I configured a new hardware with RouterOS 2.9.41 and the same configuration that the other MK that works fine.
With the original router all works great, it have RouterOS 2.9.30.
When connect the new hardware with the same configuration, 4 of 6 bgp peer doesn´t established the connection:
07:23:52 route,bgp,info Failed to open TCP connection: No route to host
07:23:52 route,bgp,info RemoteAddr=200.XX.17.1
07:23:52 route,bgp,info RemotePort=179
The configuration is the same just as the other, what could it be ??.
07:23:17 route,bgp,info Failed to open TCP connection: No route to host → What is that? Can you reach the 200.xx.17.1 with ICMP echo request (ping) ? Did you have routing information for that route? /ip route print ? I believe that your router doesn’t know how to reach his BGP neighbor.
Hi,
it looks like you have connection (Layer1,2) problems between two routers?That what i see, is one router with ip address 200.xx.17.1 (which is your production router) and the newest one 200.xx.17.151 which is in same broadcast domain as production router. So there is no routing decisions performed to connect them both , only layer2 ethernet connection must be fine. Can you see the ARP/IP association on both routers? Example: on your production router, try to /ip arp print to see what is in your ARP table. There must be an association with your hardware(MAC) address and the logical one (IP) like the output attached below:
ADDRESS MAC-ADDRESS INTERFACE
0 D 192.168.11.10 00:20:ED:5E:06:25 LAN
Maybe i’m wrong , but it looks like you don’t have layer2 connection between your routers. Maybe they are in different VLAN’s , i don’t know.But your problem is not in BGP protocol, i believe that you experiencing connection problems!
200.XX.17.151 is my production router that work OK
200.XX.17.1 is the router of my provider (PEER1)
I´m trying to change a hardware for a new one and copy the configuration of the production router to this new one (and with which have the problem).
Do you understand me ?.
Yes, I supposed that have layer 1,2 problem, but I can´t troubleshoot the problem !.
Janisk, I didn´t change the ttl, I´m going to try this tomorrow, what value must have ?. Remember that my production router have the ttl=1 and is a copy of them.
The TTL value my friend, is an IP option. You don’t have IP problems. IP operates at layer3 of OSI model,until you have layer1/2 problems, there is nothing you can do with IP. Check your physical connection (wires and switches)
I have one more suspicion, are you sure that logical addresses (IP) are configured on the right ethernet adapters ? I mean , if you have 4 ethernet cards , you may easy getting confused about which one is configured and which one is actually attached to network?
To your other questions , i believe that there’s not IRQ issues , because they can be shared when same kind of hardware is used (ethernet cards)
When monitoring links status I saw “link-ok” and then “no-link” (flaps), I supposed that the problem is the 3COM cards, could it be ??, could be the 2.9.41 version ?.
filter all incoming routes and see if that makes it more stable. maybe you have a looping route or something misconfigured. I’ve seen specific routes cause problems (flaps, etc).
