wAP and EIP -- strange problem

RouterOS General
1

I’ve recently bought few wAP LTE kit (RBwAPR-2nD&R11e-LTE) to provide backup link for some remote offices and I have a problem with eoip tunnels.

We have our own LTE APN anr wAP is used as following (schematic below):

We have an APN router (mikrotik RB3011) at main office runnig OSPF and connected to the LTE operator trough fiber link. It is then connected to the LTE network via GRE tunnel.

There is an EoIP tunnel over LTE between the RB3011 and wAP, on RB3011 the EoIP interface has an IP address on wAP side EoIP interface is bridged to the ether1 and then connected to other mikrotik router which is also running OSPF.

Now, if I ping the other end of the EoIP tunnel I get responses for few minutes then no response for another few minutes and again the same. There is no pattern. Sometimes ping get trough for 1 minute sometimes for 30 minutes and then no communication for few hours. At the same time L2 and OSPF communication seems to be ok. There is active adjacency, hello packet travel across the tunnel normally and I can connect to the other end of the tunnel using mac-telnet. I can also see LLDP packet in wireshark.


The same configuration works with SXT-LTE flawlesly. I’ve tried latest current and bugfix firmware on wAP. APN router (RB3011) is on 6.35.4


https://imgur.com/a/MFsRdgi

2

is the LTE connection going down at the time when the ping is not working?
What is the firmware version for the LTE card?

3

No, I think the problem is somewhere in the bridge/ethernet part, becuse if I add address to bridge I can ping/btest from and to it without any problem

4

you could try to upgrade the LTE firmware to v008 but the firmware upgrade should be done via active LTE connection.
See attachment how to do that. Please do that fromt he ethernet side of the WAP LTE board.
AT_Upgrade(EN).txt (1.05 KB)

5

I’ll try but I don’t see a problem with lte connection. LTE communication is OK, if i configure NAT on wAP also everything is OK. The problem occurs only when I try to bridge EoIP tunnel over LTE with the ethernet port.

6

IT WORKS! Thanks a lot.

7

Hello, uldis

I have a similar strange problem with wAP and EoIP

We build EoIP between Central Office router RB1100AHx2 and Remote Office wAP

wAP recieved “white” ip address from LTE and build EoIP to Central Office “white” address


Here is some config from wAP:


/interface bridge
add fast-forward=no name=bridge1

/interface eoip
add local-address=(LTE assigned “white” address) name=eoip30 remote-address=(RB1100AHx2 “white” address) tunnel-id=30

/interface lte apn
set [ find default=yes ] apn=(apn name)

/interface bridge port
add bridge=bridge1 interface=ether1
add bridge=bridge1 interface=eoip30

Here is some config from RB1100 side:


/interface eoip
add local-address=(RB1100AHx2 “white” address) name=eoip30 remote-address=(LTE assigned “white” address) tunnel-id=30

/ip address
add address=(> gateway ip address for RO> ) interface=eoip30 network=(> ip address for RO> )

There is no ping from wAP ip address for RO to RB1100 gateway ip address for RO and back, BUT, when i start Torch at RO EoIP interface - ping appears!

Simpe NAT works for wAP too.


Such a scheme with EoIP has a long time used by us and works perfectly for SXT-LTE, but dont work for wAP.

I upgraded LTE firmware to v008, but it did not help either.

RB1100AHx2 fw version is 6.40.4 and wAP fw version is 6.42.5

Pls advice.

8

SOLVED by disabling fast path on bridge!