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Router Not Learning or Advertising BGP Routes

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Information

 
TitleRouter Not Learning or Advertising BGP Routes
Symptoms
  • No BGP routes in show iproute
  • Peer not learning routes
  • show bgp neighbor detail shows a state of idle, and the last error is bad peer AS 

X460G2-24p-10G4.53 # show bgp neighbor detail

Peer Description :
IBGP Peer : 100.65.0.9 AS : 65000
Enabled : Yes OperStatus : Up
Weight : 1 Shutdown-Priority : 1024
ConnectRetry : 120 MinAsOrig : 5
HoldTimeCfg : 180 KeepaliveCfg : 60
Source Interface : Not configured RRClient : No
EBGP-Multihop : No Remove Private AS : No
BFD : Off BFD Status : Not Required
Capabilities Config : ipv4-unicast,ipv4-multicast,4-Byte-As,route-refresh (old & new)
Policy for NLRI Type ipv4-unicast
In Policy : None
Out Policy : None
NextHopSelf : Disabled Send Communities : No
Soft Input Recfg : Disabled Allow Looped AS-Path: No
Max-Prefix : 2000 Max-Pre Threshold : 75
Max-Pre Teardown : No Max-Pre HoldInterval: None
Max-Pre SendTraps : No
Policy for NLRI Type ipv4-multicast
In Policy : None
Out Policy : None
NextHopSelf : Disabled Send Communities : No
Soft Input Recfg : Disabled Allow Looped AS-Path: No
Policy for NLRI Type vpnv4
In Policy : None
Out Policy : None
NextHopSelf : Disabled Send Communities : Standard, Extended
Soft Input Recfg : Disabled Allow Looped AS-Path: No
Policy for NLRI Type ipv6-unicast
In Policy : None
Out Policy : None
NextHopSelf : Disabled Send Communities : No
Soft Input Recfg : Disabled Allow Looped AS-Path: No
Policy for NLRI Type ipv6-multicast
In Policy : None
Out Policy : None
NextHopSelf : Disabled Send Communities : No
Soft Input Recfg : Disabled Allow Looped AS-Path: No
State : IDLE
FSM Down since : Thu Jun 13 17:33:06 2019
(Duration: 0:0:00:00)
Remote Addr : 203.0.113.9 Local Addr : 0.0.0.0
Remote Port : 0 Local Port : 0
Remote RouterId : 0.0.0.0 Local RouterId : 1.1.1.2
HoldTimeNegotiated : 90 KeepAliveNegotiated : 30
FsmTransitions : 0
InUpdateElapsedTime : 00:00:00:24 InMsgElapsedTime : 0:0:00:24
InUpdates : 0 OutUpdates (in TxQ) : 0 (0)
InTotalMsgs : 4 OutTotalMsgs : 8
InRouteRefreshes : 0 OutRouteRefreshes : 0
Capabilities Tx : None
Capabilities Rx : None
NLRI for the session: None
Last State : OPENCONFIRM Last Event : STOP
LastError : 'Open Message - Bad Peer AS' (TX) on: Thu Jun 13 17:32:39 2019
Environment
  • XOS
  • BladDiamond
  • Summmit
Cause
Incorrect AS number for the peer causing the state to remain idle
Resolution
Configure the correct AS Number
Additional notes
BGP peers will not exchange routes until the state is established

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