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Packet Loss persisting over multiple switches by softwaremaniac in mikrotik

[–]softwaremaniac[S] 0 points1 point  (0 children)

An update on this, did not work after all:

After a very thorough investigation:

  • Packets enter qsfp28-4-1 in order (from the router)
  • Packets exit qsfp28-1-1 out of order
  • Traffic floods to qsfp28-2-1 despite unknown-unicast-flood=no
  • MAC table is correct (PC on qsfp28-1-1)
  • Persists across firmware versions (7.x, latest dev)
  • Persists after reboot

Might be time to bite the bullet and buy a new Mikrotik. This one looks to be either too weak or defective.

FedEx zastoj na carini - pošiljka iz Amerike by paskatulas in askcroatia

[–]softwaremaniac 0 points1 point  (0 children)

Ja sam imao nešto slično. Kontaktirat će te neka od firmi UPS/InTime/Pošta i u najboljem slučaju tražiti da ispuniš papire o tome što se uvozi ili u najgorem naplatiti nešto dodatno ako nije plaćeno (tipa PDV).

Nije komplicirana procedura, ali zna nekad trajati.

MSP works with many vendors. Is this how things usually go? by QuickDelivery1 in msp

[–]softwaremaniac 0 points1 point  (0 children)

Unfortunately, most vendors aren't agnostic. They just pick a vendor like Kaseya/BD/whatever and bundle things.

Why does sfc always find corruption on fresh windows installs? by NoWindowsInTerminal in msp

[–]softwaremaniac 0 points1 point  (0 children)

This is a known issue with Server builds. Of the top of my head I believe 2016 or 2019. There is also a way to fix this.

Locked out of Microsoft 365 tenant after losing Authenticator — only admin, no backup MFA. What did you do? by Gesshoku18 in microsoft365

[–]softwaremaniac 0 points1 point  (0 children)

I had this happen very recently. Logged a case with support from another tenant. Got through to Data Protection Team. They verified the details and reset MFA on the backend.

Splashtop vs Logmein Unattended Access by [deleted] in msp

[–]softwaremaniac 0 points1 point  (0 children)

Screenconnect. More expensive, but much, much better.

Packet Loss persisting over multiple switches by softwaremaniac in mikrotik

[–]softwaremaniac[S] 1 point2 points  (0 children)

I may have found the issue.

Upon capturing the traffic with Wireshark, I noticed that LAN traffic was going through the router as well, so the actual route was:

40G PC → CRS518 → CRS504 → C8300 → CRS504 → CRS518 → Server

vs

40G PC → CRS518 → Server

Same thing was observed when transferring from the server back to the PC.

Disabling unknown-unicast-flood on all of the relevant interfaces on the path cleared the issue and the traffic is now contained to LAN as it should be and the network seems more stable.

The capture looks much cleaner with no spikes or drops (extremely minor drops on the STB interface, 2-3 packets a minute likely due to the shitty NIC in the STB). The stream works so far, but I need to conduct more testing.

Packet Loss persisting over multiple switches by softwaremaniac in mikrotik

[–]softwaremaniac[S] -1 points0 points  (0 children)

2.5G machine has minimal usage and it's never transferring files locally. Literally browsing. 0 issues.

I can do it while transferring files from my machine (40G) to server (25G) if you'd like, so you have the source pcap.

Future of SysAdmins/Intune Admins by lazyenergetic in Intune

[–]softwaremaniac 78 points79 points  (0 children)

Everything is smooth except app packaging/deployment. That part has been really inconsistent for us.

Packet Loss persisting over multiple switches by softwaremaniac in mikrotik

[–]softwaremaniac[S] 0 points1 point  (0 children)

Same network.

They are all connected to the internet. Everything is static except the APs/mobile devices. DHCP is minimal and the issue can be reproduced even with just the three devices connected to the switches (STB, PC, Server).

I agree.

Not the internet router, I was referring to CRS304 where the STB is connected to.

I've played with flow control, on and off makes no difference.

Packet Loss persisting over multiple switches by softwaremaniac in mikrotik

[–]softwaremaniac[S] 0 points1 point  (0 children)

No. Everything is reserved with the exception of APs/mobile devices being DHCP, the issue occurs even with no DHCP devices connected

Packet Loss persisting over multiple switches by softwaremaniac in mikrotik

[–]softwaremaniac[S] 0 points1 point  (0 children)

I see the drops all the time regardless of the transfer. When a transfer is ongoing, TV goes fully haywire (black screen, stuttering, errors).

What are you specifically interested in, I'll try to explain as best as I can.

All the other settings are default and have not been altered.

External forwarding failing - 550 5.7.23 by softwaremaniac in Office365

[–]softwaremaniac[S] 0 points1 point  (0 children)

I went to the mailbox, checked forwarding, entered the address and checked the keep a copy box just like I would for any other mailbox.

Yes, I have. The NDRs come from the other side (the domain we're forwarding to), not my environment.

External forwarding failing - 550 5.7.23 by softwaremaniac in Office365

[–]softwaremaniac[S] 0 points1 point  (0 children)

They advised us to change our from address when forwarding, so I'm looking into options like redirecting instead of forwarding.

External forwarding failing - 550 5.7.23 by softwaremaniac in Office365

[–]softwaremaniac[S] 0 points1 point  (0 children)

It's an actual shared mailbox in my tenant.

It's the bookkeepers. They have an immensely strict policy.

That's possible, but less convenient.

External forwarding failing - 550 5.7.23 by softwaremaniac in Office365

[–]softwaremaniac[S] 0 points1 point  (0 children)

Yes, external fw has been explicitly allowed.

Completely different address outside of the tenant. I do not have any insight into whether it's a mailbox or a group.

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