FastNetMon features complete support for GoBGP for BGP announce and includes compatible GoBGP in our official packages.
Note: For FastNetMon Advanced edition, please use this guide instead.
We have the following configuration options for GoBGP in /etc/fastnetmon.conf:
gobgp = on gobgp_next_hop = 1.2.3.4 gobgp_announce_host = on gobgp_announce_whole_subnet = off gobgp_community_host = 65001:666 gobgp_community_subnet = 65001:777 # Configuration for IPv6 announces gobgp_next_hop_ipv6 = 100::1 gobgp_next_hop_host_ipv6 = 100::1 gobgp_next_hop_subnet_ipv6 = 100::1 gobgp_announce_host_ipv6 = on # Not supported yet gobgp_announce_whole_subnet_ipv6 = off gobgp_community_host_ipv6 = 65001:666 gobgp_community_subnet_ipv6 = 65001:777
To establish a BGP session with your network equipment, you need to create a configuration for GoBGP in /etc/gobgpd.conf file:
[global.config]
as = 65001
router-id = "192.168.1.134"
[[neighbors]]
[neighbors.config]
neighbor-address = "192.168.1.188"
peer-as = 65001
[neighbors.ebgp-multihop.config]
enabled = true
[[neighbors.afi-safis]]
[neighbors.afi-safis.config]
afi-safi-name = "ipv4-unicast"
[[neighbors.afi-safis]]
[neighbors.afi-safis.config]
afi-safi-name = "ipv6-unicast"
[neighbors.transport.config]
local-address = "192.168.1.134"
Run it:
sudo /opt/fastnetmon.community/libraries/gobgp_3_12_0/gobgpd -f /etc/gobgpd.conf
After that, you will see the following log message when the BGP session is established successfully:
{"Key":"192.168.1.188","State":"BGP_FSM_OPENCONFIRM","Topic":"Peer","level":"info","msg":"Peer Up","time":"2020-05-24T14:42:12+01:00"}
You may check neighbor’s status the following way:
/opt/fastnetmon.community/libraries/gobgp_3_12_0/gobgp nei 192.168.1.188
Example output:
BGP neighbor is 192.168.1.188, remote AS 65001
BGP version 4, remote router ID 192.168.1.188
BGP state = ESTABLISHED, up for 00:01:24
BGP OutQ = 0, Flops = 0
Hold time is 90, keepalive interval is 30 seconds
Configured hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
multiprotocol:
ipv4-unicast: advertised and received
ipv6-unicast: received
route-refresh: advertised and received
4-octet-as: advertised and received
Message statistics:
Sent Rcvd
Opens: 1 1
Notifications: 0 0
Updates: 0 0
Keepalives: 3 4
Route Refresh: 0 0
Discarded: 0 0
Total: 4 5
Route statistics:
Advertised: 0
Received: 0
Accepted: 0
Check announced routes:
/opt/fastnetmon.community/libraries/gobgp_3_12_0/gobgp global rib
Network Next Hop AS_PATH Age Attrs
*> 192.168.1.1/32 0.0.0.0 00:00:08 [{Origin: ?}]
Announce custom route:
/opt/fastnetmon.community/libraries/gobgp_3_12_0/gobgp global rib add 10.33.0.0/32 -a ipv4
Withdraw route:
/opt/fastnetmon.community/libraries/gobgp_3_12_0/gobgp global rib del 10.33.0.0/32 -a ipv4
To control BGP announces directly from FastNetMon, you may consider using the command line tool.