Hi Ondrej,
I tested it with my IPv6 Peering, with no routes announced the Peering
established correctly (from my point of view):
[..]
Local capabilities
Multiprotocol
AF announced: ipv6 flow6
Route refresh
Graceful restart
4-octet AS numbers
ADD-PATH
RX:
TX: ipv6
Enhanced refresh
Long-lived graceful restart
Neighbor capabilities
Multiprotocol
AF announced: ipv6
Route refresh
Graceful restart
Restart time: 120
AF supported: ipv6
AF preserved:
4-octet AS numbers
ADD-PATH
RX: ipv6
TX: ipv6
[..]
But as soon as routes get announced the Peering went down:
B_TEST_v6 BGP --- start 14:19:48.911 Active Received:
Invalid network field
BGP state: Active
Neighbor address: 2a05:XXX:XXX:X
Neighbor AS: 65000
Local AS: 65000
Connect delay: 0.214/5
Last error: Received: Invalid network field
Channel ipv6
State: DOWN
Table: T_TEST_v6
Preference: 100
Input filter: (unnamed)
Output filter: (unnamed)
IGP IPv6 table: master6
Channel flow6
State: DOWN
Table: TF_TEST_v6
Preference: 100
Input filter: ACCEPT
Output filter: ACCEPT
And the Cisco side went down with:
%ROUTING-BGP-3-MALFORM_UPDATE : Malformed UPDATE message received from neighbor
<IPV6 Neighbor IP> (VRF: TEST) - message length 215 bytes, error flags
0x00000008, action
+taken "Reset". Error details: "Error 0x00000008, Field "MP_REACH-NLRI",
Attribute 14 (Flags 0x00, Length 0), Data [53]". NLRIs: [IPv4 Unicast]
I send you the complete pcap per PM, and also the complete show command from
above.
Regards,
tim
On Thu, Jan 11, 2024 at 05:42:02PM +0100, Ondrej Zajicek wrote:
> On Tue, Jan 09, 2024 at 05:10:49PM +0100, Tim Weippert via Bird-users wrote:
> >
> > Hi All,
> >
> > i try to activate "add paths tx;" from my Bird2 (2.0.12) Routeserver to a
> > Cisco IOS-XR Systems (7.9.2), after i add
> > the config on Bird side, the IOS-XR shuts down the peering:
> >
> > %ROUTING-BGP-3-MALFORM_UPDATE : Malformed UPDATE message received from
> > neighbor <IPV6-RR> (VRF: INTERNET) - message length 160 bytes, error flags
> > 0x00000008, action taken "Reset". Error details: "Error 0x00000008, Field
> > "MP_REACH-NLRI", Attribute 14 (Flags 0x00, Length 0), Data [6d]". NLRIs:
> > [IPv4 Unicast]
> > %ROUTING-BGP-5-ADJCHANGE : neighbor <IPV6-RR> Down - BGP Notification sent,
> > illegal network (VRF: INTERNET) (AS: 65000)
> > ...
> >
> > Does this means, that bird doesn't add the path-id as expected?
> > Is there some known caveouts around?
>
> Hi
>
> Well, it should work as expected.
>
> Can you establish a session without sending anything (to not trigger the bug)
> and send the output of 'show protocols all'?
>
> Or perhaps make a tcpdump/pcap of such session with updates?
>
> --
> Elen sila lumenn' omentielvo
>
> Ondrej 'Santiago' Zajicek (email: santi...@crfreenet.org)
> "To err is human -- to blame it on a computer is even more so."
--
Tim Weippert
http://weiti.org - we...@weiti.org
GPG Fingerprint - E704 7303 6FF0 8393 ADB1 398E 67F2 94AE 5995 7DD8
