3 port lag question.

Still testing -   could use some advise.

My test is to plug one wire only into 1/0/1  .   do test then move wire to 2/0/1 , then 3/0/1 ] 

From the host that uses the lag I ping out.

tests:

 to ping to another switch .     after a 6-7 second delay ping works.

 to a virtual machine   only ports  1/0/1 and 2/0/1 ping after 7 seconds.

however for 3/0/1  after 20 seconds  ping to the virtual machine does not work.

I'll do more testing tomorrow. 

If you have any suggestions let me know

best regards

Roberto.

Hi obfantini,

What switch type for LAG1 neighbor? Does it support LACP mode LAG type?

As the default mode of LAG is static, it's better change mode to LACP. So I suggest you change the LACP mode and test again.

Hope it can helps!

thank you for the reponse.

we use this: 6 Src/Dest IP and TCP/UDP Port fields

I'll try to fully reply now. 

What switch type for LAG1 neighbor?  It is a proxmox host  this is the network/interface setting

auto bond0
iface bond0 inet manual
       slaves eth0 eth1
       bond_miimon 100
       bond_mode 802.3ad
       bond_xmit_hash_policy layer3+4

Does it support LACP mode LAG type?  I think so , not certain.  I think above code means yes.

As the default mode of LAG is static <<   Static mode is disabled .    

it's better change mode to LACP. So I suggest you change the LACP mode and test again.

Question -  in addition to changing mode to LACP ,

 should the lag  mode be set to statuc enabled?

Hi robfantini,

Yes, I notice that on proxmox host the LAG mode is 802.3ad, it's LACP already.

It's ok. Just keep current config and test again. And please give detailed test step and result for us to analysis further more.

OK this is the next test

Our issue is pinging imap server  10.1.3.16 .  and other virtual machines.    ping works with 1/0/1 and  2/0/1  . 

 If 3/0/1 and either other port is used ping fails.

So tried this test:  

 1- use ports  3/0/1  and 1/0/1  .  

 2- reboot proxmox server on that lag.  

 ping  still  fails to imap .

 same with 2/0/1 and 3/0/1

I can ping some virtual machines on the same vlan as imap.

all hardware systems can be pinged.

I can ping  all systems from desktop and elsewhere.

will continue testing  , checking configuration  etc.

If you have  suggested tests  let me know.

robfantini,

Do you mean there is packet lost when LAG member contain 3/0/1?

Could you please test as below step? With the test result, we want to narrow the problem further more.

1. Shutdown LAG member 1/0/1 and 2/0/1, only leave member 3/0/1

    show port-channel 11

    show port status 3/0/1

    then check ping result, is it ping failed?

2. Shutdown LAG member 1/0/1, leave member 2/0/1 and 3/0/1

    show port-channel 11

    show port status 2/0/1 & 3/0/1

    then check ping result

3. Shutdown LAG member 2/0/1, leave member 1/0/1 and 3/0/1

    show port-channel 11

    show port status 1/0/1 & 3/0/1

    then check ping result

OK   I am using  lag 1  not lag 11 .

And 2 ping tests,  1 from switch   , one from host connected to lag.

Note we are only using 2 wires attached to host .

1. Shutdown LAG member 1/0/1 and 2/0/1, only leave member 3/0/1

    show port-channel 1

(GSM7352Sv2) #show port-channel 1

Local Interface................................ lag 1
Channel Name................................... ch1
Link State..................................... Up
Admin Mode..................................... Enabled
Type........................................... Dynamic
Port-channel Min-links......................... 1
Load Balance Option............................ 6
(Src/Dest IP and TCP/UDP Port fields)
Local Preference Mode.......................... Disabled

Mbr    Device/       Port      Port
Ports  Timeout       Speed     Active
------ ------------- --------- -------
3/0/1  actor/long    Auto      True
       partner/long

    show port status 3/0/1

(GSM7352Sv2) #show port status 3/0/1

         Media        STP     Physical    Physical     Link      Loop   Partner Flow
 Intf    Type         Mode      Mode       Status     Status    Status     Control
------  -----------  ------  ----------  ----------  --------  -------- ------------
3/0/1   1000TX       DIS     Auto        1000 Full   Up                 On

    then check ping result, is it ping failed?

