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Re: [rare-dev] [freertr] deprecated attributes on valid prefixes


Chronological Thread 
  • From: Tim Chown <>
  • To: "" <>, mc36 <>
  • Cc: "" <>, Orosz Emil <>, Simon Leinen <>, "" <>, "net-ad-mins @ niif.hu" <>, "" <>, "" <>, Tony Przygienda <>, Jeffrey Zhang <>
  • Subject: Re: [rare-dev] [freertr] deprecated attributes on valid prefixes
  • Date: Mon, 6 Nov 2023 08:40:18 +0000
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Hi Csaba,

I’m at the IETF now so will be in sessions all week. Which routers exactly
are you referring to? I recall previously there was a suggestion to deploy
alongside GEANT routers.

We have a FreeRtr Wedge on Janet, but that is hosting our 100G network test
facility, so is in production use and we have to be mindful of that.

Best wishes,
Tim

> On 5 Nov 2023, at 16:09, mc36 <> wrote:
>
> final bits on this, i played some more on the connector attrib; i added the
> rewriter support (remove, re-format, etc)
>
> so from the commit below, one can arbitrarily route-map/route-policy
> rewrite the connector attrib if the need arises.... :)
>
> these legacy optional transitive, deprecated / historicals..... i hear you
> out, the need to support the legacy/ancient
>
> installations from the vendors whereas keep the commons peaces on the
> wild-wild-nets (dfz) is an np-hard problem....
>
> https://www.rfc-editor.org/rfc/rfc8093.html vs my all-time favorite
> https://www.rfc-editor.org/rfc/rfc8962.html
>
> now im really scrolling toward to the rest of the findings like the other
> attribs, the evpn l3vpn domain-list
>
> https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-ipvpn-interworking/09/
> its neeeeeeeew!!!!! :)
>
> br,
>
> cs
>
>
> On 11/5/23 14:13, mc36 wrote:
>> hi tim,
>> last week i was tasked by hbone, if i can provide my nren with some tools
>> to have the unknowns unhidden...
>> last friday evening the code went online in-prod @ hbone monitoring
>> freertr instance, then i immediately
>> bugged you on-list that jisc/janet "found guilty" on advertising the
>> -->deprecated/historical/random-padded<--,
>> https://www.rfc-editor.org/rfc/rfc6037.html#section-5.2.1 bgp
>> attribute.... today i had some time to provide
>> a dissector/encoder to the "connector attribute" (wireshark refuses to
>> dissect them properly because of the paddings)
>> so from now i wont bug you anymore on this, however running the code
>> against the fullbgp-feed from hbone i found another
>> /16 from 2 inner jisc/janet/univ routers are unhidden in the outputs
>> below... the fact that your advertisements
>> are having some random paddings sounds more alarming than the fact its in
>> the default-free-zone, instructing the
>> ciscos worldwide from any isp configured to provide legacy multicast
>> services inside (like content providers like
>> bbc, cnn, etc) to initiate an m-gre toward the advertisers then start
>> pim-hellos over the p-msi tunnel...
>> if you have some spare time consider forwarding the mail as-is to the
>> univ/noc who operates the 2 boxes in question;
>> 159.86.161.137 with 137.44.0.0/16, and 92.245.228.53 with 147.143.0.0/16...
>> both prefixes and router-ids are belonging to jisc/janet and arrived here
>> through geant unicast....
>> br,
>> cs
>> sid#
>> sid#
>> sid#packet txt2full /nfs/temp/unk20.txt
>> info userReader.cmdEnter:userReader.java:1227 command sid#packet txt2full
>> /nfs/temp/unk20.txt from console
>> % reading /nfs/temp/unk20.txt
>> % 2 dumps found
>> 2023-11-03 22:00:53 62.40.124.17 -> ::
>> hungarnet-bckp.mx2.zag.hr.geant.net --> null
>> 00000000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> 00000010: 00 6a 02 00 00 00 50 40 01 01 00 40 02 0a 02 02
>> 00000020: 00 00 51 e5 00 00 03 12 40 03 04 3e 28 7c 11 80
>> 00000030: 04 04 00 00 00 14 40 06 00 c0 07 08 00 00 fc 73
>> 00000040: 9f 56 a1 89 c0 08 04 51 e5 00 9b c0 10 08 00 02
>> 00000050: fc 73 00 00 02 9e c0 14 0e 00 01 00 01 9f 56 a1
>> 00000060: 89 02 9e 9f 56 a1 89 10 89 2c
>> +---------+---------------+----------+
>> 21:00:53,000,000 ETHER
>> |0
