Re: Cisco Nexus 3k Route Selection\Packet Forwarding Debugging

2023-04-04 Thread Nick Olsen
Not that it's a "Fix" but have you tried rebooting the box? If this is a bug in the forwarding plane that might clear/rebuild it. And maybe it works correctly after that. Friend saw something similar on a Juniper MX with DPC cards that had run out of FIB space. It would show correctly in all

Re: Cisco Nexus 3k Route Selection\Packet Forwarding Debugging

2023-04-04 Thread Mike Hammett
Via all mechanisms I could find in the router, it thinks the best path is the direct path, the packets just don't go that way. The in traffic isn't a concern at this time, just the out (from my perspective). - Mike Hammett Intelligent Computing Solutions http://www.ics-il.com

Re: Cisco Nexus 3k Route Selection\Packet Forwarding Debugging

2023-04-04 Thread David Bass
If you are both connected to the same upstream, but the customer wants traffic destined to the upstream to go through you (in and out), then they need to do something on their devices to try and affect the inbound path to their AS. From the upstream carrier in question they’ll take the best path

Re: 100G-LR1 (DR/FR)

2023-04-04 Thread Tyler Conrad
Tangentially related to xR1, have any of you started deploying SN connectors on your 400G head-ends? It looks like a pretty clever technology, adding discrete connectors per lane, but curious what the adoption has been thus far. On Tue, Apr 4, 2023 at 8:55 AM Mikael Abrahamsson via NANOG wrote:

Re: SF union square area fiber

2023-04-04 Thread Dave Taht
That is a very illustrative photo of the state of the internet plant, even today. I hope you find it! On Tue, Apr 4, 2023 at 8:51 AM Bill Woodcock wrote: > > > On Apr 4, 2023, at 5:39 PM, Jared Mauch wrote: > > Can someone who is familiar with the fiber assets around the union square > > area

Re: 100G-LR1 (DR/FR)

2023-04-04 Thread Mikael Abrahamsson via NANOG
On Tue, 4 Apr 2023, Jared Mauch wrote: We are willing to do 100G-LR1 if someone asks these days. It lets us be able to roll it up into 400G optics on our side as appropriate. I hope the industry moves to 100G-LR1, as doing 2x100GBASE-LR4 in a 400G port is quite meh when it comes to

Re: SF union square area fiber

2023-04-04 Thread Bill Woodcock
> On Apr 4, 2023, at 5:39 PM, Jared Mauch wrote: > Can someone who is familiar with the fiber assets around the union square > area in SF ping me off-list? Heh. Somewhere, I have photos that Steve Feldman and I took while spelunking around under there trying to find fiber for the NANOG that

Re: 100G-LR1 (DR/FR)

2023-04-04 Thread Jared Mauch
> On Apr 3, 2023, at 4:54 PM, Tony Wicks wrote: > > I have been using the QSFP-100G-CWDM4 2k optics for within rack/DC for a > couple of years now. They are about the same price as SR optics but allow the > use of simple duplex single mode patches without blasting 10K optics at each >

Re: 100G-LR1 (DR/FR)

2023-04-04 Thread Jared Mauch
We are willing to do 100G-LR1 if someone asks these days. It lets us be able to roll it up into 400G optics on our side as appropriate. The big difference in DR/FR is the receiver sensitivity, they are all compatible optically, so it’s really about the DR/FR being yield rejects for LR1.

SF union square area fiber

2023-04-04 Thread Jared Mauch
Can someone who is familiar with the fiber assets around the union square area in SF ping me off-list? Thanks. - jared

Re: Flow Tools AS-Path

2023-04-04 Thread Jörg Kost
Hi, Extreme also supports it, and we use it for conducting statistics against dst_as/dst_peer_as to perform "traffic engineering" specifically for the transit paths. dst_as_path can also identify possible future peering situations or undesirable paths. BR Jörg On 4 Apr 2023, at 16:48, Peter

Re: Flow Tools AS-Path

2023-04-04 Thread Dobbins, Roland via NANOG
On 4 Apr 2023, at 21:48, Peter Phaal mailto:peter.ph...@gmail.com>> wrote: Export of destination AS-Path is supported in the sFlow extended_gateway structure. As a consumer of sFlow, [as well as NetFlow, IPFIX, etc.] I haven’t run into the use of this option in production, FWIW. In

Re: Flow Tools AS-Path

2023-04-04 Thread Peter Phaal
Export of destination AS-Path is supported in the sFlow extended_gateway structure. /* Extended Gateway Data */ /* opaque = flow_data; enterprise = 0; format = 1003 */ struct extended_gateway { next_hop nexthop; /* Address of the border router that should

Re: Flow Tools AS-Path

2023-04-04 Thread Niels Bakker
* na...@ics-il.net (Mike Hammett) [Tue 04 Apr 2023, 15:06 CEST]: 1) How common is it to have the additional extensions to include that data for analysis? pmacct is a commonly used tool to enrich flow data with such information. -- Niels.

Re: Flow Tools AS-Path

2023-04-04 Thread Dobbins, Roland via NANOG
On 4 Apr 2023, at 20:04, Mike Hammett mailto:na...@ics-il.net>> wrote: 2) I have seen flow tools that show the entire AS path. Are they just cherry picking which platforms they showcase for the best marketing, or are they enriching the data they receive from "lesser" platforms from an outside

Flow Tools AS-Path

2023-04-04 Thread Mike Hammett
One of the reasons to analyze flow data is to make purchase\peering decisions. The sFlow standard seems to only include source and destination AS, though I know some route platforms have extensions to provide additional data. 1) How common is it to have the additional extensions to include

Re: Cisco Nexus 3k Route Selection\Packet Forwarding Debugging

2023-04-04 Thread Mike Hammett
sh ip bgp neighbor advertised-routes shows the only routes being advertised to Y are the routes that should be advertised to them. I checked a variety of other peers and have the expected results. >From my perspective: Packets come in on port A, supposed to leave on port X, but

Re: 100G-LR1 (DR/FR)

2023-04-04 Thread Brandon Butterworth
On Tue Apr 04, 2023 at 08:54:55AM +1200, Tony Wicks wrote: > I have been using the QSFP-100G-CWDM4 2k optics for within rack/DC > for a couple of years now. They are about the same price as SR optics > but allow the use of simple duplex single mode patches without blasting > 10K optics at each