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LACP on ios 15.2.4E10 ?

Eric32500
Level 1
Level 1

Hello

I'm working with a 3750x-48PS switch currently running IOS 15.0(2)SE11.  I'm running ports 1-4 as an LACP group with the following configuration:

 

interface GigabitEthernet1/0/1-4

 description xxxxxxxx

  channel-protocol lacp

  channel-group 1 mode active

 

Please let me know if any additional information is necessary to help understand my environment.

I've tried to upgrade to 15.2.4E10 and the group stops working. Any suggestions?

Thanks in advance,

Eric

9 Replies 9

Reza Sharifi
Hall of Fame
Hall of Fame

Hi,

Can you elaborate on what is the issue?

Also, what does this Porchannel connect to?  Does it connect to another switch, servers, storage, etc?. 

Can you post the output of "sh run" and "show ether-ch summary" for all devices involved in this configuration?

HTH

Hi Reza



Thanks for your reply. My 4-port group is connected to a Synology Rackstation file server. When I do the upgrade, I cannot see (ping) the Rackstation. If I revert to 15.0, it works just fine.



Here’s the results of the commands you requested:



#show etherchannel summary

Flags: D - down P - bundled in port-channel

I - stand-alone s - suspended

H - Hot-standby (LACP only)

R - Layer3 S - Layer2

U - in use f - failed to allocate aggregator



M - not in use, minimum links not met

u - unsuitable for bundling

w - waiting to be aggregated

d - default port





Number of channel-groups in use: 1

Number of aggregators: 1



Group Port-channel Protocol Ports

------+-------------+-----------+-----------------------------------------------

1 Po1(SD) LACP Gi1/0/1(I) Gi1/0/2(I) Gi1/0/3(I)

Gi1/0/4(I)

#show run

Building configuration...



Current configuration : 5700 bytes

!

version 15.0

no service pad

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname WentzSW

!

boot-start-marker

boot-end-marker

!

enable secret 5 $1$I6ew$9d8WC78KUNcJk4yvtRr3e/

!

no aaa new-model

clock timezone UTC -5 0

clock summer-time UTC recurring

switch 1 provision ws-c3750x-48p

system mtu routing 1500

!

!

!

!

crypto pki trustpoint TP-self-signed-2952139136

enrollment selfsigned

subject-name cn=IOS-Self-Signed-Certificate-2952139136

revocation-check none

rsakeypair TP-self-signed-2952139136

!

!

crypto pki certificate chain TP-self-signed-2952139136

certificate self-signed 01

xxxxxxx

quit

!

!

!

spanning-tree mode pvst

spanning-tree extend system-id

!

!

!

!

!

!

!

!

!

vlan internal allocation policy ascending

!

!

!

!

!

!

!

!

!

!

!

interface Port-channel1

!

interface FastEthernet0

no ip address

!

interface GigabitEthernet1/0/1

description Rackstation Port 1

channel-protocol lacp

channel-group 1 mode active

!

interface GigabitEthernet1/0/2

description Rackstation Port 2

channel-protocol lacp

channel-group 1 mode active

!

interface GigabitEthernet1/0/3

description Rackstation Port 3

channel-protocol lacp

channel-group 1 mode active

!

interface GigabitEthernet1/0/4

description Rackstation Port 4

channel-protocol lacp

channel-group 1 mode active

!

interface GigabitEthernet1/0/5

description Firewall Uplink

!

interface GigabitEthernet1/0/6

description Unifi Controller

!

interface GigabitEthernet1/0/7

description Unifi Access Point

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 1,50

switchport mode trunk

!

interface GigabitEthernet1/0/8

description Sonos Amp

!

interface GigabitEthernet1/0/9

description Unifi Access Point

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 1,50

switchport mode trunk

!

interface GigabitEthernet1/0/10

description Sonos Boost

!

interface GigabitEthernet1/0/11

!

interface GigabitEthernet1/0/12

!

interface GigabitEthernet1/0/13

description Unifi Study Switch

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 1,50

switchport mode trunk

!

interface GigabitEthernet1/0/14

!

interface GigabitEthernet1/0/15

!

interface GigabitEthernet1/0/16

!

interface GigabitEthernet1/0/17

!

interface GigabitEthernet1/0/18

!

interface GigabitEthernet1/0/19

!

interface GigabitEthernet1/0/20

!

interface GigabitEthernet1/0/21

!

interface GigabitEthernet1/0/22

!

interface GigabitEthernet1/0/23

!

interface GigabitEthernet1/0/24

!

interface GigabitEthernet1/0/25

!

interface GigabitEthernet1/0/26

!

interface GigabitEthernet1/0/27

!

interface GigabitEthernet1/0/28

!

interface GigabitEthernet1/0/29

!

interface GigabitEthernet1/0/30

!

