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0ram
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CSS326-24G-2S+RM hangs until power cycle

Wed Dec 19, 2018 1:31 pm

Every couple of weeks, I have to power cycle the switch in order for it to work again. The SwOS is the latest 2.8.
The green lights are still on when the switch hangs but no connection is possible until power is cycled.
Is this a known bug in firmware?
 
jonwang
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Re: CSS326-24G-2S+RM hangs until power cycle

Thu Dec 20, 2018 5:48 am

I've had this happen too on a couple of these but it's always been in a production/hurry situation where I haven't been able to troubleshoot without rebooting. Super pain and sounds similar. Lights are on but no ssh, no GUI, doesn't pass traffic.
 
3freet
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Re: CSS326-24G-2S+RM hangs until power cycle

Wed Dec 26, 2018 2:17 pm

I've had this happen too on a couple of these but it's always been in a production/hurry situation where I haven't been able to troubleshoot without rebooting. Super pain and sounds similar. Lights are on but no ssh, no GUI, doesn't pass traffic.


I'm experiencing the exact same thing as well. Wanna add something though, it actually does pass/forward ICMP packets (but not other protocols) during these hangs, which I guess makes watchdog functionality entirely useless

I emailed support@mikrotik.com about this issue.

I hope they get it fixed
 
Paternot
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Re: CSS326-24G-2S+RM hangs until power cycle

Wed Dec 26, 2018 4:29 pm

I have two of these in production, with one 10Gib fiber, one VLAN trunk port and about 4 VLANs each. Rock solid, with an uptime of 56 and 62 days. True, the traffic is light - but even when stress testing I didn't get problems.

Maybe some specific configuration, triggering a bug?

Or could it be the power? Some transient, some spike? Noise on the line, maybe? They run quite cool, so I don't think it would be temperature related.
 
3freet
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Re: CSS326-24G-2S+RM hangs until power cycle

Wed Dec 26, 2018 10:28 pm

I have two of these in production, with one 10Gib fiber, one VLAN trunk port and about 4 VLANs each. Rock solid, with an uptime of 56 and 62 days. True, the traffic is light - but even when stress testing I didn't get problems.

Maybe some specific configuration, triggering a bug?

Or could it be the power? Some transient, some spike? Noise on the line, maybe? They run quite cool, so I don't think it would be temperature related.


What firmware version you using?

Are there any special configurations?

RSTP? ...
 
Paternot
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Re: CSS326-24G-2S+RM hangs until power cycle

Thu Dec 27, 2018 1:58 am

I have two of these in production, with one 10Gib fiber, one VLAN trunk port and about 4 VLANs each. Rock solid, with an uptime of 56 and 62 days. True, the traffic is light - but even when stress testing I didn't get problems.

Maybe some specific configuration, triggering a bug?

Or could it be the power? Some transient, some spike? Noise on the line, maybe? They run quite cool, so I don't think it would be temperature related.


What firmware version you using?

Are there any special configurations?

RSTP? ...
I'm using firmware 2.8
RSTP, IGMP snooping, no LAG, no forwarding, VLANs and no ACLs.

Each of them has a trunk of 10Gb (module S+85DLC03D), and about 15 computers. The trunk connects them to a CRS328, where the servers are connected.
 
3freet
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Re: CSS326-24G-2S+RM hangs until power cycle

Thu Dec 27, 2018 7:47 am

Then it's either wrong configurations or faulty units. I thought there was something wrong with the firmware. I was on 2.8, now downgraded to 2.7 just in case. I will test it and see but probably will have to wait 6-10 days.
 
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mozerd
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Re: CSS326-24G-2S+RM hangs until power cycle

Fri Dec 28, 2018 6:10 pm

Then it's either wrong configurations or faulty units. I thought there was something wrong with the firmware. I was on 2.8, now downgraded to 2.7 just in case. I will test it and see but probably will have to wait 6-10 days.
[edit] oops my mistake ... the unit I purchased is the CRS326 and not the CCS326.
I just got one of these and under SWOS it states upgrade 2.9 available but when I upgrade and it reboots automatically the upgrade does NOT take. Tried this a few times with the exact same behavior. Not good experience.
Last edited by mozerd on Mon Dec 31, 2018 2:56 am, edited 1 time in total.
 
