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fredericoafd
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RouterOS V7 does not work BGP multihop peer
I had a multihop MGP session working on routerOS 6, after I migrated to version 7, I reconfigured the multihop BGP session but it doesn't go up. Do you know if there is anything else that needs to be configured for multihop sessions on RouterOS v7?
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danmikrotik
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Re: RouterOS V7 does not work BGP multihop peer
I had the same issue. BFD was the cause. Confirmed working on 7.11.2.
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fredericoafd
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Re: RouterOS V7 does not work BGP multihop peer
Have similar problem in my EVE-NG lab. When i try to establish BGP connection between two adjacent routers, for local. and remote. addresses I'm using routers loopbacks, as result BGP sessions in down and /routing/bfd/session print show:
@R1] > routing/bfd/session/print
Flags: U - up, I - inactive
0 I ;;; BFD forbidden for destination address
multihop=yes vrf=main remote-address=10.0.0.2 local-address=10.0.0.1
desired-tx-interval=0ms required-min-rx=0ms multiplier=0
1 U multihop=no vrf=main remote-address=192.168.0.2%ether3
local-address=192.168.0.1 state=up state-changes=2 uptime=8s
desired-tx-interval=200ms actual-tx-interval=200ms required-min-rx=200ms
remote-min-rx=200ms remote-min-tx=200ms multiplier=5 hold-time=1s
packets-rx=46 packets-tx=43
Adding and specifying allowed address-list under bfd configuration doesn't help neither
But when i configure bgp session with ip which is configured directly on interface, the bgp and bfd is up
Can anyone confirm, that this is expected behaviour in ROS7.11.2 or I'm doing something wrong?
@R1] > routing/bfd/session/print
Flags: U - up, I - inactive
0 I ;;; BFD forbidden for destination address
multihop=yes vrf=main remote-address=10.0.0.2 local-address=10.0.0.1
desired-tx-interval=0ms required-min-rx=0ms multiplier=0
1 U multihop=no vrf=main remote-address=192.168.0.2%ether3
local-address=192.168.0.1 state=up state-changes=2 uptime=8s
desired-tx-interval=200ms actual-tx-interval=200ms required-min-rx=200ms
remote-min-rx=200ms remote-min-tx=200ms multiplier=5 hold-time=1s
packets-rx=46 packets-tx=43
Adding and specifying allowed address-list under bfd configuration doesn't help neither
But when i configure bgp session with ip which is configured directly on interface, the bgp and bfd is up
Can anyone confirm, that this is expected behaviour in ROS7.11.2 or I'm doing something wrong?
Re: RouterOS V7 does not work BGP multihop peer
I'm having the same issue with ROS 7.11.2.
Multihop BGP session is not established when I try to enable BFD for that session. BFD shows BFD forbidden for destination address. In my case the IP address is on the physical interface (not on loopback), but it is a different address because of the multihop BGP. I've tried adding both the remote IP address and the gateway to the BFD address-list, but no luck.
Multihop BGP session is not established when I try to enable BFD for that session. BFD shows BFD forbidden for destination address. In my case the IP address is on the physical interface (not on loopback), but it is a different address because of the multihop BGP. I've tried adding both the remote IP address and the gateway to the BFD address-list, but no luck.
Re: RouterOS V7 does not work BGP multihop peer
Show your bfd config.Adding and specifying allowed address-list under bfd configuration doesn't help neither
But when i configure bgp session with ip which is configured directly on interface, the bgp and bfd is up
Re: RouterOS V7 does not work BGP multihop peer
Hello mrz!
I will post entire configurations of both routers and here it is.
I will post entire configurations of both routers and here it is.
