Re: issues about draft-ietf-bfd-rfc5884-clarifications-02

["S. Davari" <[e-mail]>]

Hi Santosh

I think the issue is the first BFD packet that has your Desc =0. Question is how to differentiate them when they are from different ingress LSR.

Regards,
Shahram


> On Jul 16, 2015, at 8:48 PM, Santosh P K <[e-mail]> wrote:
> 
> Hello Deccan, MALLIK and Shahram,
>      I want to understand why do we need this? When BFD bootstrapping is completed then we use local discr (BFD packet your discr) as a key which will be unique with in the local system. Please take a look at below section of RFC 5880.
>  
> https://tools.ietf.org/html/rfc5880#section-6.3
>  
> We don’t need to really use any other fields as we would have exchanged the discr using LSP ping. I might have misunderstood your question and would like to be corrected.
>  
>  
> Thanks
> Santosh P K
>  
> From: Rtg-bfd [mailto:[e-mail]] On Behalf Of [e-mail]
> Sent: Thursday, July 16, 2015 1:00 PM
> To: MALLIK MUDIGONDA (mmudigon)
> Cc: [e-mail]; S. Davari
> Subject: 答复: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02
>  
> 
> Hi Mallik 
> 
> Source address is also a good method. But it is better to form as standard. 
> 
> thanks 
> 
> 
> 
> 
> "MALLIK MUDIGONDA (mmudigon)" <[e-mail]>
> 2015-07-16 下午 02:16 
> 
> 收件人
> "S. Davari" <[e-mail]>, "[e-mail]" <[e-mail]>
> 抄送
> "[e-mail]" <[e-mail]>
> 主题
> Re: issues about draft-ietf-bfd-rfc5884-clarifications-02
>  
> 
> 
> 
> Hi, 
> 
> I think the question is 2 different ingress LSRs using the same FEC, LSP, Discriminator values. Discriminator values can be the same for 2 different ingress LSRs and if the other values are same we can always use the Source address to differentiate. Am I missing something? 
> 
> Regards 
> Mallik 
> 
> From: "S. Davari" <[e-mail]>
> Date: Wednesday, 15 July 2015 20:12
> To: "[e-mail]" <[e-mail]>
> Cc: "[e-mail]" <[e-mail]>
> Subject: Re: issues about draft-ietf-bfd-rfc5884-clarifications-02 
> 
> Hi 
> 
> Why can't the ingress allocate different LD to each of those BFD sessions?
> 
> Regards, 
> Shahram 
> 
> 
> On Jul 15, 2015, at 7:30 AM, "[e-mail]" <[e-mail]> wrote:
> 
> 
> hi authors 
> 
> It is neccessary to address the case that different ingress LSR establish BFD session with the same egress LSR, with same FEC, same local descriminator.
> I think it is very useful to introduce a BFD Initiator TLV to LSP ping echo request message, to distinguish different ingress LSR. So that ingress allocate LD based on tuple <FEC, LSP> as defined in this draft, but egress allocate LD based on tuple <Initiator, FEC, RD>. 
> 
> thanks 
> deccan 
> 
> 
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