LTE passthrough not working on RB411U

RouterOS General
1

I have bought to older RB411U LTE card R11e-LTE and I’m trying to setup passthrough to ethernet device behind RB411U (Cisco ISR 891). I have configured APN with passthrough mode to ethernet1
[admin@MikroTik] > interface lte print
Flags: X - disabled, R - running
0 R name=“lte1” mtu=1480 mac-address=AC:FF:FF:00:00:00 apn-profiles=default network-mode=gsm,3g,lte
[admin@MikroTik] > interface lte apn print
Flags: * - default
0 * name=“default” apn=“internet” use-peer-dns=yes add-default-route=yes default-route-distance=2 passthrough-interface=E1VLAN12 passthrough-mac=auto
[admin@MikroTik] >
On Cisco router I have configured DHCP client. Cisco gets IP address from LTE network with mask /30 (other usable address is on RB411U for example address 100.87.193.141 is on Cisco router and address 100.87.193.142 is on RB411U) and default route on Cisco router is pointed to RB411U address.
S* 0.0.0.0/0 [254/0] via 100.87.193.142
100.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
C 100.87.193.140/30 is directly connected, FastEthernet8.12
L 100.87.193.141/32 is directly connected, FastEthernet8.12
S 100.87.193.142/32 [254/0] via 100.87.193.142, FastEthernet8.12
But I’m not able to ping from Cisco to any destination and get ICMP code destination unreachable from RB411U. When I look to RB411U routing table there is no default route, so I added it manualy pointing to interface lte1, but it didin’t solved my problem. Any idea how to get passthrough configuration working?

Standard LTE connection with IP address on RB411U and NAT is working without problem.

2

Did you ever get to the bottom of this?

Ive got exact same issue with SXT LTE and RB3011.

RB3011 gets WAN address from LTE via dhcp-client but the connection isnt usable and pings fail with host unreachable.

3

sorry to raise an old issue, but did you guys get this working?
I seem to be seeing something similar with and RB4011 (on 6.43.12) with and EoIP tunnel to an WAP LTE (on 6.44.1)

LTE is up according to the WAP
tunnel is up
i am getting an IP address over the eoip tunnel on the RB4011
… but nothing seems to be working

any hints and tips?

4

Did you ever get to the bottom of why this doesn’t work?

I changed my provider just in case it was sim-card related issue (clutching at straws I know) but I get same issue.

I’ve had this device for a while now and tried every way to get this to work but never been able to use bridge mode.

5

I use LHGR and SXTR with passthrough with vlans base, works.
What is your problem exacly ?