ping from switch works

** ping from host does not.**

2. Shutdown LAG member 1/0/1, leave member 2/0/1 and 3/0/1

    show port-channel 1

(GSM7352Sv2) #show port status 1/0/1 

 Media STP Physical Physical Link Loop Partner Flow
 Intf Type Mode Mode Status Status Status Control
------ ----------- ------ ---------- ---------- -------- -------- ------------
1/0/1 DIS Auto Down Off

(GSM7352Sv2) #show port status 2/0/1 

 Media STP Physical Physical Link Loop Partner Flow
 Intf Type Mode Mode Status Status Status Control
------ ----------- ------ ---------- ---------- -------- -------- ------------
2/0/1 DIS Auto Down Off

(GSM7352Sv2) #show port-channel 1 

Local Interface................................ lag 1
Channel Name................................... ch1
Link State..................................... Up
Admin Mode..................................... Enabled
Type........................................... Dynamic
Port-channel Min-links......................... 1
Load Balance Option............................ 6
(Src/Dest IP and TCP/UDP Port fields)
Local Preference Mode.......................... Disabled

Mbr Device/ Port Port
Ports Timeout Speed Active
------ ------------- --------- -------
3/0/1 actor/long Auto True
 partner/long
2/0/1 actor/long Auto True
 partner/long

    show port status 2/0/1 & 3/0/1

(GSM7352Sv2) #show port status 2/0/1 

 Media STP Physical Physical Link Loop Partner Flow
 Intf Type Mode Mode Status Status Status Control
------ ----------- ------ ---------- ---------- -------- -------- ------------
2/0/1 1000TX DIS Auto 1000 Full Up On

(GSM7352Sv2) #show port status 3/0/1 

 Media STP Physical Physical Link Loop Partner Flow
 Intf Type Mode Mode Status Status Status Control
------ ----------- ------ ---------- ---------- -------- -------- ------------
3/0/1 1000TX DIS Auto 1000 Full Up On

    then check ping result  -  Ping works  from switch and  connected host.

3. Shutdown LAG member 2/0/1, leave member 1/0/1 and 3/0/1

    show port-channel 1

(GSM7352Sv2) #show port-channel 1

Local Interface................................ lag 1
Channel Name................................... ch1
Link State..................................... Up
Admin Mode..................................... Enabled
Type........................................... Dynamic
Port-channel Min-links......................... 1
Load Balance Option............................ 6
(Src/Dest IP and TCP/UDP Port fields)
Local Preference Mode.......................... Disabled

Mbr Device/ Port Port
Ports Timeout Speed Active
------ ------------- --------- -------
3/0/1 actor/long Auto True
 partner/long
1/0/1 actor/long Auto True
 partner/long

    show port status 1/0/1 & 3/0/1

(GSM7352Sv2) #show port status 1/0/1

         Media        STP     Physical    Physical     Link      Loop   Partner Flow
 Intf    Type         Mode      Mode       Status     Status    Status     Control
------  -----------  ------  ----------  ----------  --------  -------- ------------
1/0/1   1000TX       DIS     Auto        1000 Full   Up                 On

(GSM7352Sv2) #show port status 3/0/1

         Media        STP     Physical    Physical     Link      Loop   Partner Flow
 Intf    Type         Mode      Mode       Status     Status    Status     Control
------  -----------  ------  ----------  ----------  --------  -------- ------------
3/0/1   1000TX       DIS     Auto        1000 Full   Up                 On

    then check ping result :  works from switch and host . when both plugged in.  

  If I unplug 1/0/1:  ping ok from switch,  ping fail from host

So when 3/0/1 is used alone  ping from attached host fails always I think.

robfantini

'then check ping result :  works from switch and host . when both plugged in.   

  If I unplug 1/0/1:  ping ok from switch,  ping fail from host 

So when 3/0/1 is used alone  ping from attached host fails always I think.'

In your description, when unplug 1/0/1, please check host LAG status, does LAG only have one active member port(connect to 3/0/1)?

As I cannot understand that: if shutdown 1/0/1&2/0/1, only leave 3/0/1 in the LAG, the ping result is success both from Switch and Host. Why the result is different between shutdown and unplug?

please re check what I wrote: for 1ST test:

"ping from switch works
** ping from host does not.**   "

using   hash mode "3 Src/Dest MAC, VLAN, EType, incoming port"     fixed the issue.

would you like me to do any more testing?

robfantini

Good news!

No need test any more.

Thanks.