EVPN VPWS as VRF Attachment Circuit
draft-wz-bess-evpn-vpws-as-vrf-ac-00
BESS WG Y. Wang
Internet-Draft Z. Zhang
Intended status: Standards Track ZTE Corporation
Expires: 19 March 2021 15 September 2020
EVPN VPWS as VRF Attachment Circuit
draft-wz-bess-evpn-vpws-as-vrf-ac-00
Abstract
When a VRF Attachment Cirucit (VRF-AC) is far away from its IP-VRF
instance, we can deploy an EVPN VPWS ([RFC8214]) between that VRF-AC
and its IP-VRF instance. From the viewpoint of the IP-VRF instance,
a local virtual interface takes the place of that remote "VRF-AC".
The intended IP address for that VRF-AC is now configured to the
virtual interface, in other words, the virtual interface is the
actual VRF-AC of the IP-VRF instance. The virtual interface is also
the AC of that VPWS instance, in other words, the virtual interface
is cross-connected to that remote "VRF-AC" by the VPWS instance.
This document proposes an extension to [RFC7432] to support this
scenario.
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document authors. All rights reserved.
Wang & Zhang Expires 19 March 2021 [Page 1]
Internet-Draft EVPN VPWS as VRF-AC September 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Integrated Routing and Cross-connecting . . . . . . . . . 3
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
2. ARP/ND Synching and IP Prefix Synching . . . . . . . . . . . 5
2.1. Constructing MAC/IP Advertisement Route . . . . . . . . . 6
2.2. Constructing Ethernet A-D Route . . . . . . . . . . . . . 6
2.3. Constructing IP Prefix Advertisement Route . . . . . . . 6
3. Packet Walk Through . . . . . . . . . . . . . . . . . . . . . 7
4. Fast Convergence for Routed Traffic . . . . . . . . . . . . . 8
5. Considerations on ABRs and Route Reflectors . . . . . . . . . 8
6. Security Considerations . . . . . . . . . . . . . . . . . . . 8
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
8. Normative References . . . . . . . . . . . . . . . . . . . . 8
9. Informative References . . . . . . . . . . . . . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction
When a VRF Attachment Cirucit (VRF-AC) is far away from its IP-VRF
instance, we can deploy an EVPN VPWS ([RFC8214]) between that VRF-AC
and its IP-VRF instance. From the viewpoint of the IP-VRF instance,
a local virtual interface takes the place of that remote "VRF-AC".
The intended IP address for that VRF-AC is now configured to the
virtual interface, in other words, the virtual interface is the
actual VRF-AC of the IP-VRF instance. The virtual interface is also
the AC of that VPWS instance, in other words, the virtual interface
is cross-connected to that remote "VRF-AC" by the VPWS instance.
The requirements of this scenario is described in Section 1.1.
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1.1. Integrated Routing and Cross-connecting
When an IP-VRF instance and an EVPN VPWS instance are connected by an
virtual-interface, We call such scenarios as Integrated Routing and
Cross-connecting (IRC) use-case, and the virtual-interface connecting
EVPN VPWS and IP-VRF is called as IRC interface, because that the
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