Re: [mpls] RtgDir review: draft-ietf-mpls-egress-ptotection-framework-03

Yimin Shen <yshen@juniper.net> Thu, 29 November 2018 14:53 UTC

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From: Yimin Shen <yshen@juniper.net>
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, "draft-ietf-mpls-egress-protection-framework.all@ietf.org" <draft-ietf-mpls-egress-protection-framework.all@ietf.org>, "rtg-ads@ietf.org" <rtg-ads@ietf.org>
Thread-Topic: RtgDir review: draft-ietf-mpls-egress-ptotection-framework-03
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/O9VtlGqb2oVMtLNpnCAGjhp29Bg>
Subject: Re: [mpls] RtgDir review: draft-ietf-mpls-egress-ptotection-framework-03
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Hi Sasha,

Thanks again!

[[Sasha]] Would it not be simpler to say that, regardless of the way the primary egress PE allocates its VPN application labels, the Protector should always treat them as pointing to the relevant VRF and performing context IP forwarding? The logic that matches routes learned by the primary egress PE and by the Protector would be complicated and eventually could fall back to the same scheme – so what is the gain?

Good suggestion. We will say that, and point out the couple of possible optimizations (as described in my previous response) with risk of overhead and complexity.

Thanks,

-- Yimin


From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>;
Date: Thursday, November 29, 2018 at 3:50 AM
To: Yimin Shen <yshen@juniper.net>;
Cc: "rtg-dir@ietf.org"; <rtg-dir@ietf.org>;, "mpls@ietf.org"; <mpls@ietf.org>;, "draft-ietf-mpls-egress-protection-framework.all@ietf.org"; <draft-ietf-mpls-egress-protection-framework.all@ietf.org>;, "rtg-ads@ietf.org"; <rtg-ads@ietf.org>;
Subject: RE: RtgDir review: draft-ietf-mpls-egress-ptotection-framework-03

[[Sasha]] Would it not be simpler to say that, regardless of the way the primary egress PE allocates its VPN application labels, the Protector should always treat them as pointing to the relevant VRF and performing context IP forwarding? The logic that matches routes learned by the primary egress PE and by the Protector would be complicated and eventually could fall back to the same scheme – so what is the gain?