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[bess] Query/comments on draft-ietf-bess-evpn-lsp-ping-05

"Dikshit, Saumya" <saumya.dikshit@hpe.com> Thu, 02 September 2021 17:42 UTC

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From: "Dikshit, Saumya" <saumya.dikshit@hpe.com>
To: "draft-ietf-bess-evpn-lsp-ping@ietf.org" <draft-ietf-bess-evpn-lsp-ping@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Thread-Topic: Query/comments on draft-ietf-bess-evpn-lsp-ping-05
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Date: Thu, 2 Sep 2021 17:42:07 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/_DZ-K-l6PmFrT8dWJn5A4jW9dQI>
Subject: [bess] Query/comments on draft-ietf-bess-evpn-lsp-ping-05
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[sending the queries in a different email with changed subject line]

Hello Authors of draft-ietf-bess-evpn-lsp-ping draft,

I have following queries regarding this draft:

>>>> Do we intend-to-use/call-out-usage-of "wild-card/don't-care" values for attributes carried in the sub-TLVs ?
For example, If the admin intends  to check the reachability to host (MAC_X/IP_X) published (in route-type-2)  by remote PE.
The remote PE learnt it locally over ESI_X against Vlan X (mapped to BD_XYZ).

Is it possible, that the "EVPN MAC sub-tlv"  can carry the "Route Distinguisher" and "Ethernet Segment Identifier" as don't care.

>>>> Another caseto handle would be test the reachability to tenant-VRF VRF_X (with EVPN mapped EVI) configured on the remote PE, PE1.
VRF_X has no active IP/IPv6 interface configured and its sole usage is to obtain the leaked (via IVRL) routes from other VRFs (non-EVPN) and PE1 published this to other peers via EVPN control plane. Till the first prefix (learnt ) route is published (Route Type 5) by PE1 for the EVI (mapped to VRF_X), the tunnels will not be provisioned on other PEs.
In order to test the reachability to VRF_X (on PE1) from another PEs, let's say, PE2 or a centralized-controller (which can emulate/supports MPLS),

It may need to carry all/subset-of attributes with "don't-care/wild-card" in "EVPN IP Prefix Sub-TLV".


Please let know your thoughts on above.

Thanks
Saumya.

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