Stefan Lieberth

Network Consultant / Solution Architect

Some note on playing around with GOBGP, a new BGP implementation written in Golang.

Interesting to me is the configuration of GOBGP, which uses the the openconfig syntax.

I am sharing my setup, maybe it is useful for others.

For installing go and gobgo, please follow the instructions under:

https://golang.org/doc/install

https://github.com/osrg/gobgp/blob/master/docs/sources/getting-started.md

Please see the snippets below, which injects a IPv4 route on each peer:

Junos VM config:

admin@vMX1> show configuration routing-options

static {

route 192.168.199.0/24 discard;

}

autonomous-system 200;

admin@vMX1> show configuration policy-options policy-statement STATIC-TO-BGP

term ACCEPT-STATIC {

from protocol static;

then accept;

}

admin@vMX1> show configuration protocols bgp

group gpbgp1 {

export STATIC-TO-BGP;

neighbor 192.168.56.1 {

peer-as 100;

}

}

admin@vMX1> show bgp summary

Groups: 1 Peers: 1 Down peers: 0

Table Tot Paths Act Paths Suppressed History Damp State Pending

inet.0

1 1 0 0 0 0

Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...

192.168.56.1 100 78 98 0 4 34 1/1/1/0 0/0/0/0

GOBGP config, program-call and route-injection:

bin sl$ cat gobgpd-configs/gobgpd.yaml

global:

config:

as: 100

router-id: 192.168.56.1

neighbors:

- config:

neighbor-address: 192.168.56.248

peer-as: 200

bin sl$ sudo -E ./gobgpd -t yaml -f gobgpd-configs/gobgpd.yaml

{"level":"info","msg":"gobgpd started","time":"2016-03-07T12:31:49+01:00"}

{"level":"info","msg":"finished reading the config file","time":"2016-03-07T12:31:49+01:00"}

{"level":"info","msg":"Peer 192.168.56.248 is added","time":"2016-03-07T12:31:49+01:00"}

{"Key":"192.168.56.248","State":4,"Topic":"Peer","level":"info","msg":"Peer Up","time":"2016-03-07T12:32:04+01:00“}

Wireshark Trace snapshot