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A port in a 4-port LACP trunk on 3400CL is stuck in "error" state

 
FallenTree
Occasional Contributor

A port in a 4-port LACP trunk on 3400CL is stuck in "error" state

Hi,

I am having a weird issue, one port in my 4-port LACP trunk between two 3400CL-48G switches seems to stuck in "error" state.  as shown below

switch2# show lacp

LACP

PORT LACP TRUNK PORT LACP LACP
NUMB ENABLED GROUP STATUS PARTNER STATUS
---- ------- ------- ------- ------- -------
45 Active Trk1 Up Yes Success
46 Active Trk1 Up Yes Success
47 Active Trk1 Up Yes Success
48 Active Trk1 Blocked No Failure

and on one of the switch it has a syslog line like this: 

LACP : Port 29 is blocked - error condition

 

I tried unplug/replug the cable, the error persist. I also tried to switch the cabel with another one in the group, funny the problem does move with the port.  I havn't replaced the cable yet, but I couldn't find anything wrong with the cable,and  it is a really solid and short one as well , no sign of trouble.

Any one have ideas?

4 REPLIES
parnassus
Honored Contributor

Re: A port in a 4-port LACP trunk on 3400CL is stuck in "error" state

What's about the other LACP Trunk's end?

I mean the other HP 3400cl-48G (J4906A) switch your Port Trunk is connected to...can you check its LACP and involved ports statuses too via CLI with the show lacp and show interfaces commands?

What Fault, Test and Port LEDs report on both switches for all LACP involved ports?

Ports' Mode Settings were left (show interface config) to default (Auto) or what?

Can you provide the exact output of the show lacp command once executed on both ends?

Keep in mind that a blocked port member of a LACP aggregated group means basically that "Spanning tree has blocked the port. (The port is not in LACP Standby mode) This may be due to a (brief) trunk negotiation or a configuration error such as differing port speeds on the same link or trying to connect the switch to more trunks than it can support."

Have you checked about Duplex Mismatches eventually (Full Duplex is mandatory with LACP)?

Is the patch cable you moved (Cat.5E/Cat.6) certified?

What firmware versions your switches are actually running (the latest M.10.104 was released on November 2015)?

FallenTree
Occasional Contributor

Re: A port in a 4-port LACP trunk on 3400CL is stuck in "error" state

Thanks for the replying , and sorry for the delay.

Here's  switch A , port 27,28,29,30 is in lacp group. 

 

show lacp

LACP

PORT LACP TRUNK PORT LACP LACP
NUMB ENABLED GROUP STATUS PARTNER STATUS
---- ------- ------- ------- ------- -------
1 Passive 1 Up No Success
2 Passive 2 Up No Success
3 Passive 3 Down No Success
4 Passive 4 Down No Success
5 Passive 5 Down No Success
6 Passive 6 Down No Success
7 Passive 7 Down No Success
8 Passive 8 Down No Success
9 Passive Dyn1 Up Yes Success
10 Passive Dyn1 Up Yes Success
11 Passive Dyn1 Up Yes Success
12 Passive Dyn1 Up Yes Success
13 Passive 13 Down No Success
14 Passive 14 Down No Success
15 Passive 15 Down No Success
16 Passive 16 Down No Success
17 Passive 17 Up No Success
18 Passive 18 Up No Success
19 Passive 19 Up No Success
20 Passive 20 Up No Success
21 Passive 21 Up No Success
22 Passive 22 Up No Success
23 Passive 23 Up No Success
24 Passive 24 Up No Success
25 Passive 25 Up No Success
26 Passive 26 Up No Success
27 Active Trk2 Up Yes Success
28 Active Trk2 Up Yes Success
29 Active Trk2 Blocked No Failure
30 Active Trk2 Up Yes Success
31 Passive Dyn2 Up Yes Success
32 Passive Dyn2 Up Yes Success
33 Active Trk1 Up Yes Success
34 Active Trk1 Up Yes Success
35 Active Trk1 Up Yes Success
36 Active Trk1 Up Yes Success
37 Passive 37 Down No Success
38 Passive 38 Down No Success
39 Passive 39 Down No Success
40 Passive 40 Down No Success
41 Passive 41 Down No Success
42 Passive 42 Down No Success
43 Passive 43 Down No Success
44 Passive 44 Up No Success

fmt2-1200-7-52# show interfaces 29

Status and Counters - Port Counters for port 29

Name :
Link Status : Up
Totals (Since boot or last clear) :
Bytes Rx : 1,496,049,071 Bytes Tx : 4,148,440,330
Unicast Rx : 2,183,286,539 Unicast Tx : 465,685,979
Bcast/Mcast Rx : 12,632,715 Bcast/Mcast Tx : 17,962,898
Errors (Since boot or last clear) :
FCS Rx : 0 Drops Rx : 0
Alignment Rx : 0 Collisions Tx : 0
Runts Rx : 0 Late Colln Tx : 0
Giants Rx : 0 Excessive Colln : 0
Total Rx Errors : 0 Deferred Tx : 0
Rates (5 minute weighted average) :
Total Rx (bps) : 0 Total Tx (bps) : 1609880
Unicast Rx (Pkts/sec) : 0 Unicast Tx (Pkts/sec) : 0
B/Mcast Rx (Pkts/sec) : 0 B/Mcast Tx (Pkts/sec) : 0
Utilization Rx : 0 % Utilization Tx : 00.16 %

 

show interface config 

27-Trk2 100/1000T | Yes Auto Disable Auto
28-Trk2 100/1000T | Yes Auto Disable Auto
29-Trk2 100/1000T | Yes Auto Disable Auto
30-Trk2 100/1000T | Yes Auto Disable Auto