interface GigabitEthernet1/0/31

!

interface GigabitEthernet1/0/32

!

interface GigabitEthernet1/0/33

!

interface GigabitEthernet1/0/34

!

interface GigabitEthernet1/0/35

!

interface GigabitEthernet1/0/36

!

interface GigabitEthernet1/0/37

!

interface GigabitEthernet1/0/38

!

interface GigabitEthernet1/0/39

!

interface GigabitEthernet1/0/40

!

interface GigabitEthernet1/0/41

!

interface GigabitEthernet1/0/42

!

interface GigabitEthernet1/0/43

!

interface GigabitEthernet1/0/44

description Guest Net

switchport access vlan 50

switchport mode access

!

interface GigabitEthernet1/0/45

description Internet Vlan

switchport access vlan 10

switchport mode access

!

interface GigabitEthernet1/0/46

description Internet Vlan

switchport access vlan 10

switchport mode access

!

interface GigabitEthernet1/0/47

description Internet Vlan

switchport access vlan 10

switchport mode access

!

interface GigabitEthernet1/0/48

description Internet Vlan

switchport access vlan 10

switchport mode access

!

interface GigabitEthernet1/1/1

!

interface GigabitEthernet1/1/2

!

interface GigabitEthernet1/1/3

!

interface GigabitEthernet1/1/4

!

interface TenGigabitEthernet1/1/1

!

interface TenGigabitEthernet1/1/2

!

interface Vlan1

description 10.1.1.0/24

ip address 10.1.1.3 255.255.255.0

!

ip default-gateway 10.1.1.1

ip http server

ip http secure-server

!

!

ip sla enable reaction-alerts

!

!

vstack

banner motd ^C

***************************************



Unauthorized access is prohibited



***************************************^C

!

line con 0

line vty 0 4

password xxxxxxx

login

line vty 5 15

password xxxxxxx

login

!

end
Thanks,
Eric

Hi Eric,

Thanks for the info!

1 Po1(SD) LACP Gi1/0/1(I) Gi1/0/2(I) Gi1/0/3(I)

So, the Po is down. Are the physical interfaces in up and up mode "sh ip int bri g1/0/1" same command for other 3.

If they are in up and up mode, can you shut down the po interface and bring it back up.

config t

int po1

sh

no sh

use "sh int po1" to see if the po is up. Can you post the output?

Also, is the po supposed to be configured as access mode or trunk mode as I don't see any config under the interface po1 right now?

HTH 

 

I went ahead and booted 15.2 – these are the results:

Here is the results of the sh ip commands for each line:
WentzSW#sh ip int bri g1/0/1
Interface IP-Address OK? Method Status Protocol
GigabitEthernet1/0/1 unassigned YES unset up down
WentzSW#sh ip int bri g1/0/2
Interface IP-Address OK? Method Status Protocol
GigabitEthernet1/0/2 unassigned YES unset up down
WentzSW#sh ip int bri g1/0/3
Interface IP-Address OK? Method Status Protocol
GigabitEthernet1/0/3 unassigned YES unset up down
WentzSW#sh ip int bri g1/0/4
Interface IP-Address OK? Method Status Protocol
GigabitEthernet1/0/4 unassigned YES unset up down

WentzSW#sh int po1
Port-channel1 is down, line protocol is down (notconnect)
Hardware is EtherChannel, address is 0000.0000.0000 (bia 0000.0000.0000)
MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto-speed, link type is auto, media type is unknown
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out

I’m supposed to be configured just as access mode – this is not a trunk. Like I said, it’s a connection to the interface bond (4 NICs) on my Synology file server.
Thanks again
Eric

Ok, the Po is down and the interfaces are not part of the Po.

Can you delete the po and also undo the commands under the interfaces and redo them.

no int po1

int g1/0/1

no chann-group 1

no chann protocol lacp

do this for all interface and than start redo them by adding the physical interfaces to the po first.

example

int g1/0/1

chann-group 1 mode active 

When you issue above command, this will create po1 for you and no need for the channel protocol lacp command at this time.

do the same for all interfaces.

Once this is done, go to the po interface and do a "no sh" to bring it up

config t

int po1

no sh

Now check the status of the physical interfaces and the po interface.

