[AusNOG] AARNet AS path prepending on Equinix IX

[Ben Thompson]

Hi all,

As anyone else noticed that AARNet seems to be AS Path prepending routes shared on the Equinix IX in Sydney? We have a couple of customers on AARNet and from about the 26th March, their traffic has been hitting our transit links instead of coming in on the IX.

sh bgp ipv4 uni 103.4.85.91
BGP routing table entry for 103.4.85.0/24, version 249751511
Paths: (4 available, best #4, table default)
Multipath: eBGP
  Advertised to update-groups:
     1
  4826 7575 58528, (aggregated by 58528 10.100.100.11)
    103.29.52.1 (metric 2) from 103.29.52.1 (103.29.52.1)
      Origin IGP, metric 0, localpref 100, valid, internal, atomic-aggregate
  17819 7575 7575 58528, (aggregated by 58528 10.100.100.11)
    103.13.68.9 from 103.13.68.9 (27.111.240.3)
      Origin IGP, localpref 100, valid, external, atomic-aggregate
      Community: 24115:65220
  7575 7575 58528, (aggregated by 58528 10.100.100.11)
    202.167.228.46 from 202.167.228.122 (202.167.228.122)
      Origin IGP, metric 68, localpref 100, valid, external, atomic-aggregate
  7575 7575 58528, (aggregated by 58528 10.100.100.11)
    202.167.228.46 from 202.167.228.123 (202.167.228.123)
      Origin IGP, metric 68, localpref 100, valid, external, atomic-aggregate, best

Already emailed the NOC, just wondering if anyone else had noticed this.

Thanks,
Ben
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