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boundary="_000_PH0PR03MB6300D10CA4C954FBB8ABB8B4F6149PH0PR03MB6300namp_" MIME-Version: 1.0 X-OriginatorOrg: rbbn.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: PH0PR03MB6300.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: e594ae87-2adf-43c3-6788-08dad38d9bf7 X-MS-Exchange-CrossTenant-originalarrivaltime: 01 Dec 2022 11:17:18.6253 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 29a671dc-ed7e-4a54-b1e5-8da1eb495dc3 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: CPimuDSQHBaIc2wADwGJS8rLF5GDfaQ/aHdrhpp0v9TiPWnrd2u3jcJhkzl8VbI0gxKueaZDTad+ZTeZanQ9fg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR03MB6224 Archived-At: Subject: [bess] MAC Move events in EVPN Single Flow-Active Multi-Homing mode X-BeenThere: bess@ietf.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: BGP-Enabled ServiceS working group discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Dec 2022 11:17:33 -0000 --_000_PH0PR03MB6300D10CA4C954FBB8ABB8B4F6149PH0PR03MB6300namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi all, I have a question about handling of MAC Move events in EVPN Single Flow-Ac= tive (SFA) multi-homing. Section 15 of RFC 7432 defines MAC Move events as following (the relevant text is highlighte= d): It is possible for a given host or end-station (as defined by its MAC address) to move from one Ethernet segment to another; this is referred to as 'MAC Mobility' or 'MAC move', and it is different from the multihoming situation in which a given MAC address is reachable via multiple PEs for the same Ethernet segment. With SFA multi-homing, at any given moment each specific customer MAC addr= ess is reachable via just one of the multiple PEs for the same Ethernet se= gment. And indeed, Section 5 of the SFA draft states: When a host moves to PE2 from the PE1 L2GW peer, the MAC mobility sequence number is incremented to signal to remote peers that a 'move' has occurred and the routing tables must be updated to PE2. PE2 and PE1 in Figure 1 in the draft are attached to the same MH ES in SFA= mode, therefore my reading of the quoted text above is that, with SFA mul= ti-homing, MAC Move events are recognized and advertised as such even when= a given host moves between two PEs attached to the same MH ES. However, the quoted text appears in only in Section 5 "Inter-Subnet Forwar= ding" of the draft, and this section contains multiple references to RFC 9= 135. Therefore, it is not clear to me whether the same rule is applicable to th= e scenarios in which SFA multi-homing should be applicable for intra-subne= t forwarding scenarios. My guess (FWIW) that it should be equally applicable, but an explicit clar= ification would be highly appreciated. Regards, and lots of thanks in advance, Sasha Notice: This e-mail together with any attachments may contain information = of Ribbon Communications Inc. and its Affiliates that is confidential and/= or proprietary for the sole use of the intended recipient. Any review, dis= closure, reliance or distribution by others or forwarding without express = permission is strictly prohibited. If you are not the intended recipient, = please notify the sender immediately and then delete all copies, including= any attachments. --_000_PH0PR03MB6300D10CA4C954FBB8ABB8B4F6149PH0PR03MB6300namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi all,

I have a question about handling of MAC Move events in EVPN Single= Flow-Active (SFA) multi-homing.

 

Section 15 of RFC 7432 defines MAC Move events as following (the rele= vant text is highlighted)= :

 

   It is possible for a given host or end-station= (as defined by its MAC

   address)=20to move from one Ethernet segment t= o another; this is

   referred to as 'MAC Mobility' or 'MAC move', a= nd it is different fro= m

   the multihoming sit= uation in which a given MAC address is reachable<= /p>

   via multiple PEs fo= r the same Ethernet segment.

 

 

With SFA multi-homing, at any given moment each specific customer = MAC address is reachable via just one of the multiple PEs for the same Eth= ernet segment.

And indeed,  Section 5 of the SFA draft<= /a> states:

 

   When a host moves to=20PE2 f=
rom the PE1 L2GW peer, the MAC mobility
   sequence number is increment=
ed to signal to remote peers that a
   'move' has occurred and the =
routing tables must be updated to PE2.

 

PE2 and PE1 in Figure 1 in the draft are attached to the same MH E= S in SFA mode, therefore my reading of the quoted text above is that, with= SFA multi-homing, MAC Move events are recognized and advertised as such even when a gi= ven host moves between two PEs attached to the same MH ES.  <= o:p>

 

However,=20the quoted text appears in only in Section 5 "Inte= r-Subnet Forwarding" of the draft, and this section contains multiple= references to RFC 9135.

Therefore, it is not clear to me whether the same rule is applicab= le to the scenarios in which SFA multi-homing should be applicable for int= ra-subnet forwarding scenarios.

My guess (FWIW) that it should be equally applicable, but an expli= cit clarification would be highly appreciated.

 

Regards, and lots of thanks in advance,

Sasha

 


Notice: This e-mail together with any attachments may contain information = of Ribbon Communications Inc. and its Affiliates that is confidential and/= or proprietary for the sole use of the intended recipient. Any review, dis= closure, reliance or distribution by others or forwarding without express = permission is strictly prohibited. If you are not the intended recipient, = please notify the sender immediately and then delete all copies, including= any attachments.
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