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Re: [Lsr] draft-ietf-ospf-ospfv3-segment-routing-extensions - small change

"Acee Lindem (acee)" <acee@cisco.com> Thu, 15 November 2018 15:25 UTC

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Peter Psenak (ppsenak)" <ppsenak@cisco.com>, "lsr@ietf.org" <lsr@ietf.org>
CC: "Goethals, Dirk (Nokia - BE/Antwerp)" <dirk.goethals@nokia.com>, Mahendra Singh Negi <mahendrasingh@huawei.com>
Thread-Topic: [Lsr] draft-ietf-ospf-ospfv3-segment-routing-extensions - small change
Thread-Index: AQHUfPJQr883CeREQkG46srmjDPbjqVQ9PCA
Date: Thu, 15 Nov 2018 15:25:20 +0000
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Subject: Re: [Lsr] draft-ietf-ospf-ospfv3-segment-routing-extensions - small change
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Hi Peter, 
I agree - it is not needed in OSPFv3 Extended LSAs.

Hi Dirk, Mahendra, 

How will this impact your implementations?

Thanks,
Acee

On 11/15/18, 9:48 AM, "Lsr on behalf of Peter Psenak (ppsenak)" <lsr-bounces@ietf.org on behalf of ppsenak@cisco.com> wrote:

    Hi,
    
    as a part of the RtgDir review we got a comment about the usage of the 
    IA bit in the OSPFv3 Extended Prefix Range TLV (Section 5).
    
    We defined this bit for OSPFv2 originally. In OSPFv2 Extended Prefix 
    Range TLV is carried as a top level TLV of the Extended Prefix Opaque 
    LSA, which is not specific to any route-type, so we needed a mechanism 
    to prevent redundant flooding of Prefix Range TLVs between areas.
    
    In OSPFv3 however, we are advertising the Extended Prefix Range TLV in 
    the type specific LSAs, so we can use standard rules to prevent the 
    "looping" of advertisements.
    
    So we want to remove the IA bit from the flags field in OSPFv3 Extended 
    Prefix Range TLV.
    
    I would like to know whether anyone has any objection.
    
    thanks,
    Peter
    
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