All,
I have set up a network infrastructure consisting of four Mikrotik Switches:
2x CRS317-16s-1g
2x CRS326-24s-2q
The Switches are configured as described in https://wiki.mikrotik.com/wiki/Manual:Spanning_Tree_Protocol.
Bridge IDs are 0x0000, 0x1000, 0x2000 and 0x3000; Path Costs are as described.
Version is the current stable release 6.46.1 (also tried with long-term - no differences there!)
As we do not have VLANs on the backend switches this should work.
Nevertheless, after days of struggling and very unfunny events (i.e. unmotivated loops, etc.) I am next to giving it up with mikrotik switches.
- I have, in the last couple of days, experienced four complete shutdowns due to loops.
- I have even tried with MSTP, to no avail (even worse)
Honestly, this is not acceptable by any means. I need a stable, reliable infrastructure - and not somehthing that unmotivatedly gives up at times…
Log on one of the switches:
14:05:13 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:7c), probably loop
14:05:27 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:92), probably loop
14:05:32 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:92), probably loop
14:05:55 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:7c), probably loop
14:06:00 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:7c), probably loop
14:06:27 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:7c), probably loop
14:07:27 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:92), probably loop
14:07:32 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:92), probably loop
14:08:27 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:92), probably loop
14:09:27 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:92), probably loop
14:10:27 interface,warning 80G_CrossLink: bridge port received packet with own address as source address (74:4d:28:d2:67:92), probably loop
14:10:56 interface,warning qsfpplus2-1 excessive broadcasts/multicasts, probably a loop
You don’t have to tell me: Yes, it’s a loop. It’s a loop that should not exist unsing rstp. Definitively(!) not(!)
I can provide further logs if desired…
Could someone please have a loop at why this is happening at times (at other times, it’s just working fine). But it’s unreliable.
CU
DCMoomin