LINK AGG secondary not operating

[slaskaridis]

hi
I have several linkaggs between the CORE virtual chassis 1 and 2 and the access switches without problem

A specific linkagg is not working properly. The primary port on VC1 is working but the secondary on VC2 is not.

Below is the show link agg 21 cmd:


IT_CORE: show linkagg agg 21

Dynamic Aggregate
SNMP Id : 40000021,
Aggregate Number : 21,
SNMP Descriptor : Dynamic Aggregate Number 21 ref 40000021 size 2,
Name : ,
Admin State : ENABLED,
Operational State : UP,
Aggregate Size : 2,
Number of Selected Ports : 1,
Number of Reserved Ports : 1,
Number of Attached Ports : 1,
Primary Port : 1/3/21,
Port Selection Hash : Source Destination Ip,
Wait To Restore Time : 0 Minutes
LACP
MACAddress : [2c:fa:a2:df:da:c0],
Actor System Id : [00:00:00:00:00:00],
Actor System Priority : 0,
Actor Admin Key : 21,
Actor Oper Key : 21,
Partner System Id : [00:00:00:00:00:00],
Partner System Priority : 0,
Partner Admin Key : 0,
Partner Oper Key : 1


Below is the two ports of the linkagg 1/3/21 and 2/3/21

IT_CORE: show linkagg port 1/3/21

Dynamic Aggregable Port
SNMP Id : 3021,
Chassis/Slot/Port : 1/3/21,
Administrative State : ENABLED,
Operational State : UP,
Port State : ATTACHED,
Link State : UP,
Selected Agg Number : 21,
Port position in the aggregate: 0,
Primary port : YES
LACP
Actor System Priority : 0,
Actor System Id : [2c:fa:a2:bf:0e:72],
Actor Admin Key : 21,
Actor Oper Key : 21,
Partner Admin System Priority : 0,
Partner Oper System Priority : 0,
Partner Admin System Id : [00:00:00:00:00:00],
Partner Oper System Id : [2c:fa:a2:b6:80:fc],
Partner Admin Key : 0,
Partner Oper Key : 1,
Selected Agg Id : 21,
Attached Agg Id : 21,
Actor Port : 276,
Actor Port Priority : 0,
Partner Admin Port : 0,
Partner Oper Port : 1055,
Partner Admin Port Priority : 0,
Partner Oper Port Priority : 0,
Actor Admin State : act1.tim0.agg1.syn0.col0.dis0.def1.exp0,
Actor Oper State : act1.tim0.agg1.syn1.col1.dis1.def0.exp0,
Partner Admin State : act0.tim0.agg1.syn0.col1.dis1.def1.exp0,
Partner Oper State : act1.tim1.agg1.syn1.col1.dis1.def0.exp0




IT_CORE: show linkagg port 2/3/21

Dynamic Aggregable Port
SNMP Id : 103021,
Chassis/Slot/Port : 2/3/21,
Administrative State : ENABLED,
Operational State : DOWN,
Port State : CONFIGURED,
Link State : UP,
Selected Agg Number : NONE,
Primary port : UNKNOWN
LACP
Actor System Priority : 0,
Actor System Id : [2c:fa:a2:bf:0e:72],
Actor Admin Key : 21,
Actor Oper Key : 21,
Partner Admin System Priority : 0,
Partner Oper System Priority : 0,
Partner Admin System Id : [00:00:00:00:00:00],
Partner Oper System Id : [00:00:00:00:00:00],
Partner Admin Key : 0,
Partner Oper Key : 0,
Selected Agg Id : 0,
Attached Agg Id : 0,
Actor Port : 131348,
Actor Port Priority : 0,
Partner Admin Port : 0,
Partner Oper Port : 0,
Partner Admin Port Priority : 0,
Partner Oper Port Priority : 0,
Actor Admin State : act1.tim0.agg1.syn0.col0.dis0.def1.exp0,
Actor Oper State : act1.tim0.agg1.syn0.col0.dis0.def1.exp0,
Partner Admin State : act0.tim0.agg1.syn0.col1.dis1.def1.exp0,
Partner Oper State : act0.tim0.agg1.syn0.col1.dis1.def1.exp0


Below is the DDM for those 2 ports. Seems ok -db

IT_CORE: show interfaces ddm actual
Chas/
Slot/Port Temp (C) Voltage (V) Tx Bias (mA) Output (dBm) Input (dBm)
----------+----------+------------+--------------+--------------+-------------

1/3/21 37.0 3.306 33.846 -1.910 -3.913

2/3/21 35.0 3.335 34.592 -2.379 -4.412


Below is the config of the access switch. It is a stack of 6 switches X models (10G uplinks):
! Link Aggregate :
lacp linkagg 1 size 2 admin state enable
lacp linkagg 1 name "linkagg8"
lacp linkagg 1 actor admin key 1
lacp agg 1/50 actor admin key 1
lacp agg 6/26 actor admin key 1

The secondary port of VC2 , 2/3/21 is not operational.
please advice.

[Gleylancer]

Please post the configuration of the core switch.

[slaskaridis]

FORUM IT CORE_1_link aggs vlan tags vlan18 ok .txt

[Gleylancer]

There is most likely a physical problem on the non working link. Take a look at "show interface" from both sides and post the result.

[slaskaridis]

i connected the primary link cables to the secondary link ports, but the link didn t came up.
so i don t think anymore that it is a physical issue.
could this be a bug on both ends?

