Re: [Idr] Review of draft-ietf-large-community-06.txt

Zhuangshunwan <zhuangshunwan@huawei.com> Sat, 05 November 2016 10:29 UTC

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From: Zhuangshunwan <zhuangshunwan@huawei.com>
To: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] Review of draft-ietf-large-community-06.txt
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Date: Sat, 5 Nov 2016 10:28:58 +0000
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Subject: Re: [Idr] Review of draft-ietf-large-community-06.txt
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Hi authors,

I have read this document and it looks good to me!

One comment:

In most of the network operating systems, we must enable neighbor/peer send-community command knob in order BGP speaker include community in routes announcement. 
By default, the BGP speaker does not send/transmit community attributes. Even if the COMMUNITIES path attribute is an optional transitive attribute. This is the current reality application.

So the following case describing in draft-ietf-idr-large-community-06 maybe cannot reflect the reality:
   "Because BGP communities are optional
   transitive BGP attributes, BGP communities may be acted upon or
   otherwise used by routing policies in other Autonomous Systems (ASes)
   on the Internet."

Some customers from IDC/OTT complain that ISPs can not transmit their community attributes, because ISPs do not transmit community attributes in most cases.

Should we clearly define whether LargeCommunity should act different from (or the same with) the RFC1997's Community?

Best Regards,
Shunwan