ROS v6 x86 and SFP cards (Problems?)

RouterOS General
1

I have a few x86 routers using ROS v6 (6.34, 6.32, and 6.36).
All of them have SPF cards.

When I ping 1500 byte packets via IP the pings are replied too.
When I MAC ping 1500 byte packets the pings timeout.
If I lower the packet size to 498 bytes the MAC pings are replied too.

Can anyone confirm this behavior?

This is preventing me from using eoip tunnels over these connections, also vlans are adversely affected as well, which is how I identified the problem.

EDIT Does not matter what device it is connected to.. PC, CCR1072, ROS x86, etc.

2

Sounds like a problem related to MTU vs. L2MTU. Check your settings.

3

The MTU is set 4 1500.

If it were in fact the MTU the IP ping would have not gotten replies either.

I am simply asking if anyone with an x86 with ROS 6 and sfp ports can verify this behaviour.

The sfp card I have is a hotlava 4 port sfp card.

Routers in question are the Maxxwave Corei7 Router as well as an original Lanner i5 router.

4

This is the Complete history of the problem.


I use eoip runnels often and never have had problems with them.
Recently I created on which did not transport data.
The tunnel was from a CCR1072 across an x86 with ROS to another x86 ROS router.
When I could not get the EOIP tunnel moving traffic I created VLANS to attempt to accomplish the same thing.
VLANS would not work either.

After much testing and experimenting I removed the vlans and tunnels then, found that if I MAC ping the CCR from the x86 (connected through sfp Direct Connect cable) and set the packet size, the maximum size I have success is 498 bytes.

If I do the same using IP, there is no problem with a packet size of 1500 bytes (my MTU on all interfaces is 1500).
Also Mac or IP from CCR to x86 (opposite direction) there is no problem with a 1500 bytes packet.

The x86 ROS does not display the same issue across the ether ports, only the sfp ports.