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2910al - Can't remove dynamic LACP trunk group

las_2
Occasional Advisor

2910al - Can't remove dynamic LACP trunk group

Hello there!

I want to create a trunked link among two 2910als, after creating dynamic LACP trunk on two ports with command
#int 46,48 lacp active
2910al lost connection to second one,
and now I cannot remove LACP trunk.
MGC says: "To remove port C6 from the dynamic trunk and return it to passive LACP, you would do the following:
#no interface c6 lacp
#interface c6 lacp passive
"
but issueing these commands returns:
sw1-2910-48(config)# no int 46,48 lacp
46: Operation is not allowed for a trunked port.
sw1-2910-48(config)# no int 46 lacp
46: Operation is not allowed for a trunked port.
sw1-2910-48(config)# no int 48 lacp
48: Operation is not allowed for a trunked port.
sw1-2910-48(config)#

sw1-2910-48(config)# sh lacp

LACP

PORT LACP TRUNK PORT LACP LACP
NUMB ENABLED GROUP STATUS PARTNER STATUS
---- ------- ------- ------- ------- -------
46 Active Dyn1 Up Yes Success
48 Active Dyn1 Up Yes Success

It was too late when I read in MGC:"If you want to use LACP for a trunk on a non-default VLAN and GVRP is disabled (this is my case - las), configure the trunk as a static trunk"

sw1-2910-48(config)# sh vlan 1

Status and Counters - VLAN Information - VLAN 1

VLAN ID : 1
Name : DEFAULT_VLAN
Status : Port-based
Voice : No
Jumbo : No

Port Information Mode Unknown VLAN Status
---------------- -------- ------------ ----------
45 Untagged Learn Up
47 Untagged Learn Up
Dyn1 Untagged Learn Up

Overridden Port VLAN configuration

Port Mode
---- ------------


sw1-2910-48(config)#

sw1-2910-48(config)# sh trunk

Load Balancing

Port | Name Type | Group Type
---- + -------------------------------- --------- + ----- --------
46 | 100/1000T | Dyn1 LACP
48 | 100/1000T | Dyn1 LACP

a piece of related 2910al config:

hostname "sw1-2910-48"
time timezone 480
time daylight-time-rule Western-Europe
qos dscp-map 101110 priority 6
module 1 type J9147A
stack join 0026F195AD80
interface 46
lacp Active
exit
interface 48
lacp Active
exit

ip routing
vlan 1
name "DEFAULT_VLAN"
untagged 45-48
no untagged 1-44
no ip address
exit
vlan 10
name "data"
untagged 1-44
ip helper-address 192.168.111.251
ip address 192.168.201.1 255.255.255.0
tagged 45-48
exit


Secondary 2910al shows the same output

sw2-2910-48(config)# sh lacp

LACP

PORT LACP TRUNK PORT LACP LACP
NUMB ENABLED GROUP STATUS PARTNER STATUS
---- ------- ------- ------- ------- -------
46 Active Dyn1 Up Yes Success
48 Active Dyn1 Up Yes Success


sw2-2910-48(config)# sh trunk

Load Balancing

Port | Name Type | Group Type
---- + -------------------------------- --------- + ----- --------
46 | 100/1000T | Dyn1 LACP
48 | 100/1000T | Dyn1 LACP

sw2-2910-48(config)#

Config of sw2 is similar.

==========================
How to fix it?
How to remove dynamic LACP group?

Sincerely, Alexey





2 REPLIES
Tore Valberg
Trusted Contributor

Re: 2910al - Can't remove dynamic LACP trunk group

Hi Alexey

You need to disconnect the port currently active in the trunk before you can issue the commands.

If you would be allowed to disable LACP on an active trunk, it would immediately create a loop.

Tore
las_2
Occasional Advisor

Re: 2910al - Can't remove dynamic LACP trunk group

All the genious things are simple.

Exactly as you wrote.

I think HP should add warning in their docs to prevent user's brain damage :) Now, there is not a word about possible problems when dismounting trunk group.

It would be nice if warning message in firmware would printed on console. Something like : "To prevent loops physically disconnect port to be removed from trunk group"

Thank you very much.

I make static trunk, tag it for VLAN, and everything is OK now.