BGP

Juniper.md

@@ -454,3 +454,33 @@ PING 10.0.252.2 (10.0.252.2): 56 data bytes
 round-trip min/avg/max/stddev = 0.572/2.286/13.992/2.207 ms
 ```
 This will send 1000 packets as fast as possible, and will show you packetloss and RTT. While you can ignore RTT, as control plane dont have high priority, packetloss should not be present in any case.
+
+### BGP troubleshooting
+
+If you have BGP session with Ogero, and it is not working, you can check if you have BGP session established by following command:
+
+```
+admin@CORE> 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...
+y.y.y.y               42020          0          0       0       0       1:01 1/1/1/0              0/0/0/0
+```
+If you see "State" column, it should be "Established", if it is not, you have a problem with BGP session.
+
+You can check if you have BGP routes sent by following command:
+
+```
+admin@CORE> show route advertising-protocol bgp y.y.y.y
+inet.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
+  Prefix                  Nexthop              MED     Lclpref    AS path
+* x.y.a.x/22          Self                                    I
+* b.b.b.b/22          Self                                    I
+```
+If you see your prefixes, it means you are sending them to Ogero.
+
+You might use also "show bgp neighbor x.x.x.x" to see more detailed information about BGP session.
+
+###