At this stage we defined the solution such that a given SID/Label is associated with 1 algorithm.
From: Veerendranatha Reddy Vallem <veerendranath...@huawei.com<mailto:veerendranath...@huawei.com>> Date: Sunday 28 September 2014 08:47 To: Wim Henderickx <wim.henderi...@alcatel-lucent.com<mailto:wim.henderi...@alcatel-lucent.com>>, "spring@ietf.org<mailto:spring@ietf.org>" <spring@ietf.org<mailto:spring@ietf.org>> Subject: Re: [spring] Regarding SID/Lable distributed by IGPs Hi Henderick, Thanks for your reply. Yes, I found algorithm filed in TLVs. While constructing LSP , whether we need to provide the algorithm mapping information along with label/SID ? I think for construction of label stack ,it required to know what label represents (whether it is shortest path or best path to the given node/prefix), so we should have algorithm mapping information also along with label in SIDB. Please let me know if my understanding is wrong . Whether we can use multiple algorithms to represent same Node SID ? Regards, Veerendranath From: Henderickx, Wim (Wim) [mailto:wim.henderi...@alcatel-lucent.com] Sent: 28 September 2014 14:29 To: Veerendranatha Reddy Vallem; spring@ietf.org<mailto:spring@ietf.org> Subject: Re: [spring] Regarding SID/Lable distributed by IGPs In the OSPF/ISIS drafts on SR we scoped an algorithm field which could be used for this purpose. So besides shortest path you could use a different algorithm. From: Veerendranatha Reddy Vallem <veerendranath...@huawei.com<mailto:veerendranath...@huawei.com>> Date: Sunday 28 September 2014 08:15 To: "spring@ietf.org<mailto:spring@ietf.org>" <spring@ietf.org<mailto:spring@ietf.org>> Subject: [spring] Regarding SID/Lable distributed by IGPs Hi, I have a small query related to SID distributed by IGPs in the SR. Can anybody help me to clarify this. The SID/Label distributed by IGPs (OSPF or ISIS) for the prefixes/Nodes should represent Shortest Path to the given prefix or node? We can use same Labels for other representation like Best Effort Path also ? (The label distribution done by OSPF, but the next-hop for the node is calculated by other IGPs based on administrative decision) Regards, Veerendranath
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