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Re: [mpls] [Bier] Encapsulation first nibble

Antoni Przygienda <antoni.przygienda@ericsson.com> Tue, 17 March 2015 17:38 UTC

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From: Antoni Przygienda <antoni.przygienda@ericsson.com>
To: "Zhaohui (Jeffrey) Zhang" <zzhang@juniper.net>, Xuxiaohu <xuxiaohu@huawei.com>, "stbryant@cisco.com" <stbryant@cisco.com>, Eric Rosen <erosen@juniper.net>, BIER <bier@ietf.org>
Thread-Topic: [Bier] Encapsulation first nibble
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Date: Tue, 17 Mar 2015 17:38:28 +0000
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Subject: Re: [mpls] [Bier] Encapsulation first nibble
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Ok, point taken (as are the ECMP/ICMP things that Eric mentioned). I'll watch from the bleachers the data plane fireworks then  ;-) 

--- tony 

> -----Original Message-----
> From: Zhaohui (Jeffrey) Zhang [mailto:zzhang@juniper.net]
> Sent: Tuesday, March 17, 2015 10:36 AM
> To: Antoni Przygienda; Xuxiaohu; stbryant@cisco.com; Eric Rosen; BIER
> Cc: mpls@ietf.org; sfc@ietf.org
> Subject: RE: [Bier] Encapsulation first nibble
> 
> Today those "heuristics" are typically used in very specific deployments where an
> operator knows well what kind of traffic is going through their MPLS
> infrastructure.
> 
> As Eric mentioned in the other message, a nibble value specific to BIER might be
> useful for other purpose than ECMP entropy, and if such a value is standardized
> (like value 0 and 1 that are reserved for PWs), then it helps reduce the clashing
> with random/hacky heuristics usages.
>

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