Code: Select all
# ROUTER1
/interface bridge
add name=loopback0 protocol-mode=none
/interface ethernet
set [ find default-name=ether1 ] advertise=10M-half,10M-full,100M-half,100M-full \
disable-running-check=no
set [ find default-name=ether2 ] advertise=10M-half,10M-full,100M-half,100M-full \
disable-running-check=no
set [ find default-name=ether3 ] advertise=10M-half,10M-full,100M-half,100M-full \
disable-running-check=no
set [ find default-name=ether4 ] advertise=10M-half,10M-full,100M-half,100M-full \
disable-running-check=no
set [ find default-name=ether5 ] advertise=10M-half,10M-full,100M-half,100M-full \
disable-running-check=no
/routing ospf instance
add disabled=no name=ospf-instance-v2 router-id=10.0.0.1
/routing ospf area
add comment=backbone_v2 disabled=no instance=ospf-instance-v2 name=area0
/ip address
add address=10.0.0.1 interface=loopback0 network=10.0.0.1
add address=192.168.1.1/30 comment=to-r4 interface=ether1 network=192.168.1.0
add address=192.168.2.1/30 comment=to-r3 interface=ether2 network=192.168.2.0
add address=192.168.0.1/30 comment=to-r2-rr interface=ether3 network=192.168.0.0
/ip dhcp-client
add interface=ether1
/ip firewall address-list
add address=192.168.0.0/16 list=bfd-allowed
add address=10.0.0.0/24 list=bfd-allowed
/routing bfd configuration
add address-list=bfd-allowed disabled=no forbid-bfd=no interfaces=all
/routing bgp connection
add as=65000 cluster-id=1.1.1.1 connect=yes listen=yes local.address=10.0.0.1 \
.role=ibgp name=to-r2-rr remote.address=10.0.0.2 .as=65000 router-id=10.0.0.1 \
use-bfd=yes
add as=65000 connect=yes listen=yes local.address=10.0.0.1 .role=ibgp-rr name=\
to-r3-rr-client remote.address=10.0.0.3 .as=65000 router-id=10.0.0.1 use-bfd=\
yes
add as=65000 connect=yes listen=yes local.address=10.0.0.1 .role=ibgp-rr name=\
to-r4-rr-client remote.address=10.0.0.4 .as=65000 router-id=10.0.0.1 use-bfd=\
yes
/routing ospf interface-template
add area=area0 disabled=no interfaces=loopback0 passive type=ptp
add area=area0 disabled=no interfaces=ether1 type=ptp use-bfd=yes
add area=area0 disabled=no interfaces=ether2 type=ptp use-bfd=yes
add area=area0 disabled=no interfaces=ether3 type=ptp use-bfd=yes
/system identity
set name=R1
[admin@R1] > routing/bfd/session/print
Flags: U - up, I - inactive
0 I ;;; BFD forbidden for destination address
multihop=yes vrf=main remote-address=10.0.0.2 local-address=10.0.0.1
desired-tx-interval=0ms required-min-rx=0ms multiplier=0
1 I ;;; BFD forbidden for destination address
multihop=yes vrf=main remote-address=10.0.0.3 local-address=10.0.0.1
desired-tx-interval=0ms required-min-rx=0ms multiplier=0
2 I ;;; BFD forbidden for destination address
multihop=yes vrf=main remote-address=10.0.0.4 local-address=10.0.0.1
desired-tx-interval=0ms required-min-rx=0ms multiplier=0
3 U multihop=no vrf=main remote-address=192.168.1.2%ether1
local-address=192.168.1.1%ether1 state=up state-changes=2 uptime=5m59s
desired-tx-interval=200ms actual-tx-interval=200ms required-min-rx=200ms
remote-min-rx=200ms remote-min-tx=200ms multiplier=5 hold-time=1s
packets-rx=2082 packets-tx=2684
4 U multihop=no vrf=main remote-address=192.168.2.2%ether2
local-address=192.168.2.1%ether2 state=up state-changes=2 uptime=5m8s
desired-tx-interval=200ms actual-tx-interval=200ms required-min-rx=200ms
remote-min-rx=200ms remote-min-tx=200ms multiplier=5 hold-time=1s
packets-rx=1786 packets-tx=2442
5 U multihop=no vrf=main remote-address=192.168.0.2%ether3
local-address=192.168.0.1%ether3 state=up state-changes=1 uptime=14m42s
desired-tx-interval=200ms actual-tx-interval=200ms required-min-rx=200ms
remote-min-rx=200ms remote-min-tx=200ms multiplier=5 hold-time=1s
packets-rx=5123 packets-tx=5124
#ROUTER2
/interface bridge
add name=loopback0 protocol-mode=none
/interface ethernet
set [ find default-name=ether1 ] advertise=10M-half,10M-full,100M-half,100M-full \
disable-running-check=no
set [ find default-name=ether2 ] advertise=10M-half,10M-full,100M-half,100M-full \
disable-running-check=no
set [ find default-name=ether3 ] advertise=10M-half,10M-full,100M-half,100M-full \
disable-running-check=no
