I have two routers on a LAN. The Mikrotik RB2011 is the default gateway for the LAN. There is a second Cisco router on the LAN for which the MT has a static route defined for a specific network.
The issue is that the Mikrotik router does not always relay packets that should be routed to the Cisco router.
I used the MT packet sniffer with streaming feature to capture the attached traffic. In the capture, you can see that the host PC (10.33.33.58) sends packets destined for 10.32.122.31 to the default gateway (MT at 10.33.33.2). The MT has a static route for the 10.0.0.0/8 pointing at a Cisco router at 10.33.33.1. The attached spreadsheet shows my analysis of each packet in the capture and demonstrates that the MT is dropping some packets.
Has anyone seen this behavior? The workaround is to add a static route to each PC for the 10.0.0.0/8 network so the PC avoids the Mikrotik for that network. That’s fine for the moment.
We brought up a second site yesterday with the same results. Both are unfortunately on 6.11 software. We’ll be updating one site tonight to the current revision, but I haven’t seen anything in the release notes addressing this so I’m not too hopeful.
I’ll update after our test tomorrow. I was just wondering if anyone else has seen similar behavior.
Thanks.
Update: 6.25 exhibits the same symptoms. Has anyone else seen this issue?
wrpd_session_relay_fail.xlsx (5.25 KB)
wrpd_session_relay_fail.pcapng.gz (8.8 KB)