https://social.bgp.tools/@bgptools/statuses/01K7072TB9HS4JYN8E5Z01GEPK On Tue, Oct 7, 2025 at 3:50 PM Jon Forbes <jforbes@americomnetworks.com> wrote:
I am getting this same error on my Cisco 9K.
-----Original Message----- From: Mark Kane <markk@honeycomb.net> Sent: Tuesday, October 7, 2025 3:41 PM To: Jay Hanke <jayhanke@southfront.io> Cc: mice-discuss@lists.micemn.net Subject: RE: v6 on rs1/rs2 fubar?
FWIW, we saw this from rs1/rs2 on a Cisco:
Oct 7 14:49:10 CDT: bgp[1087]: %ROUTING-BGP-3-MALFORM_UPDATE : Malformed UPDATE message received from neighbor 2001:504:27::d1af:0:2 (VRF: default) - message length 171 bytes, error flags 0x00000100, action taken "TreatAsWdr". Error details: "Error 0x00000100, Field "Attr-length", Attribute 35 (Flags 0xe0, Length 1024), Data [f0230400]". NLRIs: [IPv6 Unicast] 2402:2de0::/32 Oct 7 15:18:11 CDT: bgp[1087]: %ROUTING-BGP-3-MALFORM_UPDATE : Malformed UPDATE message received from neighbor 2001:504:27::d1af:0:1 (VRF: default) - message length 171 bytes, error flags 0x00000100, action taken "TreatAsWdr". Error details: "Error 0x00000100, Field "Attr-length", Attribute 35 (Flags 0xe0, Length 1024), Data [f0230400]". NLRIs: [IPv6 Unicast] 2402:2de0::/32
Both sessions have remained up and appear normal.
-----Original Message----- From: Jay Hanke via mice-discuss <mice-discuss@lists.micemn.net> Sent: October 7, 2025 15:34 To: Jonathan Stewart <jonathan@les.net> Cc: mice-discuss@lists.micemn.net Subject: Re: v6 on rs1/rs2 fubar?
Confirmed at FLIX/CIX-ATL/PIT-IX so far.
All juniper but not all junipers affected
If someone affected can you send me a trace it would be helpful.
On Tue, Oct 7, 2025 at 3:32 PM Jonathan Stewart <jonathan@les.net> wrote:
I've seen BGP sessions resetting this afternoon on Juniper.
What more do we know from the global community?
Jonathan Stewart Network Engineer LES.NET - AS18451 Desk: 1-204-666-6191 Mobile: 1-204-990-2120 130 Portage Avenue E Winnipeg, MB R3C 0A1 CANADA
On Tue, 2025-10-07 3:11 p.m., Jay Hanke via mice-discuss wrote:
Looks like it might be a worldwide issue.
Running Juniper?
On Tue, Oct 7, 2025 at 3:07 PM Andrew Hoyos <hoyosa@gmail.com>
wrote:
Hi folks,
We dropped v6 to rs1/rs2. Spot checked a few other members we manage, and same deal. Any work taking place on route servers at the moment?
Andrew Hoyos hoyosa@gmail.com
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