nanog mailing list archives
Re: Flow Tools AS-Path
From: Jörg Kost <jk () ip-clear de>
Date: Tue, 04 Apr 2023 17:13:33 +0200
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 Phaal wrote:
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 be used for the destination network */ unsigned int as; /* Autonomous system number of router */ unsigned int src_as; /* Autonomous system number of source */ unsigned int src_peer_as; /* Autonomous system number of source peer */ as_path_type dst_as_path<>; /* Autonomous system path to the destination */ unsigned int communities<>; /* Communities associated with this route */ unsigned int localpref; /* LocalPref associated with this route */ } Arista EOS supports aspath if you enable sflow extension bgp. Cisco also claims to support the feature on IOS XR platforms. In addition to BGP, there are a number of MPLS, tunnel encap/decap etc. sFlow extended structures. Also optical interface metrics, dropped packet notifications, and more: https://sflow.org/developers/specifications.php
Current thread:
- Flow Tools AS-Path Mike Hammett (Apr 04)
- Re: Flow Tools AS-Path Dobbins, Roland via NANOG (Apr 04)
- Re: Flow Tools AS-Path Niels Bakker (Apr 04)
- Re: Flow Tools AS-Path Peter Phaal (Apr 04)
- Re: Flow Tools AS-Path Dobbins, Roland via NANOG (Apr 04)
- Re: Flow Tools AS-Path Jörg Kost (Apr 04)