Comware

Hi guys,

i neede some help.

Per todays session we have discovered some interesting things

OS runs Bonding in active \ passive

switch has no bonding but STP edged enabled

Whenever you do a failover of the bond master you will drop 2-20 packets

Whenever you do a if down of the bond master you will drop 2-20 packets

However...

If we down the interface on the switch side we have no packet loss (shutdown interface xyz)

This was kinda what I was discussing testing with someone onsite pulling the cable, so I'm guessing the result will be the same with a pulled cable, i.e no packet loss

I'm curious that the interfaces switch side stays UP when you down them in the OS, I'm not 100% sure this is correct behavior.. we can't see anything special in the switch logs at least.

I would say the failover behaves as expected during an actual error (death of switch, card, cable etc) so that should be good for most stuff, however it should also behave properly on a manual failover, we need to investigate why it does not?

Hi guys,

i neede some help.

Per todays session we have discovered some interesting things

OS runs Bonding in active \ passive

switch has no bonding but STP edged enabled

Whenever you do a failover of the bond master you will drop 2-20 packets

Whenever you do a if down of the bond master you will drop 2-20 packets

However...

If we down the interface on the switch side we have no packet loss (shutdown interface xyz)

This was kinda what I was discussing testing with someone onsite pulling the cable, so I'm guessing the result will be the same with a pulled cable, i.e no packet loss

I'm curious that the interfaces switch side stays UP when you down them in the OS, I'm not 100% sure this is correct behavior.. we can't see anything special in the switch logs at least.

I would say the failover behaves as expected during an actual error (death of switch, card, cable etc) so that should be good for most stuff, however it should also behave properly on a manual failover, we need to investigate why it does not?

Hi Parnassus,

thanks for the quick response. We have on one side one storage node and on the other side 2 comware 5945, because the bond from the storage node has 2 connections to 2 different 5945 for redundancy. So when we play arrond and do some tests we saw some packets were lost.

If i from the switch side shutdown the ports bond failover works as expected, no packet lost, but when shutting down the port from server/storage side we have packes getting lost, when the we pull out the cable we see again some packets getting lost.

Bond mode 1 active/backup

Switch port - stp edge port

Thanks in advance!

Hi guys,

i neede some help.

Per todays session we have discovered some interesting things

OS runs Bonding in active \ passive

switch has no bonding but STP edged enabled

Whenever you do a failover of the bond master you will drop 2-20 packets

Whenever you do a if down of the bond master you will drop 2-20 packets

However...

If we down the interface on the switch side we have no packet loss (shutdown interface xyz)

This was kinda what I was discussing testing with someone onsite pulling the cable, so I'm guessing the result will be the same with a pulled cable, i.e no packet loss

I'm curious that the interfaces switch side stays UP when you down them in the OS, I'm not 100% sure this is correct behavior.. we can't see anything special in the switch logs at least.

I would say the failover behaves as expected during an actual error (death of switch, card, cable etc) so that should be good for most stuff, however it should also behave properly on a manual failover, we need to investigate why it does not?

Hi Parnassus,

thanks for the quick response. We have on one side one storage node and on the other side 2 comware 5945, because the bond from the storage node has 2 connections to 2 different 5945 for redundancy. So when we play arrond and do some tests we saw some packets were lost.

If i from the switch side shutdown the ports bond failover works as expected, no packet lost, but when shutting down the port from server/storage side we have packes getting lost, when the we pull out the cable we see again some packets getting lost.

Bond mode 1 active/backup

Switch port - stp edge port

Thanks in advance!

Hi guys,

i neede some help.

Per todays session we have discovered some interesting things

OS runs Bonding in active \ passive

switch has no bonding but STP edged enabled

Whenever you do a failover of the bond master you will drop 2-20 packets

Whenever you do a if down of the bond master you will drop 2-20 packets

However...

If we down the interface on the switch side we have no packet loss (shutdown interface xyz)

This was kinda what I was discussing testing with someone onsite pulling the cable, so I'm guessing the result will be the same with a pulled cable, i.e no packet loss

I'm curious that the interfaces switch side stays UP when you down them in the OS, I'm not 100% sure this is correct behavior.. we can't see anything special in the switch logs at least.

I would say the failover behaves as expected during an actual error (death of switch, card, cable etc) so that should be good for most stuff, however it should also behave properly on a manual failover, we need to investigate why it does not?

Hi,

no, it is a DRNI config between switches.

Original Message:
Sent: Aug 21, 2023 02:34 PM
From: parnassus
Subject: Bond failover ping loss

Original Message:
Sent: 8/21/2023 2:08:00 PM
From: VM77
Subject: RE: Bond failover ping loss

Hi Parnassus,

thanks for the quick response. We have on one side one storage node and on the other side 2 comware 5945, because the bond from the storage node has 2 connections to 2 different 5945 for redundancy. So when we play arrond and do some tests we saw some packets were lost.

