EoIP blocks ARP ??

RouterOS General
1

Hi.

I have working setup with two MT with EoIP tunnel between them.
But problem is, that ARP doesn’t get thru that tunnel!
If i use VLAN for tunneling, it works fine. Even more, if i use VLAN for a second (to pass ARP) and switch to EoIP, then it still works for couple of minutes (till the end of ARP entry).
And if i add propper ARP entries manualy, it works.

So, the question is, am i doing something wrong (no, i don’t have any firewall rules) or can it be some hardware issue?
And second thing, what is the difference between using VLAN and EoIP?

Thanks!

2
  1. Make sure that ARP has not been disabled on the EoIP/Ethernet interface and bridge interface.
  2. EoIP create Ethernet tunnel over IP, it means Ethernet connection is established between two remote networks.
    VLAN is simply a way of grouping a set of switch ports together so that they form a logical network, separate from any other such group.
3

ARP is enabled. I also tried many combinations with it (proxy-arp, disabled).
I don’t havy any more ideas what can be wrong.

4

Provide us with some details, how ARP does not work for you ?
Post the following menus here,
‘interface eoip export’,
‘interface bridge export’.
Make sure that you are using the latest RouterOS version.

5

MT 1:
/ interface eoip
add name=“eoip_adsl” mtu=1500 mac-address=00:00:5E:00:00:01 arp=disabled remote-address=172.16.20.37 tunnel-id=1
comment=“” disabled=yes

/ interface bridge
add name=“brg_lan” mtu=1500 arp=enabled stp=no priority=32768 ageing-time=5m forward-delay=2s
garbage-collection-interval=4s hello-time=2s max-message-age=20s comment=“” disabled=no
add name=“brg_adsl” mtu=1500 arp=disabled stp=no priority=32768 ageing-time=5m forward-delay=15s
garbage-collection-interval=5s hello-time=2s max-message-age=20s comment=“” disabled=no
/ interface bridge port
set eth_lan bridge=brg_lan priority=128 path-cost=10
set eth_adsl bridge=brg_adsl priority=128 path-cost=10
set wlan_wojnowice bridge=none priority=128 path-cost=10
set wlan_kamieniec bridge=none priority=128 path-cost=10
set wlan_nadolice bridge=none priority=128 path-cost=10
set wds_kamieniec bridge=brg_lan priority=128 path-cost=10
set wds_wojnowice bridge=brg_lan priority=128 path-cost=10
set wds_nadolice bridge=brg_lan priority=128 path-cost=10
set eoip_adsl bridge=brg_adsl priority=128 path-cost=10
set vlan1 bridge=brg_adsl priority=128 path-cost=10



MT 2:
/ interface eoip
add name=“eoip_adsl” mtu=1500 mac-address=00:00:5E:00:00:02 arp=disabled remote-address=172.16.20.39 tunnel-id=1
comment=“” disabled=yes

/ interface bridge
add name=“brg_lan” mtu=1500 arp=enabled stp=no priority=32768 ageing-time=5m forward-delay=15s
garbage-collection-interval=5s hello-time=2s max-message-age=20s comment=“” disabled=no
add name=“brg_adsl” mtu=1500 arp=disabled stp=no priority=32768 ageing-time=5m forward-delay=15s
garbage-collection-interval=5s hello-time=2s max-message-age=20s comment=“” disabled=no
/ interface bridge port
set eth_adsl bridge=brg_adsl priority=128 path-cost=10
set eth_lan bridge=brg_lan priority=128 path-cost=10
set ap_dobrzykowice bridge=brg_lan priority=128 path-cost=10
set eoip_adsl bridge=brg_adsl priority=128 path-cost=10
set vlan1 bridge=brg_adsl priority=128 path-cost=10

The EoIP interfaces are intentionaly disabled, because i currently use vlan.
Don’t look at ARP settings, because i’ve arleady tried every posible set (enabled, disabled, proxy…)
Both MT are 2.9.6, is this wrong?

6

there was many updates since 2.9.6, try using 2.9.38 :unamused: