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boundary="_000_MW3PR11MB4651FED3E4009777B8F94FBDB6519MW3PR11MB4651namp_" MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MW3PR11MB4651.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9eac2b94-6b87-4303-95d0-08da9cf6f3b7 X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Sep 2022 00:02:49.0973 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: B+ak2A60D2HalsG7KhpuopznV74efdYSy0XaGSc9rP4cYW1PsRn6y41sVyKMag2pOLIWnnxBHTQCEIam5sVE5g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR11MB7172 X-OriginatorOrg: cisco.com X-Outbound-SMTP-Client: 64.101.210.231, xfe-rtp-001.cisco.com X-Outbound-Node: alln-core-10.cisco.com Archived-At: Subject: Re: [GROW] [Idr] RFC7854: EoR X-BeenThere: grow@ietf.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: Grow Working Group Mailing List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Sep 2022 00:03:23 -0000 --_000_MW3PR11MB4651FED3E4009777B8F94FBDB6519MW3PR11MB4651namp_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable When I wrote route-refresh, that was from the router/sender side, not BMP r= eceiver sending a route-refresh. BMP is still write-only. There are use-cases for re-syncing the RIB to the BMP receiver. Some of th= e methods today are to clear the peer, request a route-refresh in, or to re= set the BMP feed. This is a bit intrusive to the router (sender) and BMP re= ceiver. Having to go to the router to request a refresh to the BMP server, = IMO, is still okay. The problem is that control knobs for refresh are at t= he BGP peer level, not BMP. For Adj-RIB-In Pre-Policy, it makes sense to d= o that on the peer, but for Post-Policy, Adj-RIB-Out and Local-RIB, it does= n=92t really make sense. Having a knob to initiate BMP side refresh would = be very nice and hopefully less intrusive. Regardless of the BMP server needing a refresh, a BMP server does not know = when someone has requested route-refresh IN at the peer level (maybe it was= requested for policy change, =85) Instead, the BMP receiver, blindly, rece= ives a boat load of updates with no awareness that it was a new RIB dump or= controlled refresh. In this case, it would appear to be churn. IMO, there= is value in having a message to signal the receiver that a refresh is comi= ng, followed by an EoR. A PEER_UP could be used for this, but that is intr= usive and misuse of PEER_UP. --Tim On 9/22/22, 11:03 AM, "Jeffrey Haas" wrote: > On Sep 21, 2022, at 7:42 AM, Zhuangshunwan wrote: > > Hi Tim and All, > > I think the idea of a "BMP route refresh" would be appreciated, it will = helps keep the information synchronized between the BMP Server and the BMP = Client. Would someone clarify what they mean by a bmp route refresh? The BMP protocol was intentionally designed as write-only. -- Jeff --_000_MW3PR11MB4651FED3E4009777B8F94FBDB6519MW3PR11MB4651namp_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

When I wrote route-refresh, that was from the router= /sender side, not BMP receiver sending a route-refresh. BMP is still write-= only.

 

There are use-cases for re-syncing the RIB to the BM= P receiver.  Some of the methods today are to clear the peer, request = a route-refresh in, or to reset the BMP feed. This is a bit intrusive to th= e router (sender) and BMP receiver. Having to go to the router to request a refresh to the BMP server, IMO, is still = okay.  The problem is that control knobs for refresh are at the BGP pe= er level, not BMP.  For Adj-RIB-In Pre-Policy, it makes sense to do th= at on the peer, but for Post-Policy, Adj-RIB-Out and Local-RIB, it doesn=92t really make sense.  Having a knob to init= iate BMP side refresh would be very nice and hopefully less intrusive. &nbs= p;

 

Regardless of the BMP server needing a refresh, a BM= P server does not know when someone has requested route-refresh IN at the p= eer level (maybe it was requested for policy change, =85) Instead, the BMP = receiver, blindly, receives a boat load of updates with no awareness that it was a new RIB dump or controlled refr= esh. In this case, it would appear to be churn.  IMO, there is value i= n having a message to signal the receiver that a refresh is coming, followe= d by an EoR.  A PEER_UP could be used for this, but that is intrusive and misuse of PEER_UP.

 

--Tim

 

On 9/22/22, 11:03 AM, &qu= ot;Jeffrey Haas" <jhaas@pfrc.org> wrote:

 



> On Sep 21, 2022, at 7:42 AM, Zhuangshunwan <zhuangshunwan=3D40huawe= i.com@dmarc.ietf.org> wrote:
>
> Hi Tim and All,
> 
> I think the idea of a "BMP route refresh" would be appreciat= ed,  it will helps keep the information synchronized between the BMP S= erver and the BMP Client.

Would someone clarify what they mean by a bmp route refresh?

The BMP protocol was intentionally designed as write-only. 

-- Jeff

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