If i from the switch side shutdown the ports bond failover works as expected, no packet lost, but when shutting down the port from server/storage side we have packes getting lost, when the we pull out the cable we see again some packets getting lost.

Bond mode 1 active/backup

Switch port - stp edge port

Thanks in advance!

Original Message:
Sent: Aug 21, 2023 11:07 AM
From: parnassus
Subject: Bond failover ping loss

Original Message:
Sent: 8/17/2023 10:33:00 AM
From: VM77
Subject: Bond failover ping loss

Hi guys,

i neede some help.

Per todays session we have discovered some interesting things

OS runs Bonding in active \ passive

switch has no bonding but STP edged enabled

Whenever you do a failover of the bond master you will drop 2-20 packets

Whenever you do a if down of the bond master you will drop 2-20 packets

However...

If we down the interface on the switch side we have no packet loss (shutdown interface xyz)

This was kinda what I was discussing testing with someone onsite pulling the cable, so I'm guessing the result will be the same with a pulled cable, i.e no packet loss

I'm curious that the interfaces switch side stays UP when you down them in the OS, I'm not 100% sure this is correct behavior.. we can't see anything special in the switch logs at least.

I would say the failover behaves as expected during an actual error (death of switch, card, cable etc) so that should be good for most stuff, however it should also behave properly on a manual failover, we need to investigate why it does not?

Hi,

no, it is a DRNI config between switches.

Hi Parnassus,

thanks for the quick response. We have on one side one storage node and on the other side 2 comware 5945, because the bond from the storage node has 2 connections to 2 different 5945 for redundancy. So when we play arrond and do some tests we saw some packets were lost.

If i from the switch side shutdown the ports bond failover works as expected, no packet lost, but when shutting down the port from server/storage side we have packes getting lost, when the we pull out the cable we see again some packets getting lost.

Bond mode 1 active/backup

Switch port - stp edge port

Thanks in advance!

Hi guys,

i neede some help.

Per todays session we have discovered some interesting things

OS runs Bonding in active \ passive

switch has no bonding but STP edged enabled

Whenever you do a failover of the bond master you will drop 2-20 packets

Whenever you do a if down of the bond master you will drop 2-20 packets

However...

If we down the interface on the switch side we have no packet loss (shutdown interface xyz)

This was kinda what I was discussing testing with someone onsite pulling the cable, so I'm guessing the result will be the same with a pulled cable, i.e no packet loss

I'm curious that the interfaces switch side stays UP when you down them in the OS, I'm not 100% sure this is correct behavior.. we can't see anything special in the switch logs at least.

I would say the failover behaves as expected during an actual error (death of switch, card, cable etc) so that should be good for most stuff, however it should also behave properly on a manual failover, we need to investigate why it does not?

Hi guys,

i neede some help.

Per todays session we have discovered some interesting things

OS runs Bonding in active \ passive

switch has no bonding but STP edged enabled

Whenever you do a failover of the bond master you will drop 2-20 packets

Whenever you do a if down of the bond master you will drop 2-20 packets

However...

If we down the interface on the switch side we have no packet loss (shutdown interface xyz)

This was kinda what I was discussing testing with someone onsite pulling the cable, so I'm guessing the result will be the same with a pulled cable, i.e no packet loss

I'm curious that the interfaces switch side stays UP when you down them in the OS, I'm not 100% sure this is correct behavior.. we can't see anything special in the switch logs at least.

I would say the failover behaves as expected during an actual error (death of switch, card, cable etc) so that should be good for most stuff, however it should also behave properly on a manual failover, we need to investigate why it does not?

"OS runs Bonding in active \ passive"

can you give more config details ?

(When I see "active/passive" I read "not LACP")

On the switch, check for stp status of interfaces (maybe the bonding sends or "passes" BPDUs ?

display stp

display stp abnormal

Hi guys,

i neede some help.

Per todays session we have discovered some interesting things

OS runs Bonding in active \ passive

switch has no bonding but STP edged enabled

Whenever you do a failover of the bond master you will drop 2-20 packets

Whenever you do a if down of the bond master you will drop 2-20 packets

However...

If we down the interface on the switch side we have no packet loss (shutdown interface xyz)

This was kinda what I was discussing testing with someone onsite pulling the cable, so I'm guessing the result will be the same with a pulled cable, i.e no packet loss

I'm curious that the interfaces switch side stays UP when you down them in the OS, I'm not 100% sure this is correct behavior.. we can't see anything special in the switch logs at least.

I would say the failover behaves as expected during an actual error (death of switch, card, cable etc) so that should be good for most stuff, however it should also behave properly on a manual failover, we need to investigate why it does not?