Hello I need help to configure a vlan trunk with a Cisco switch of our ISP.
ISP tells us only a little information about this:
89.xx.xx.81 address of Cisco switch port. It is configured with vlan trunk tag 203 speed / duplex auto
89.xx.xx.82 our WAN router MT

I do not know Cisco IOS anyone has experience on a link like this?

cetalfio

Did the ISP tell you that your traffic will be on VLAN 203?

Ok I've some more information:
ISP tells us only a little information about this:
89.xx.xx.81/29 address of ISP Cisco switch port. It is configured with speed / duplex auto
89.xx.xx.82/29 our WAN our router MT
boths are vlan id=203

I've set:
/interface vlan
add name=vlan203 vlan-id=203 interface=ether1 disabled=no use-service-tag=yes

/ip address
add address=89.xx.xx.82/29 interface=vlan203

/ip route
add gateway=89.xx.xx.81 check-gateway=ping

after that I've 8 static public IP to assign to LAN:
89.xx.xx.10/29

I can't to ping gateway and 8.8.8.8

some idea?

CelticComms, yes our traffic will be through vlan 203

cetalfio

Set use-service-tag=no or uncheck it in Winbox.

Thanks CelticComms for your advice,
until I try to connect with vlan tag=203 I am not able to do a ping on my route ISP.

So I reset my router and did a standard configuration:
89.xx.xx.81/29 is the address of sfp ISP Cisco switch port. It is configured with speed / duplex auto and our route
89.xx.xx.82/29 our sfp1 on router MT

Now I can ping my route but somenting is wrong because I've more more latency from 50ms to 933 ms (1,5 Km fiber link).

cetalfio

I'm not sure what your config is now...... My last post was indicating that you should removea particular setting - not remove the VLAN itself. To present a standard 802.1Q frame you should have use-service-tag=no.

Sure I try to set use-service-tag=no but so I still did not reach the gateway.

So I removed vlan setting and I have defined as my public address static interface SFP1 and I maskerade it for my lan.

In my current configuration I can reach the gateway, but with very high latencies. My isp does not provide me support and I do not know if the latency is due to misconfiguration and / or a problem on the fiber connection or an incompatibility between the two transceivers Cisco for them and MT for me.

cetalfio