Technical Tip: Notification Error Message: (OPEN Message Error/Bad BGP Identifier)
Description
The BGP neighbourship will stay in Idle and showing the below error when '# get router info bgp neighbors' is executed.
Notification Error Message: (OPEN Message Error/Bad BGP Identifier.)
Solution
This error will occur when both BGP neighbors having the same router ID.
The BGP neighbourship will stay in Idle and showing the below error when '# get router info bgp neighbors' is executed.
Notification Error Message: (OPEN Message Error/Bad BGP Identifier.)
Solution
This error will occur when both BGP neighbors having the same router ID.
'FGT1' Configuration.
For address family: IPv4 Unicast.
For address family: IPv6 Unicast.
For address family: IPv4 Unicast.
FGT1 # show router bgp
# config router bgp
set as 64512
set router-id 10.0.0.1 <-----
# config neighbor
edit "10.0.0.2"
set remote-as 64513
next
end
FGT1# get router info bgp summary
VRF 0 BGP router identifier 10.0.0.1, local AS number 64512
BGP table version is 1
0 BGP AS-PATH entries
0 BGP community entries
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.0.0.2 4 64513 175 427 0 0 0 never Idle
Total number of neighbors 1
FGT1# get router info bgp neighbors
VRF 0 neighbor table:
BGP neighbor is 10.0.0.2, remote AS 64513, local AS 64512, external link
BGP version 4, remote router ID 0.0.0.0
BGP state = Idle
Last read 00:00:02, hold time is 180, keepalive interval is 60 seconds
Configured hold time is 180, keepalive interval is 60 seconds
Received 177 messages, 1 notifications, 0 in queue
Sent 267 messages, 167 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 30 seconds
For address family: IPv4 Unicast.
BGP table version 1, neighbor version 0
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
0 accepted prefixes, 0 prefixes in rib
0 announced prefixes
For address family: IPv6 Unicast.
BGP table version 1, neighbor version 0
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
0 accepted prefixes, 0 prefixes in rib
0 announced prefixes
Connections established 3; dropped 3'FGT2' Configuration.
Last Reset: 00:00:02, due to BGP Notification sent
Notification Error Message: (OPEN Message Error/Bad BGP Identifier.) <-----
FGT2# show router bgp
config router bgp
set as 64513
set router-id 10.0.0.1 <-----
config neighbor
edit "10.0.0.1"
set remote-as 64512
next
end
FGT2# get router info bgp summary
VRF 0 BGP router identifier 10.0.0.1, local AS number 64513
BGP table version is 1
0 BGP AS-PATH entries
0 BGP community entries
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.0.0.1 4 64512 204 486 0 0 0 never Active
Total number of neighbors 1
FGT2# get router info bgp neighbors
VRF 0 neighbor table:
BGP neighbor is 10.0.0.1, remote AS 64512, local AS 64513, external link
BGP version 4, remote router ID 0.0.0.0
BGP state = Idle
Last read 00:00:03, hold time is 180, keepalive interval is 60 seconds
Configured hold time is 180, keepalive interval is 60 seconds
Received 203 messages, 2 notifications, 0 in queue
Sent 296 messages, 192 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 30 seconds
For address family: IPv4 Unicast.
BGP table version 1, neighbor version 0For address family: IPv6 Unicast.
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
0 accepted prefixes, 0 prefixes in rib
0 announced prefixes
BGP table version 1, neighbor version 0Note.
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
0 accepted prefixes, 0 prefixes in rib
0 announced prefixes
Connections established 3; dropped 3
Last Reset: 00:00:03, due to BGP Notification sent
Notification Error Message: (OPEN Message Error/Bad BGP Identifier.) <-----
The Router ID is the same on both the firewalls.
Changed the router id to 10.0.0.2 on 'FGT2'.
For address family: IPv4 Unicast.
Changed the router id to 10.0.0.2 on 'FGT2'.
FGT2# show router bgp
config router bgp
set as 64513
set router-id 10.0.0.2
config neighbor
edit "10.0.0.2"
set remote-as 64512
next
end
FGT1# execute router clear bgp ip 10.0.0.2 <----- Clear the neighbourship.
FGT1# get router info bgp summary
VRF 0 BGP router identifier 10.0.0.1, local AS number 64512
BGP table version is 1
0 BGP AS-PATH entries
0 BGP community entries
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.0.0.2 4 64513 241 580 0 0 0 00:01:14 0
Total number of neighbors 1
FGT1# get router info bgp neighbors
VRF 0 neighbor table:
BGP neighbor is 10.0.0.2, remote AS 64513, local AS 64512, external link
BGP version 4, remote router ID 10.0.0.2
BGP state = Established, up for 00:01:20
Last read 00:00:33, hold time is 180, keepalive interval is 60 seconds
Configured hold time is 180, keepalive interval is 60 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Unicast: advertised and received
Address family IPv6 Unicast: advertised and received
Received 240 messages, 1 notifications, 0 in queue
Sent 358 messages, 222 notifications, 0 in queue
Route refresh request: received 0, sent 6
Minimum time between advertisement runs is 30 seconds
For address family: IPv4 Unicast.
BGP table version 1, neighbor version 0For address family: IPv6 Unicast.
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
0 accepted prefixes, 0 prefixes in rib
0 announced prefixes
BGP table version 1, neighbor version 0
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
0 accepted prefixes, 0 prefixes in rib
0 announced prefixes
Connections established 7; dropped 6The issue is resolved once changed the different router ID on 'FGT2'.
Local host: 10.0.0.1, Local port: 12741
Foreign host: 10.0.0.2, Foreign port: 179
Nexthop: 10.0.0.1
Nexthop interface: port2
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:01:27, due to BGP Notification sent
Notification Error Message: (CeaseUnspecified Error Subcode) <-----
