nanog mailing list archives
Re: Devil's Advocate - Segment Routing, Why?
From: Mark Tinka <mark.tinka () seacom mu>
Date: Sun, 21 Jun 2020 22:00:42 +0200
On 21/Jun/20 19:34, Robert Raszuk wrote:
That is true for P routers ... not so much for PEs. Please observe that label space in each PE router is divided for IGP and BGP as well as other label hungy services ... there are many consumers of local label block. So it is always the case that LFIB table (max 2^20 entries - 1M) on PEs is much larger then LFIB on P nodes.
I should point out that all of my input here is based on simple MPLS forwarding of IP traffic in the global table. In this scenario, labels are only assigned to BGP next-hops, which is typically an IGP Loopback address. Labels don't get assigned to BGP routes in a global table. There is no use for that. Of course, as this is needed in VRF's and other BGP-based VPN services, the extra premium customers pay for that priviledge may be considered warranted :-). Mark.
Current thread:
- Re: Devil's Advocate - Segment Routing, Why?, (continued)
- Re: Devil's Advocate - Segment Routing, Why? Baldur Norddahl (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 21)
- RE: Devil's Advocate - Segment Routing, Why? adamv0025 (Jun 22)
- Re: Devil's Advocate - Segment Routing, Why? Masataka Ohta (Jun 20)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 20)
- Re: Devil's Advocate - Segment Routing, Why? Masataka Ohta (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Robert Raszuk (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Robert Raszuk (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Robert Raszuk (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Robert Raszuk (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 21)
- RE: Devil's Advocate - Segment Routing, Why? adamv0025 (Jun 22)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 19)
- RE: Devil's Advocate - Segment Routing, Why? adamv0025 (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 21)
- Re: Devil's Advocate - Segment Routing, Why? Masataka Ohta (Jun 19)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 20)