Hi
there are no errors on both interfaces (Cisco and Juniper).
here following logs of one event on both side, config and LACP stats.
LOGS of one event time 16:39:
CISCO
2024 Feb 9 16:39:36 NEXUS1 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN:
Interface port-channel101 is down (No operational members)
2024 Feb 9 16:39:36 NEXUS1 %ETHPORT-5-IF_DOWN_PARENT_DOWN: Interface
port-channel101.2303 is down (Parent interface is down)
2024 Feb 9 16:39:36 NEXUS1 %BGP-5-ADJCHANGE: bgp- [xxx] (xxx) neighbor
172.16.6.17 Down - sent: other configuration change
2024 Feb 9 16:39:36 NEXUS1 %ETH_PORT_CHANNEL-5-FOP_CHANGED:
port-channel101: first operational port changed from Ethernet1/44 to none
2024 Feb 9 16:39:36 NEXUS1 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel101:
Ethernet1/44 is down
2024 Feb 9 16:39:36 NEXUS1 %ETHPORT-5-IF_BANDWIDTH_CHANGE: Interface
port-channel101,bandwidth changed to 100000 Kbit
2024 Feb 9 16:39:36 NEXUS1 %ETHPORT-5-IF_DOWN_INITIALIZING: Interface
Ethernet1/44 is down (Initializing)
2024 Feb 9 16:39:36 NEXUS1 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN:
Interface port-channel101 is down (No operational members)
2024 Feb 9 16:39:36 NEXUS1 %ETHPORT-5-SPEED: Interface port-channel101,
operational speed changed to 100 Gbps
2024 Feb 9 16:39:36 NEXUS1 %ETHPORT-5-IF_DUPLEX: Interface
port-channel101, operational duplex mode changed to Full
2024 Feb 9 16:39:36 NEXUS1 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface
port-channel101, operational Receive Flow Control state changed to off
2024 Feb 9 16:39:36 NEXUS1 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface
port-channel101, operational Transmit Flow Control state changed to off
2024 Feb 9 16:39:39 NEXUS1 %ETH_PORT_CHANNEL-5-PORT_UP: port-channel101:
Ethernet1/44 is up
2024 Feb 9 16:39:39 NEXUS1 %ETH_PORT_CHANNEL-5-FOP_CHANGED:
port-channel101: first operational port changed from none to Ethernet1/44
2024 Feb 9 16:39:39 NEXUS1 %ETHPORT-5-IF_BANDWIDTH_CHANGE: Interface
port-channel101,bandwidth changed to 100000000 Kbit
2024 Feb 9 16:39:39 NEXUS1 %ETHPORT-5-IF_UP: Interface Ethernet1/44 is up
in Layer3
2024 Feb 9 16:39:39 NEXUS1 %ETHPORT-5-IF_UP: Interface port-channel101 is
up in Layer3
2024 Feb 9 16:39:39 NEXUS1 %ETHPORT-5-IF_UP: Interface
port-channel101.2303 is up in Layer3
2024 Feb 9 16:39:43 NEXUS1 %BGP-5-ADJCHANGE: bgp- [xxx] (xxx) neighbor
172.16.6.17 Up
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
Feb 9 16:39:35.813 2024 MX1 lacpd[31632]: LACP_INTF_DOWN: ae49: Interface
marked down due to lacp timeout on member et-0/1/5
Feb 9 16:39:35.819 2024 MX1 kernel: lag_bundlestate_ifd_change: bundle
ae49: bundle IFD minimum bandwidth or minimum links not met, Bandwidth
(Current : Required) 0 : 100000000000 Number of links (Current : Required)
0 : 1
Feb 9 16:39:35.815 2024 MX1 lacpd[31632]: LACP_INTF_MUX_STATE_CHANGED:
ae49: et-0/1/5: Lacp state changed from COLLECTING_DISTRIBUTING to
ATTACHED, actor port state : |EXP|-|-|-|IN_SYNC|AGG|SHORT|ACT|, partner
port state : |-|-|DIS|COL|OUT_OF_SYNC|AGG|SHORT|ACT|
Feb 9 16:39:35.869 2024 MX1 rpd[31866]: bgp_ifachange_group:10697:
NOTIFICATION sent to 172.16.6.18 (External AS xxx): code 6 (Cease) subcode
6 (Other Configuration Change), Reason: Interface change for the peer-group
Feb 9 16:39:35.909 2024 MX1 mib2d[31909]: SNMP_TRAP_LINK_DOWN: ifIndex
684, ifAdminStatus up(1), ifOperStatus down(2), ifName ae49
Feb 9 16:39:36.083 2024 MX1 lacpd[31632]: LACP_INTF_MUX_STATE_CHANGED:
ae49: et-0/1/5: Lacp state changed from ATTACHED to
COLLECTING_DISTRIBUTING, actor port state :
|-|-|DIS|COL|IN_SYNC|AGG|SHORT|ACT|, partner port state :
|-|-|DIS|COL|IN_SYNC|AGG|SHORT|ACT|
Feb 9 16:39:36.089 2024 MX1 kernel: lag_bundlestate_ifd_change: bundle
ae49 is now Up. uplinks 1 >= min_links 1
Feb 9 16:39:36.089 2024 MX1 kernel: lag_bundlestate_ifd_change: bundle
ae49: bundle IFD minimum bandwidth or minimum links not met, Bandwidth
(Current : Required) 0 : 100000000000 Number of links (Current : Required)
0 : 1
Feb 9 16:39:36.085 2024 MX1 lacpd[31632]: LACP_INTF_MUX_STATE_CHANGED:
ae49: et-0/1/5: Lacp state changed from COLLECTING_DISTRIBUTING to