>> |00|00|00|00|00|00|00|00|00|00|00|00|86|dd|60|00|00|00|00|7e|06|ff|00|00|00|00|00|00|00|00|00|00|ff|ff|3e|28|7c|11|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|b3|00|b3|30|cf|94|07|00|00|00|00|50|00|20|00|4e|91|00|00|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|00|6a|02|00|00|00|50|40|01|01|00|40|02|0a|02|02|00|00|51|e5|00|00|03|12|40|03|04|3e|28|7c|11|80|04|04|00|00|00|14|40|06|00|c0|07|08|00|00|fc|73|9f|56|a1|89|c0|08|04|51|e5|00|9b|c0|10|08|00|02|fc|73|00|00|02|9e|c0|14|0e|00|01|00|01|9f|56|a1|89|02|9e|9f|56|a1|89|10|89|2c|
>> len=87 typ=2 update
>> withdraw len=0
>> attrib len=80
>> attrib typ=1 len=1 origin
>> 00000000: 00
>> attrib typ=2 len=10 aspath
>> 00000000: 02 02 00 00 51 e5 00 00 03 12
>> aspath 20965 786
>> asname GEANT JANET
>> asinfo http://bgp.he.net/AS20965
>> http://ipinfo.io/AS786
>> asmixed 20965-GEANT 786-JANET
>> <---------------------------------------------------------
>> path length 2
>> attrib typ=3 len=4 nexthop
>> 00000000: 3e 28 7c 11
>> nexthop 62.40.124.17
>> attrib typ=4 len=4 metric
>> 00000000: 00 00 00 14
>> metric 20
>> attrib typ=6 len=0 atomicAggr
>> 00000000:
>> atomic aggregator true
>> attrib typ=7 len=8 aggregator
>> 00000000: 00 00 fc 73 9f 56 a1 89
>> aggregator asnum 64627
>> aggregator asnam as64627
>> aggregator router 159.86.161.137
>> attrib typ=8 len=4 stdComm
>> 00000000: 51 e5 00 9b
>> standard community 20965:155
>> attrib typ=16 len=8 extComm
>> 00000000: 00 02 fc 73 00 00 02 9e
>> extended community 2:64627:670
>> attrib typ=20 len=14 connector
>> 00000000: 00 01 00 01 9f 56 a1 89 02 9e 9f 56 a1 89
>> connector router 159.86.161.137
>> <---------------------------------------------------------
>> reachable len=3
>> reachable 137.44.0.0/16
>> <---------------------------------------------------------
>> 2023-11-03 22:00:54 62.40.124.17 -> ::
>> hungarnet-bckp.mx2.zag.hr.geant.net --> null
>> 00000000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> 00000010: 00 6c 02 00 00 00 52 40 01 01 00 40 02 0a 02 02
>> 00000020: 00 00 51 e5 00 00 03 12 40 03 04 3e 28 7c 11 80
>> 00000030: 04 04 00 00 00 14 c0 08 0c 51 e5 00 9b fc 73 00
>> 00000040: 6a fc 90 00 01 c0 10 10 00 02 fc 73 00 00 02 9e
>> 00000050: 00 03 00 28 00 00 00 62 c0 14 0e 00 01 00 01 5c
>> 00000060: f5 e4 35 02 9e 5c f5 e4 35 10 93 8f
>> +---------+---------------+----------+
>> 21:00:54,000,000 ETHER
>> |0
>> |00|00|00|00|00|00|00|00|00|00|00|00|86|dd|60|00|00|00|00|80|06|ff|00|00|00|00|00|00|00|00|00|00|ff|ff|3e|28|7c|11|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|b3|00|b3|30|cf|94|71|00|00|00|00|50|00|20|00|b8|53|00|00|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|ff|00|6c|02|00|00|00|52|40|01|01|00|40|02|0a|02|02|00|00|51|e5|00|00|03|12|40|03|04|3e|28|7c|11|80|04|04|00|00|00|14|c0|08|0c|51|e5|00|9b|fc|73|00|6a|fc|90|00|01|c0|10|10|00|02|fc|73|00|00|02|9e|00|03|00|28|00|00|00|62|c0|14|0e|00|01|00|01|5c|f5|e4|35|02|9e|5c|f5|e4|35|10|93|8f|
>> len=89 typ=2 update
>> withdraw len=0
>> attrib len=82
>> attrib typ=1 len=1 origin
>> 00000000: 00
>> attrib typ=2 len=10 aspath
>> 00000000: 02 02 00 00 51 e5 00 00 03 12
>> aspath 20965 786
>> asname GEANT JANET
>> asinfo http://bgp.he.net/AS20965
>> http://ipinfo.io/AS786
>> asmixed 20965-GEANT 786-JANET
>> <---------------------------------------------------------
>> path length 2
>> attrib typ=3 len=4 nexthop
>> 00000000: 3e 28 7c 11
>> nexthop 62.40.124.17
>> attrib typ=4 len=4 metric
>> 00000000: 00 00 00 14
>> metric 20
>> attrib typ=8 len=12 stdComm
>> 00000000: 51 e5 00 9b fc 73 00 6a fc 90 00 01
>> standard community 20965:155 64627:106 64656:1
>> attrib typ=16 len=16 extComm
>> 00000000: 00 02 fc 73 00 00 02 9e 00 03 00 28 00 00 00 62
>> 00000010:
>> extended community 2:64627:670 3:40:98
>> attrib typ=20 len=14 connector
>> 00000000: 00 01 00 01 5c f5 e4 35 02 9e 5c f5 e4 35
>> connector router 92.245.228.53
>> <---------------------------------------------------------
>> reachable len=3
>> reachable 147.143.0.0/16
>> <---------------------------------------------------------
>> sid#
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> <Screenshot from 2023-11-05 15-57-40.png><Screenshot from 2023-11-05
> 15-57-49.png>




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