I am using RB4011iGS+ I want to use VLAN 1 as a data VLAN on the cisco switch and on the Mikrotik router. I am not able to ping the Mikrotik router VLAN1 interface from the Cisco switch. When I changed the VLAN from VLAN1 to any other VLAN number ping is working.
Are there any restrictions for VLAN1 on the Mikrotik router?
Check to see if VLAN 1 is the native (untagged) VLAN on the Cisco switch. It’s possible that the Cisco side is untagged for VLAN1 and the MikroTik side is tagged. In that case you can set the native VLAN on that port in the Cisco switch to a placeholder VLAN like 777. That will force VLAN 1 to be tagged.
Then cisco is the problem. I use MT with every other brand of switch where vlan1 us untagged on every port by default and it is only removed for access ports (or hybrid ports) where one needs to change the default pvid of 1 to whatever the access port is.
For tagged ports one leaves the pvid of 1 in place and only need to tag the port with tagged vlans.
For MT devices, the vlan1 is the bridge default vlan which is left as is (the default). NO DATA SHOULD RUN through vlan1.
If you cant do that with Crisco , then thrown the hunk of junk away.
That is just your opinion. It is perfectly possible to use VLAN 1 untagged or tagged on Mikrotiks - you just have to be aware that Mikrotik vlan-aware bridge and bridge ports default to VLAN 1 untagged, so you reconfigure them as necessary. It is usually other manufacturers who restrict VLAN 1 to being untagged only.
I do use VLAN (and VLAN1) with hEX RB750G r3 and cisco WS-C3560CX-12PC-S without any problem.
Without posting config from both devices its hard to help out.