 

fault finder find no issue,  Port LED is up on link , and down on "Activity"

on  switchB, 45,46,47,48 is connected.

show interface config

45-Trk1 100/1000T | Yes Auto Disable Auto
46-Trk1 100/1000T | Yes Auto Disable Auto
47-Trk1 100/1000T | Yes Auto Disable Auto
48-Trk1 100/1000T | Yes Auto Disable Auto

show lacp

LACP

PORT LACP TRUNK PORT LACP LACP
NUMB ENABLED GROUP STATUS PARTNER STATUS
---- ------- ------- ------- ------- -------
1 Passive 1 Down No Success
2 Passive 2 Down No Success
3 Passive 3 Down No Success
4 Passive 4 Down No Success
5 Passive 5 Down No Success
6 Passive 6 Down No Success
7 Passive 7 Down No Success
8 Passive 8 Down No Success
9 Passive 9 Down No Success
10 Passive 10 Down No Success
11 Passive 11 Down No Success
12 Passive 12 Down No Success
13 Passive 13 Down No Success
14 Passive 14 Down No Success
15 Passive 15 Down No Success
16 Passive 16 Down No Success
17 Passive 17 Down No Success
18 Passive 18 Down No Success
19 Passive 19 Down No Success
20 Passive 20 Down No Success
21 Passive 21 Down No Success
22 Passive 22 Down No Success
23 Passive 23 Down No Success
24 Passive 24 Down No Success
25 Passive 25 Down No Success
26 Passive 26 Down No Success
27 Passive 27 Down No Success
28 Passive 28 Down No Success
29 Passive 29 Down No Success
30 Passive 30 Down No Success
31 Passive 31 Down No Success
32 Passive 32 Down No Success
33 Active Trk3 Up Yes Success
34 Active Trk3 Up Yes Success
35 Active Trk3 Up Yes Success
36 Active Trk3 Up Yes Success
37 Active Trk2 Up Yes Success
38 Active Trk2 Up Yes Success
39 Active Trk2 Up Yes Success
40 Active Trk2 Up Yes Success
41 Passive 41 Up No Success
42 Passive 42 Up No Success
43 Passive 43 Up No Success
44 Passive 44 Up No Success
45 Active Trk1 Up Yes Success
46 Active Trk1 Up Yes Success
47 Active Trk1 Up Yes Success
48 Active Trk1 Blocked No Failure

show interfaces 48

Status and Counters - Port Counters for port 48

Name : link-1200-7-52
Link Status : Up
Totals (Since boot or last clear) :
Bytes Rx : 3,587,742,887 Bytes Tx : 3,507,785,627
Unicast Rx : 1,792,573,360 Unicast Tx : 2,314,537,770
Bcast/Mcast Rx : 3,118,030 Bcast/Mcast Tx : 20,755,711
Errors (Since boot or last clear) :
FCS Rx : 167,953 Drops Rx : 0
Alignment Rx : 0 Collisions Tx : 0
Runts Rx : 0 Late Colln Tx : 0
Giants Rx : 0 Excessive Colln : 0
Total Rx Errors : 178,556 Deferred Tx : 0
Rates (5 minute weighted average) :
Total Rx (bps) : 0 Total Tx (bps) : 1727384
Unicast Rx (Pkts/sec) : 0 Unicast Tx (Pkts/sec) : 0
B/Mcast Rx (Pkts/sec) : 0 B/Mcast Tx (Pkts/sec) : 0
Utilization Rx : 0 % Utilization Tx : 00.17 %

.

The thing is, there is no config error as far as I can tell.  and the cable looks great, i even switched port on switch A. Havn't try switch port on switch B yet.

 

 

 

parnassus
Honored Contributor

Re: A port in a 4-port LACP trunk on 3400CL is stuck in "error" state

Well, it's not mandatory (nor there is a written rule about that) to link port by port between two LAGs in a sequential way as:

Switch A Trunk 2 | Port 27 <----> Port 45 | Trunk 1 Switch B
Switch A Trunk 2 | Port 28 <----> Port 46 | Trunk 1 Switch B
Switch A Trunk 2 | Port 29 <----> Port 47 | Trunk 1 Switch B
Switch A Trunk 2 | Port 30 <----> Port 48 | Trunk 1 Switch B

but, doing the cabling that way, troubleshooting LAGs issue could be a little bit more easy especially when you are not sure 100% about cabling quality and end-to-end connection's paths.

Said so...you wrote the issue follows the port...as far as I can understand that means that if you exchange a cable within one LAG with another one (either on the LAG on Switch A or on the LAG on Switch B) the issue follows your move...so the problem should be the cable, not the port.

Or did you mean that the issue is, no matter how you move the LAGs patching cables, always on Port 29 of Switch A and Port 48 on Switch B?

Have you double checked the cabling? Are your Switch firmwares up to date? Did you tried - if that is possible - to reset LAGs/Port Trunking for Trunk 2 (Switch A) and Trunk 1 (Switch B) and recreate them ex-novo from scratch (connecting cables one by one after LAGs are defined, so you can diagnose each physical link during its setup <-- optionally resetting/clearing ports diagonstic counters would help to see what is happening since beginning of the new LACP Trunk first operation).

Are you 100% sure that Ports 27, 28, 29 and 30 of Switch A are directly connected (straight to) to Ports 45, 46, 47 and 48 of Switch B (eventually also connected in a different order as it seems to be now)?

FallenTree
Occasional Contributor

Re: A port in a 4-port LACP trunk on 3400CL is stuck in "error" state

Hi,

Thanks for replying, after some investgation, I concluded the switch B port 48 is having physical issues.  I moved away from that port and all is well.  However I didn't do further testing on that port.

Thanks.