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Re: [mpls] Mode negotiation for PSC

Loa Andersson <loa@pi.nu> Mon, 12 August 2013 10:12 UTC

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Date: Mon, 12 Aug 2013 10:27:22 +0200
From: Loa Andersson <loa@pi.nu>
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To: "Eric Osborne (eosborne)" <eosborne@cisco.com>
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Subject: Re: [mpls] Mode negotiation for PSC
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Eric,



On 2013-08-08 14:34, Eric Osborne (eosborne) wrote:
<snip>

> Example of method 2
> -------------------
> Both Node A and Node Z announce two things - Capabilities and Mask.
> Capabilities is a bitmap of the capabilities that are supported.
> Mask is a mask of don't-care bits against the Capabilities string.  A 0 in Mask means "I don't care if we do this capability or not", and a 1 means "we must (or must not) agree on this capability in order to come up".
>
> A.capabilities = 00000
> A.mask         = 00000

Why is this not

  A.capabilities = 11111
  A.mask         = 00000

?

/Loa

>
> This says "I am capable of supporting all capabilities and I don't care if we do any of them or not"
<snip>

-- 


Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64

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