Hi all. New to Mikrotik, but not new to routing. Trying to learn the nuances of the platform.
I have three router eBGP peers configured as follows, each with their own AS. R2 is the Mikrotik. The others are different vendors.
R1 <-> R2 <-> R3
R1 is originating default and injecting into eBGP. R2, the Mikrotik, is receiving it passing it to R3 with no problems. R1 & R2 are peered over a shared /29, R1 being 192.168.68.209 and R2's being 192.168.68.210.
However R2, the Mikrotik, doesn't seem to want to use the default route learned via BGP. It only works if I configure a static entry with the same info. For example:
Note the static distance, I can ping 1.1.1.1 just fine.
Now, if I make the static distance longer so BGP is selected, it go boom.
Doing more debug, I see strange behavior if I disable the static outright. The BGP route briefly goes 'Active' but then disappears leaving no default route in the FIB.
Then a few moments later...
I've reviewed the route selection documentation and understanding anything that explains the behavior. Where am I going wrong?
I have three router eBGP peers configured as follows, each with their own AS. R2 is the Mikrotik. The others are different vendors.
R1 <-> R2 <-> R3
R1 is originating default and injecting into eBGP. R2, the Mikrotik, is receiving it passing it to R3 with no problems. R1 & R2 are peered over a shared /29, R1 being 192.168.68.209 and R2's being 192.168.68.210.
However R2, the Mikrotik, doesn't seem to want to use the default route learned via BGP. It only works if I configure a static entry with the same info. For example:
Code:
[localadmin@MikroTik] /ip/route> prFlags: D - DYNAMIC; A - ACTIVE; c - CONNECT, s - STATIC, b - BGP, o - OSPFColumns: DST-ADDRESS, GATEWAY, DISTANCE# DST-ADDRESS GATEWAY DISTANCE D b 0.0.0.0/0 192.168.68.209 200 As 0.0.0.0/0 192.168.68.209 10[localadmin@MikroTik] /ip/route> /ping 1.1.1.1 SEQ HOST SIZE TTL TIME STATUS 0 1.1.1.1 56 50 20ms24us 1 1.1.1.1 56 50 19ms960usNow, if I make the static distance longer so BGP is selected, it go boom.
Code:
[localadmin@MikroTik] /ip/route> prFlags: D - DYNAMIC; A - ACTIVE; c - CONNECT, s - STATIC, b - BGP, o - OSPFColumns: DST-ADDRESS, GATEWAY, DISTANCE# DST-ADDRESS GATEWAY DISTANCE DAb 0.0.0.0/0 192.168.68.209 200 s 0.0.0.0/0 192.168.68.209 25[localadmin@MikroTik] /ip/route> /ping 1.1.1.1 SEQ HOST SIZE TTL TIME STATUS 0 1.1.1.1 timeout 1 1.1.1.1 timeoutCode:
[localadmin@MikroTik] /ip/route> print detail where dst-address=0.0.0.0/0Flags: D - dynamic; X - disabled, I - inactive, A - active;c - connect, s - static, r - rip, b - bgp, o - ospf, i - is-is, d - dhcp, v - vpn, m - modem, y - bgp-mpls-vpn;H - hw-offloaded; + - ecmp 0 Xs dst-address=0.0.0.0/0 gateway=192.168.68.209 distance=10 DAb dst-address=0.0.0.0/0 routing-table=main gateway=192.168.68.209 immediate-gw=192.168.68.209%ether1 distance=20 scope=40 target-scope=10 suppress-hw-offload=no Code:
[localadmin@MikroTik] /ip/route> print detail where dst-address=0.0.0.0/0Flags: D - dynamic; X - disabled, I - inactive, A - active;c - connect, s - static, r - rip, b - bgp, o - ospf, i - is-is, d - dhcp, v - vpn, m - modem, y - bgp-mpls-vpn;H - hw-offloaded; + - ecmp 0 Xs dst-address=0.0.0.0/0 gateway=192.168.68.209 distance=10 Statistics: Posted by bdowne01 — Sun Jan 28, 2024 10:09 pm