Thanks a lot Jorge. Thanks & Regards Jaikumar S
From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.raba...@nokia.com> Sent: Friday, April 5, 2019 11:11 AM To: Jaikumar Somasundaram <jaikumar.somasunda...@ericsson.com>; bess@ietf.org Cc: P Muthu Arul Mozhi <p.muthu.arul.mo...@ericsson.com> Subject: Re: [bess] DF election rule in EVPN MH, for untagged interface - reg Hi, I think you should check out https://tools.ietf.org/html/draft-ietf-bess-evpn-df-election-framework-09 This draft updates RFC7432 in certain aspects of the DF Election, and it is already at the RFC editor. Check out the use of Ethernet Tag in the document. o Ethernet Tag - used to represent a Broadcast Domain that is configured on a given ES for the purpose of DF election. Note that any of the following may be used to represent a Broadcast Domain: VIDs (including Q-in-Q tags), configured IDs, VNI (VXLAN Network Identifiers), normalized VID, I-SIDs (Service Instance Identifiers), etc., as long as the representation of the broadcast domains is configured consistently across the multi-homed PEs attached to that ES. The Ethernet Tag value MUST be different from zero. Thanks. Jorge From: BESS <bess-boun...@ietf.org<mailto:bess-boun...@ietf.org>> on behalf of Jaikumar Somasundaram <jaikumar.somasunda...@ericsson.com<mailto:jaikumar.somasunda...@ericsson.com>> Date: Friday, April 5, 2019 at 6:15 AM To: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.org>> Cc: P Muthu Arul Mozhi <p.muthu.arul.mo...@ericsson.com<mailto:p.muthu.arul.mo...@ericsson.com>> Subject: [bess] DF election rule in EVPN MH, for untagged interface - reg Hi All, RFC7432, section 8.5, talks about DF election algorithm (service carving algorithm) only for <ES, VLAN> for VLAN-based service or <ES, VLAN bundle> for VLAN-(aware) bundle service. But there wont be any vlan id for untagged interface and so I wonder how the service carving algorithm can be applied to elect the DF. Also, should I use the lower VLAN ID even in the case of VLAN-bundle service, for electing the DF? Could some one help me to understand this please? ==========<snip from RFC 7432, section 8.5>=============== 8.5<https://tools.ietf.org/html/rfc7432#section-8.5>. Designated Forwarder Election … The default procedure for DF election at the granularity of <ES, VLAN> for VLAN-based service or <ES, VLAN bundle> for VLAN-(aware) bundle service is referred to as "service carving". … Assuming a redundancy group of N PE nodes, for VLAN-based service, the PE with ordinal i is the DF for an <ES, VLAN V> when (V mod N) = i. In the case of VLAN-(aware) bundle service, then the numerically lowest VLAN value in that bundle on that ES MUST be used in the modulo function. … =========<snip end>====================================== Thanks & Regards Jaikumar S
_______________________________________________ BESS mailing list BESS@ietf.org https://www.ietf.org/mailman/listinfo/bess