set [ find default-name=ether4 ] advertise=10M-half,10M-full,100M-half,100M-full \
disable-running-check=no
set [ find default-name=ether5 ] advertise=10M-half,10M-full,100M-half,100M-full \
disable-running-check=no
/routing ospf instance
add disabled=no name=ospf-instance-v2 router-id=10.0.0.2
/routing ospf area
add comment=backbone_v2 disabled=no instance=ospf-instance-v2 name=area0
/ip address
add address=10.0.0.2 interface=loopback0 network=10.0.0.2
add address=192.168.4.1/30 comment=to-r3 interface=ether1 network=192.168.4.0
add address=192.168.3.1/30 comment=to-r4 interface=ether2 network=192.168.3.0
add address=192.168.0.2/30 comment=to-r1-rr interface=ether3 network=192.168.0.0
/ip dhcp-client
add interface=ether1
/ip firewall address-list
add address=192.168.0.0/16 list=bfd-allowed
add address=10.0.0.0/24 list=bfd-allowed
/routing bfd configuration
add address-list=bfd-allowed disabled=no forbid-bfd=no interfaces=all
/routing bgp connection
add as=65000 cluster-id=1.1.1.1 connect=yes listen=yes local.address=10.0.0.2 \
.role=ibgp name=to-r1-rr remote.address=10.0.0.1 .as=65000 router-id=10.0.0.2 \
use-bfd=yes
add as=65000 connect=yes listen=yes local.address=10.0.0.2 .role=ibgp-rr name=\
to-r3-rr-client remote.address=10.0.0.3 .as=65000 router-id=10.0.0.2 use-bfd=\
yes
add as=65000 connect=yes listen=yes local.address=10.0.0.2 .role=ibgp-rr name=\
to-r4-rr-client remote.address=10.0.0.4 .as=65000 router-id=10.0.0.2 use-bfd=\
yes
/routing ospf interface-template
add area=area0 disabled=no interfaces=loopback0 passive type=ptp
add area=area0 disabled=no interfaces=ether1 type=ptp use-bfd=yes
add area=area0 disabled=no interfaces=ether2 type=ptp use-bfd=yes
add area=area0 disabled=no interfaces=ether3 type=ptp use-bfd=yes
/system identity
set name=R2
[admin@R2] > routing/bfd/session/print
Flags: U - up, I - inactive
0 I ;;; BFD forbidden for destination address
multihop=yes vrf=main remote-address=10.0.0.1 local-address=10.0.0.2
desired-tx-interval=0ms required-min-rx=0ms multiplier=0
1 I ;;; BFD forbidden for destination address
multihop=yes vrf=main remote-address=10.0.0.3 local-address=10.0.0.2
desired-tx-interval=0ms required-min-rx=0ms multiplier=0
2 I ;;; BFD forbidden for destination address
multihop=yes vrf=main remote-address=10.0.0.4 local-address=10.0.0.2
desired-tx-interval=0ms required-min-rx=0ms multiplier=0
3 U multihop=no vrf=main remote-address=192.168.4.2%ether1
local-address=192.168.4.1%ether1 state=up state-changes=2 uptime=16m21s
desired-tx-interval=200ms actual-tx-interval=200ms required-min-rx=200ms
remote-min-rx=200ms remote-min-tx=200ms multiplier=5 hold-time=1s
packets-rx=5701 packets-tx=6501
4 U multihop=no vrf=main remote-address=192.168.3.2%ether2
local-address=192.168.3.1%ether2 state=up state-changes=2 uptime=17m12s
desired-tx-interval=200ms actual-tx-interval=200ms required-min-rx=200ms
remote-min-rx=200ms remote-min-tx=200ms multiplier=5 hold-time=1s
packets-rx=5991 packets-tx=6728
5 U multihop=no vrf=main remote-address=192.168.0.1%ether3
local-address=192.168.0.2%ether3 state=up state-changes=2 uptime=25m56s
desired-tx-interval=200ms actual-tx-interval=200ms required-min-rx=200ms
remote-min-rx=200ms remote-min-tx=200ms multiplier=5 hold-time=1s
packets-rx=9030 packets-tx=9035 Show your bfd config.Adding and specifying allowed address-list under bfd configuration doesn't help neither
But when i configure bgp session with ip which is configured directly on interface, the bgp and bfd is up
Re: RouterOS V7 does not work BGP multihop peer
Do not specify interface if you wan to match multihop sessions.
Re: RouterOS V7 does not work BGP multihop peer
Thank you mrz, it helped, bfd and bgp sessions are up now.
Code: Select all
[admin@R1] /routing/bfd> session/print
Flags: U - up, I - inactive
0 U multihop=yes vrf=main remote-address=10.0.0.2 local-address=10.0.0.1 state=up
state-changes=2 uptime=48s desired-tx-interval=200ms actual-tx-interval=200ms
required-min-rx=200ms remote-min-rx=200ms remote-min-tx=200ms multiplier=5
hold-time=1s packets-rx=280 packets-tx=277
Do not specify interface if you wan to match multihop sessions.
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