[c-nsp] [j-nsp] Stange issue on 100 Gbs interconnection Juniper - Cisco

[james list]

Hi
I have a couple of points to ask related to your idea:
- why physical interface flaps in DC1 if it is related to lacp ?
- why the same setup in DC2 do not report issues ?

NEXUS01# sh logging | in  Initia | last 15
2024 Jan 17 22:37:49 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Jan 18 23:54:25 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Jan 19 00:58:13 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Jan 19 07:15:04 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Jan 22 16:03:13 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Jan 25 21:32:29 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Jan 26 18:41:12 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Jan 28 05:07:20 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Jan 29 04:06:52 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Jan 30 03:09:44 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Feb  5 18:13:20 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Feb  6 02:17:25 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Feb  6 22:00:24 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Feb  9 09:29:36 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Feb  9 16:39:36 NEXUS01 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)

Il giorno dom 11 feb 2024 alle ore 14:36 Saku Ytti <saku at ytti.fi> ha
scritto:

> On Sun, 11 Feb 2024 at 15:24, james list <jameslist72 at gmail.com> wrote:
>
> > While on Juniper when the issue happens I always see:
> >
> > show log messages | last 440 | match LACPD_TIMEOUT
> > Jan 25 21:32:27.948 2024  MX1 lacpd[31632]: LACPD_TIMEOUT: et-0/1/5:
> lacp current while timer expired current Receive State: CURRENT
> ....
> > Feb  9 16:39:35.813 2024  MX1 lacpd[31632]: LACPD_TIMEOUT: et-0/1/5:
> lacp current while timer expired current Receive State: CURRENT
>
> Ok so problem always starts by Juniper seeing 3seconds without LACP
> PDU, i.e. missing 3 consecutive LACP PDU. It would be good to ping
> while this problem is happening, to see if ping stops at 3s before the
> syslog lines, or at the same time as syslog lines.
> If ping stops 3s before, it's link problem from cisco to juniper.
> If ping stops at syslog time (my guess), it's software problem.
>
> There is unfortunately log of bug surface here, both on inject and on
> punt path. You could be hitting PR1541056 on the Juniper end. You
> could test for this by removing distributed LACP handling with 'set
> routing-options ppm no-delegate-processing'
> You could also do packet capture for LACP on both ends, to try to see
> if LACP was sent by Cisco and received by capture, but not by system.
>
>
> --
>   ++ytti
>