Re: [OSPF] PHP route determination in draft-ietf-ospf-segment-routing-extensions-03

2015-04-02 Thread Peter Psenak
Santanu, On 4/2/15 13:32 , Santanu Kar wrote: Hi Peter -Original Message- From: Peter Psenak [mailto:ppse...@cisco.com] Sent: Thursday, April 02, 2015 3:48 PM To: Santanu Kar; ospf@ietf.org; sprev...@cisco.com; cfils...@cisco.com; han...@juniper.net; rob.sha...@bt.com; wim.henderi...@al

Re: [OSPF] PHP route determination in draft-ietf-ospf-segment-routing-extensions-03

2015-04-02 Thread Santanu Kar
Hi Peter -Original Message- From: Peter Psenak [mailto:ppse...@cisco.com] Sent: Thursday, April 02, 2015 3:48 PM To: Santanu Kar; ospf@ietf.org; sprev...@cisco.com; cfils...@cisco.com; han...@juniper.net; rob.sha...@bt.com; wim.henderi...@alcatel-lucent.com Cc: penchala.re...@ipinfusion.co

Re: [OSPF] PHP route determination in draft-ietf-ospf-segment-routing-extensions-03

2015-04-02 Thread Peter Psenak
Santanu, On 4/2/15 11:34 , Santanu Kar wrote: Hi Peter I think, considering we are using Ext Prefix LSA in 'Area-Flooding' scope, A should do PHP for 20.1.1.0/24 if C has advertised it. I do not see why would you do PHP, if B is not advertising the SID. If A doesn’t pop for 20.1.1.0/24, a

Re: [OSPF] PHP route determination in draft-ietf-ospf-segment-routing-extensions-03

2015-04-02 Thread Santanu Kar
Hi Peter I think, considering we are using Ext Prefix LSA in 'Area-Flooding' scope, A should do PHP for 20.1.1.0/24 if C has advertised it. If A doesn’t pop for 20.1.1.0/24, and give the packet to B, it will drop it, since PHP is enabled by default for all nodes. Regards Santanu -Original

Re: [OSPF] PHP route determination in draft-ietf-ospf-segment-routing-extensions-03

2015-04-02 Thread Peter Psenak
Santanu, If B is not advertising a SID for 20.1.1.0/24, then A will not do PHP. regards, Peter On 4/2/15 08:39 , Santanu Kar wrote: SANTANU> Iactually wanted to highlight the non-ABR cases here. Consider the3routers below,in same area. A -10.1.1.0/24- B --20.1.1.0/24 -C In

Re: [OSPF] PHP route determination in draft-ietf-ospf-segment-routing-extensions-03

2015-04-01 Thread Santanu Kar
RE: PHP route determination in draft-ietf-ospf-segment-routing-extensions-03 Hi Peter Please find my responses inline. Regards Santanu -Original Message- From: Peter Psenak [mailto:ppse...@cisco.com ] Sent: Tuesday, March 31, 2015 8:43 PM To: Santanu Kar; ospf@ietf.org; sprev...@cis

Re: [OSPF] PHP route determination in draft-ietf-ospf-segment-routing-extensions-03

2015-03-31 Thread Peter Psenak
Santanu, On 3/31/15 15:20 , Santanu Kar wrote: Hi Authors I think last mail was a bit long to have probably missed the actual point which I was trying to make.Stating it concisely again. The PHP Prefix Segment can be advertised by the neighbor as well as by routers downstream of the neighbor w

Re: [OSPF] PHP route determination in draft-ietf-ospf-segment-routing-extensions-03

2015-03-31 Thread Santanu Kar
RE: PHP route determination in draft-ietf-ospf-segment-routing-extensions-03 Hi Authors I think last mail was a bit long to have probably missed the actual point which I was trying to make. Stating it concisely again. The PHP Prefix Segment can be advertised by the neighbor as well as by rou

[OSPF] PHP route determination in draft-ietf-ospf-segment-routing-extensions-03

2015-03-27 Thread Santanu Kar
Hi Seeking some more clarification in the draft regarding PHP route determination. Please consider the following scenario. SID refers to Prefix Segment Identifier. Router-A: - :Router-B: -( SID-210) :Router-C 10.0.0.0/24 20.0.