Paternot
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Re: CSS326-24G-2S+RM hangs until power cycle

Fri Dec 28, 2018 6:31 pm

Then it's either wrong configurations or faulty units. I thought there was something wrong with the firmware. I was on 2.8, now downgraded to 2.7 just in case. I will test it and see but probably will have to wait 6-10 days.
I just got one of these and under SWOS it states upgrade 2.9 available but when I upgrade and it reboots automatically the upgrade does NOT take. Tried this a few times with the exact same behavior. Not good experience.
Yes, I see this too. I don't know where it comes from, but there is only 2.8

Don't even try this upgrade.
 
0ram
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Re: CSS326-24G-2S+RM hangs until power cycle

Mon Dec 31, 2018 12:23 am

Then it's either wrong configurations or faulty units. I thought there was something wrong with the firmware. I was on 2.8, now downgraded to 2.7 just in case. I will test it and see but probably will have to wait 6-10 days.
It could be a defective device. I have two CSS326. Only one of them has this hangs until now. The well functioning switch has uptime ~38 days now. Could be also because it has much less traffic than the "defective" one.
 
Kevo
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Re: CSS326-24G-2S+RM hangs until power cycle

Mon Dec 31, 2018 6:03 pm

We still run 2.4 on our CSS326 and it has been running fine so far. We only use it as a basic switch and don't have any extra features or functionality turned on. I'm pretty sure we did have to reboot it once after some storms, but we are thinking it was do to one or more of our wireless backhaul radios going wacky which they occasionally do during thunderstorms. We had to reboot those as well.

We've been reluctant to update past 2.4 because of the reported issues.
 
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k6ccc
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Re: CSS326-24G-2S+RM hangs until power cycle

Thu Jan 03, 2019 7:38 am

Only time I have had one of CSS326 switches hang is when I had a problem DSL modem. The modem would crash, and after power cycling it, the switch would shortly lock up. Replaced the DSL modem after we determined that it was having a problem. Never had a problem with the switch since. Currently it is showing an uptime of 136 days. It is running version 2.8

As I understand it, 2.9 was released and immediately recalled. That left the phantom 2.9 availability.
RB750Gr3, RB750r2, CRS326-24G-2S (in SwitchOS), CSS326-24G-2S, CSS106-5G-1S, RB260GS
Not sure if I beat them in submission, or they beat me into submission


Jim
 
creed23
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Re: CSS326-24G-2S+RM hangs until power cycle

Sun Jan 06, 2019 4:07 pm

We see te same problem.
 
3freet
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Re: CSS326-24G-2S+RM hangs until power cycle

Sat Jan 12, 2019 9:54 pm

Then it's either wrong configurations or faulty units. I thought there was something wrong with the firmware. I was on 2.8, now downgraded to 2.7 just in case. I will test it and see but probably will have to wait 6-10 days.


UPDATE:

After downgrading to 2.7, the switch hanged on the fifth day.
I contacted MikroTik support and they provided me with firmware 2.9 (still beta in the testing phase I think) and now it's been 10 days functioning well with no issues.

I am not sure whether this related or not, but I grounded the switch just before upgrading to 2.9 since I had issues with static electricity building up on the switch case. I don't think this was the problem because as I said before, the switch keeps forwarding ICMP packets which suggests that it is not a hardware issue. I think 2.9 fixed it.

(just in case, ground your switch if it is not grounded and see if it fixes anything)
 
gregecslo
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Re: CSS326-24G-2S+RM hangs until power cycle

Sun Jan 13, 2019 5:32 pm

Did you receive 2.9 RC7 ?
 
3freet
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Re: CSS326-24G-2S+RM hangs until power cycle

Mon Jan 14, 2019 5:49 pm

Did you receive 2.9 RC7 ?

I'm not sure of the exact version, but SwOS gui says 2.9 (built at Tue Dec 18 2018)

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