[Gleylancer]

Please post the show interface results of both sides.

[slaskaridis]

show interfaces on both CORES

IT_CORE: show interfaces 1/3/21
Chassis/Slot/Port 1/3/21 :
Operational Status : up,
Last Time Link Changed : Wed Jun 15 01:58:33 2016,
Number of Status Change: 57,
Type : Ethernet,
SFP/XFP : SFP_PLUS_LR,
EPP : Disabled,
Link-Quality : N/A,
MAC address : 2c:fa:a2:df:da:c0,
BandWidth (Megabits) : 10000, Duplex : Full,
Autonegotiation : 0 [ ],
Long Frame Size(Bytes) : 9216,
Inter Frame Gap(Bytes) : 12,
Rx :
Bytes Received : 34414056, Unicast Frames : 38294,
Broadcast Frames: 91297, M-cast Frames : 35868,
UnderSize Frames: 0, OverSize Frames: 0,
Lost Frames : 0, Error Frames : 0,
CRC Error Frames: 0, Alignments Err : 0,
Tx :
Bytes Xmitted : 773649602, Unicast Frames : 582834,
Broadcast Frames: 1208242, M-cast Frames : 5001616,
UnderSize Frames: 0, OverSize Frames: 0,
Lost Frames : 0, Collided Frames: 0,
Error Frames : 0

IT_CORE: show interfaces 2/3/21
Chassis/Slot/Port 2/3/21 :
Operational Status : up,
Last Time Link Changed : Wed Jun 15 01:49:35 2016,
Number of Status Change: 69,
Type : Ethernet,
SFP/XFP : SFP_PLUS_LR,
EPP : Disabled,
Link-Quality : N/A,
MAC address : 2c:fa:a2:df:e0:00,
BandWidth (Megabits) : 10000, Duplex : Full,
Autonegotiation : 0 [ ],
Long Frame Size(Bytes) : 9216,
Inter Frame Gap(Bytes) : 12,
Rx :
Bytes Received : 15537271, Unicast Frames : 4,
Broadcast Frames: 36, M-cast Frames : 128959,
UnderSize Frames: 0, OverSize Frames: 0,
Lost Frames : 0, Error Frames : 1,
CRC Error Frames: 0, Alignments Err : 0,
Tx :
Bytes Xmitted : 4866816, Unicast Frames : 0,
Broadcast Frames: 0, M-cast Frames : 60821,
UnderSize Frames: 0, OverSize Frames: 0,
Lost Frames : 0, Collided Frames: 0,
Error Frames : 0

IT_CORE:

[slaskaridis]

on Access switch stack

> show interfaces 1/50
Slot/Port 1/50 :
Operational Status : up,
Last Time Link Changed : TUE JAN 08 03:15:39 ,
Number of Status Change: 39,
Type : Ethernet,
SFP/SFP+/XFP : SFP+_LR,
MAC address : 2c:fa:a2:b6:81:2f,
BandWidth (Megabits) : 10000, Duplex : Full,
Autonegotiation : 0 [ ],
Long Frame Size(Bytes) : 9216,
Rx :
Bytes Received : 773904872, Unicast Frames : 583476,
Broadcast Frames: 1208675, M-cast Frames : 5002860,
UnderSize Frames: 0, OverSize Frames: 0,
Lost Frames : 0, Error Frames : 1,
CRC Error Frames: 1, Alignments Err : 0,
Tx :
Bytes Xmitted : 34819505, Unicast Frames : 39087,
Broadcast Frames: 91323, M-cast Frames : 36066,
UnderSize Frames: 0, OverSize Frames: 0,
Lost Frames : 0, Collided Frames: 0,
Error Frames : 0


-> show interfaces 6/26
Slot/Port 6/26 :
Operational Status : up,
Last Time Link Changed : TUE JAN 08 03:06:32 ,
Number of Status Change: 55,
Type : Ethernet,
SFP/SFP+/XFP : SFP+_LR,
MAC address : 2c:fa:a2:ba:a1:4f,
BandWidth (Megabits) : 10000, Duplex : Full,
Autonegotiation : 0 [ ],
Long Frame Size(Bytes) : 9216,
Rx :
Bytes Received : 4912084, Unicast Frames : 30,
Broadcast Frames: 77, M-cast Frames : 61142,
UnderSize Frames: 0, OverSize Frames: 0,
Lost Frames : 0, Error Frames : 0,
CRC Error Frames: 0, Alignments Err : 0,
Tx :
Bytes Xmitted : 15511829, Unicast Frames : 5,
Broadcast Frames: 38, M-cast Frames : 128775,
UnderSize Frames: 0, OverSize Frames: 0,
Lost Frames : 0, Collided Frames: 0,
Error Frames : 0

[Gleylancer]

From the configuration and the interfaces I don't see any problem here. There is a possibility that the linkagg configuration does not match the actual physical configuration, that would make the link appear up on both sides, but one of the links is not configured to work in the lacp. You can verify this by exchanging both physical links on the core with each other. If after exchanging the other link is down, you know that the problem is -not- located on the core switch, but either with the cabling or the access switch. You can do the same on the other side afterwards. If the problem moves here too, there's an issue with the cabling.

[slaskaridis]

Thank you very much Gleylancer.
Since I am not on site, I will try this with the colleague and let you know asap.
Thanks again for checking the configs.