ATTACHED, actor port state : |-|-|-|-|IN_SYNC|AGG|SHORT|ACT|, partner port
state : |-|-|-|-|OUT_OF_SYNC|AGG|SHORT|ACT|
Feb 9 16:39:39.095 2024 MX1 lacpd[31632]: LACP_INTF_MUX_STATE_CHANGED:
ae49: et-0/1/5: Lacp state changed from ATTACHED to
COLLECTING_DISTRIBUTING, actor port state :
|-|-|DIS|COL|IN_SYNC|AGG|SHORT|ACT|, partner port state :
|-|-|-|-|IN_SYNC|AGG|SHORT|ACT|
Feb 9 16:39:39.101 2024 MX1 kernel: lag_bundlestate_ifd_change: bundle
ae49 is now Up. uplinks 1 >= min_links 1
Feb 9 16:39:39.109 2024 MX1 mib2d[31909]: SNMP_TRAP_LINK_UP: ifIndex 684,
ifAdminStatus up(1), ifOperStatus up(1), ifName ae49
Feb 9 16:39:41.190 2024 MX1 rpd[31866]: bgp_recv: read from peer
172.16.6.18 (External AS xxx) failed: Unknown error: 48110976
CONFIG:
CISCO
NEXUS1# sh run int port-channel 101
interface port-channel101
description <[To MX1|Et-0/1/5]>
mtu 9216
no ip redirects
NEXUS01# sh run int port-channel 101.2303
interface port-channel101.2303
description <[To MX1|Et-0/1/5]>
mtu 9216
encapsulation dot1q 2303
vrf member SIA
bfd ipv4 interval 250 min_rx 250 multiplier 3
no ip redirects
ip address 172.16.6.18/30
no shutdown
JUNIPER
MX1> show configuration interfaces ae49
description "link to NEXUS01";
flexible-vlan-tagging;
mtu 9192;
encapsulation flexible-ethernet-services;
aggregated-ether-options {
lacp {
active;
periodic fast;
}
}
unit 2303 {
vlan-id 2303;
family inet {
mtu 1500;
address 172.16.6.17/30;
}
}
LACP counters:
CISCO
NEXUS01# sh lacp counters
NOTE: Clear lacp counters to get accurate statistics
------------------------------------------------------------------------------
LACPDUs Markers/Resp
LACPDUs
Port Sent Recv Recv Sent Pkts
Err
------------------------------------------------------------------------------
port-channel101
Ethernet1/44 6123011 6118981 0 0
0
NEXUS1# sh lacp interface eth1/44
Interface Ethernet1/44 is up
Channel group is 101 port channel is Po101
PDUs sent: 6123014
PDUs rcvd: 6118984
Markers sent: 0
Markers rcvd: 0
Marker response sent: 0
Marker response rcvd: 0
Unknown packets rcvd: 0
Illegal packets rcvd: 0
Lag Id: [ [(7f, c4-9-b7-64-30-38, 32, 7f, 18), (8000, b0-8b-cf-83-49-5b,
64, 8000, 1ad)] ]
Operational as aggregated link since Fri Feb 9 16:39:39 2024
Local Port: Eth1/44 MAC Address= b0-8b-cf-83-49-5b
System Identifier=0x8000, Port Identifier=0x8000,0x1ad
Operational key=100
LACP_Activity=active
LACP_Timeout=Short Timeout (1s)
Synchronization=IN_SYNC
Collecting=true
Distributing=true
Partner information refresh timeout=Short Timeout (3s)
Actor Admin State=63
Actor Oper State=63
Neighbor: 0x18
MAC Address= c4-9-b7-64-30-38
System Identifier=0x7f, Port Identifier=0x7f,0x18
Operational key=50
LACP_Activity=active
LACP_Timeout=short Timeout (1s)
Synchronization=IN_SYNC
Collecting=true
Distributing=true
Partner Admin State=63
Partner Oper State=63
Aggregate or Individual(True=1)= 1
JUNIPER
MX1> show lacp interfaces ae49 extensive
Aggregated interface: ae49
LACP state: Role Exp Def Dist Col Syn Aggr Timeout
Activity
et-0/1/5 Actor No No Yes Yes Yes Yes Fast
Active
et-0/1/5 Partner No No Yes Yes Yes Yes Fast
Active
LACP protocol: Receive State Transmit State Mux State
et-0/1/5 Current Fast periodic Collecting
distributing
LACP info: Role System System Port
Port Port
priority identifier priority
number key
et-0/1/5 Actor 127 c4:09:b7:64:30:38 127
24 50
et-0/1/5 Partner 32768 b0:8b:cf:83:49:5b 32768
429 100
Il giorno dom 11 feb 2024 alle ore 13:07 Gert Doering <g...@greenie.muc.de>
ha scritto:
> HI,
>
> On Sun, Feb 11, 2024 at 12:50:32PM +0100, james list wrote:
> > 2024 Feb 9 16:39:36 NEXUS1 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN:
> > Interface port-channel101 is down (No operational members)
>
> So there is no *BGP* problem here, but a lower layer issue.
>
> Let me repeat that part about "error counters on the interface"...
>
> gert
> --
> "If was one thing all people took for granted, was conviction that if you
> feed honest figures into a computer, honest figures come out. Never
> doubted
> it myself till I met a computer with a sense of humor."
> Robert A. Heinlein, The Moon is a Harsh
> Mistress
>
> Gert Doering - Munich, Germany
> g...@greenie.muc.de
>
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