HTH

 

Here's another interesting set of logging messages.  I tried to shutdown and reopen the po1 interface:

WentzSW(config)#int po1
WentzSW(config-if)#sh
WentzSW(config-if)#no sh
WentzSW(config-if)#
*Jan  2 00:35:33.919: %LINK-5-CHANGED: Interface GigabitEthernet1/0/1, changed state to administratively down
*Jan  2 00:35:33.927: %LINK-5-CHANGED: Interface GigabitEthernet1/0/2, changed state to administratively down
*Jan  2 00:35:33.927: %LINK-5-CHANGED: Interface GigabitEthernet1/0/3, changed state to administratively down
*Jan  2 00:35:33.944: %LINK-5-CHANGED: Interface GigabitEthernet1/0/4, changed state to administratively down
*Jan  2 00:35:33.944: %LINK-5-CHANGED: Interface Port-channel1, changed state to administratively down
*Jan  2 00:35:36.200: %LINK-3-UPDOWN: Interface Port-channel1, changed state to down
*Jan  2 00:35:36.200: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to down
*Jan  2 00:35:36.209: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/2, changed state to down
*Jan  2 00:35:36.226: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/3, changed state to down
*Jan  2 00:35:36.226: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/4, changed state to down
*Jan  2 00:35:39.069: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
*Jan  2 00:35:39.162: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/3, changed state to up
*Jan  2 00:35:39.313: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/2, changed state to up
*Jan  2 00:35:39.388: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/4, changed state to up
*Jan  2 00:35:45.243: %EC-5-L3DONTBNDL2: Gi1/0/1 suspended: LACP currently not enabled on the remote port.
*Jan  2 00:35:45.579: %EC-5-L3DONTBNDL2: Gi1/0/2 suspended: LACP currently not enabled on the remote port.
*Jan  2 00:35:45.696: %EC-5-L3DONTBNDL2: Gi1/0/3 suspended: LACP currently not enabled on the remote port.
*Jan  2 00:35:45.797: %EC-5-L3DONTBNDL2: Gi1/0/4 suspended: LACP currently not enabled on the remote port.

 

I thought I understood configuring the LACP interfaces, obviously not...

This is the correct behavior. When you shutdown a po interface, it will also shutdown all the physical interfaces associated with it. The same for "no sh"

HTH

I tried the configuration as suggested - still no luck.  Here is a log of my session.

I "defaulted" g1/0/1-4 before doing all this and removed the po1 interface.

WentzSW(config)#int g1/0/1
WentzSW(config-if)#channel-gr
WentzSW(config-if)#channel-group 1 mode active
Creating a port-channel interface Port-channel 1
WentzSW(config-if)#
*Jan  2 00:13:49.473: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to down
WentzSW(config-if)#
*Jan  2 00:13:56.998: %EC-5-L3DONTBNDL2: Gi1/0/1 suspended: LACP currently not enabled on the remote port.
WentzSW(config-if)#channel-protocol lacp
WentzSW(config-if)#exit
WentzSW(config)#int g1/0/2
WentzSW(config-if)#channel-group 1 mode active
WentzSW(config-if)#channel-protocol lacp
WentzSW(config-if)#
*Jan  2 00:15:01.607: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to down
WentzSW(config-if)#exit
WentzSW(config)#channel-protocol lacp
*Jan  2 00:15:08.393: %EC-5-L3DONTBNDL2: Gi1/0/2 suspended: LACP currently not enableint g1/0/3
WentzSW(config-if)#channel-group 1 mode active
WentzSW(config-if)#channel-protocol lacp
*Jan  2 00:15:18.082: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/3, changed state to down
WentzSW(config-if)#exit
WentzSW(config)#int g1/0/3
*Jan  2 00:15:24.877: %EC-5-L3DONTBNDL2: Gi1/0/3 suspended: LACP currently not enabled on the remote port4
WentzSW(config-if)#channel-group 1 mode active
WentzSW(config-if)#channel-protocol lacp
*Jan  2 00:15:32.980: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/4, changed state to down
WentzSW(config-if)#exit
WentzSW(config)#
*Jan  2 00:15:40.002: %EC-5-L3DONTBNDL2: Gi1/0/4 suspended: LACP currently not enabled on the remote port.
WentzSW(config)#int po1
WentzSW(config-if)#no sh
WentzSW(config-if)#exit
WentzSW#show int po1
Port-channel1 is down, line protocol is down (notconnect)
  Hardware is EtherChannel, address is 0000.0000.0000 (bia 0000.0000.0000)
  MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed, link type is auto, media type is unknown
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
WentzSW#
WentzSW#show etherchannel summary
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      N - not in use, no aggregation
        f - failed to allocate aggregator
        M - not in use, minimum links not met
        m - not in use, port not aggregated due to minimum links not met
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port
        A - formed by Auto LAG

Number of channel-groups in use: 1
Number of aggregators:           1
Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(SD)         LACP      Gi1/0/1(s)  Gi1/0/2(s)  Gi1/0/3(s)
                                 Gi1/0/4(s)
Sorry to be a PITA, kind of a noob here and a bit confused.
-eric

Hi again and thanks.  I finally got it running - turns out that I had neglected to establish the LACP on the Synology end - apparently 15.0 was more tolerant of this configuration error. Let's put this to bed.  Thanks for your help and time. 

Eric

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