.
In your example, this ID would come from OSPF. However, the term "router-id" 
means something different in OSPF. The corresponding identifier would come from 
the OSPF "Router Address TLV" defined in RFC 3630.

I am trying to be precise here. I wasn't certain when you used the term 
"redistributing router" whether you were referring to the source protocol or 
the destination protocol for redistribution.

   Les


From: Lsr mailto:lsr-boun...@ietf.org>> On Behalf Of 
Shraddha Hegde
Sent: Thursday, November 18, 2021 12:37 AM
To: lsr@ietf.org<mailto:lsr@ietf.org>
Subject: [Lsr] Clarification on RFC 7794

WG,


I am looking for clarification on below text in RFC 7794 sec 2.2


"Note that the Router ID advertised is always the Router ID of the

   IS-IS instance that originated the advertisement.  This would be true

   even if the prefix had been learned from another protocol (i.e., with

   the X-flag set as defined in Section 
2.1<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/rfc7794*section-2.1__;Iw!!NEt6yMaO-gk!TsPnm1bOgtMrsa_zhSpVlUmP8Gzlx5OYh6JYnHw9hS2XuHuZx-YXZcsM-Q7O46xQ$>)"


If a router is re-distributing a prefix from another ISIS instance it would put 
the source router-id of the
Originating router. If the prefix is being redistributed from another protocol 
(say OSPF) the source router-id of the
Prefix would be set to the router-id of the redistributing router. Is this the 
correct interpretation?

Rgds
Shraddha


Juniper Business Use Only
___
Lsr mailing list
Lsr@ietf.org
https://www.ietf.org/mailman/listinfo/lsr

Re: [Lsr] Clarification on RFC 7794

[Les Ginsberg (ginsberg)]

Shraddha -

In the case you mention (redistribution from another protocol), the advertised 
router-id would be the ID of the originating router in the source protocol for 
redistribution.
In your example, this ID would come from OSPF. However, the term "router-id" 
means something different in OSPF. The corresponding identifier would come from 
the OSPF "Router Address TLV" defined in RFC 3630.

I am trying to be precise here. I wasn't certain when you used the term 
"redistributing router" whether you were referring to the source protocol or 
the destination protocol for redistribution.

   Les


From: Lsr  On Behalf Of Shraddha Hegde
Sent: Thursday, November 18, 2021 12:37 AM
To: lsr@ietf.org
Subject: [Lsr] Clarification on RFC 7794

WG,


I am looking for clarification on below text in RFC 7794 sec 2.2


"Note that the Router ID advertised is always the Router ID of the

   IS-IS instance that originated the advertisement.  This would be true

   even if the prefix had been learned from another protocol (i.e., with

   the X-flag set as defined in Section 
2.1<https://datatracker.ietf.org/doc/html/rfc7794#section-2.1>)"


If a router is re-distributing a prefix from another ISIS instance it would put 
the source router-id of the
Originating router. If the prefix is being redistributed from another protocol 
(say OSPF) the source router-id of the
Prefix would be set to the router-id of the redistributing router. Is this the 
correct interpretation?

Rgds
Shraddha


Juniper Business Use Only
___
Lsr mailing list
Lsr@ietf.org
https://www.ietf.org/mailman/listinfo/lsr

[Lsr] Clarification on RFC 7794

[Shraddha Hegde]

WG,


I am looking for clarification on below text in RFC 7794 sec 2.2


"Note that the Router ID advertised is always the Router ID of the

   IS-IS instance that originated the advertisement.  This would be true

   even if the prefix had been learned from another protocol (i.e., with

   the X-flag set as defined in Section 
2.1)"


If a router is re-distributing a prefix from another ISIS instance it would put 
the source router-id of the
Originating router. If the prefix is being redistributed from another protocol 
(say OSPF) the source router-id of the
Prefix would be set to the router-id of the redistributing router. Is this the 
correct interpretation?

Rgds
Shraddha


Juniper Business Use Only
___
Lsr mailing list
Lsr@ietf.org
https://www.ietf.org/mailman/listinfo/lsr