Hi all,
I find some conflicting rules about interface-to-VRF binding between
draft-ietf-rtgwg-ni-model-12 and draft-ietf-bess-l2vpn-yang-09.txt.
It is as below:
RULE1: [NI-model] Section 3.2 says that:
The bind-network-instance-name leaf provides the association between an
interface and its associated NI (e.g., VRF or VSI).
RULE2: [draft-ietf-bess-evpn-yang-06] Section 3.3 says that:
augment
/ni:network-instances/ni:network-instance/ni:ni-type/l2vpn:l2vpn:
+--rw evpn-instance? evpn-instance-ref
and [draft-ietf-bess-l2vpn-yang-09.txt] Section 3.6.3 says that:
Each entry in the endpoint list, may hold AC, PW or redundancy-grp
references. The core aspect of endpoint container is its flexible
personality based on what user decides to include in it. It is
future-proofed with possible extensions that can be included in the
endpoint container such as Integrated Route Bridging (IRB), PW
Headend, Virtual Switch Instance, etc.
According to the RULE1, The bind-network-instance-name leaf provides the
association between an interface and its associated MAC-VRF or IP-VRF.
According to the RULE2, IRB/AC interface is associated to it's EVPN MAC-VRF via
the "end-point" entry.
So I have the follow two questions:
Question 1: How should I bind an AC to it's EVPN MAC-VRF according to these
drafts?
Question 2: How should I bind an IRB interface to it's EVPN MAC-VRF and EVPN
IP-VRF according to these drafts?
For Question 1, my understanding is as below:
I should follow the RULE2 to bind an AC to it's associated EVPN MAC-VRF.
The RULE1 doesn't work for L2VPN ACs,
because if the RULE1 is applied to the association between AC and its
associated MAC-VRF,
It should be applied to the association between IRB interface and its
associated MAC-VRF too.
But obviously the RULE1 should be applied to the association between IRB
interface and its associated IP-VRF.
Consequently, for Question 2, my understanding is as below:
I should follow the RULE1 to bind an IRB to it's associated EVPN IP-VRF.
I should follow the RULE2 to bind an IRB to it's associated EVPN MAC-VRF.
Is my understanding correct?
Best Regards
Bob_______________________________________________
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