sh tcp brief all...

be patient... it's bgp, or clear all... i shut down the neighbor...

r1#sh tcp brie all
TCB       Local Address               Foreign Address             (state)
69647A48  172.16.1.1.26322            172.16.1.2.179               ESTAB
6868C0A8  0.0.0.0.179                 172.16.1.2.*                 LISTEN
r1#
*Oct 27 07:28:48: %BGP-3-NOTIFICATION: sent to neighbor 172.16.1.2 4/0 (hold time expired) 0 bytes
r1#
*Oct 27 07:28:48: %BGP-5-NBR_RESET: Neighbor 172.16.1.2 reset (BGP Notification sent)
*Oct 27 07:28:48: %BGP-5-ADJCHANGE: neighbor 172.16.1.2 Down BGP Notification sent
*Oct 27 07:28:48: %BGP_SESSION-5-ADJCHANGE: neighbor 172.16.1.2 IPv4 Unicast topology base removed from session  BGP Notification sent
r1#sh tcp brie all
TCB       Local Address               Foreign Address             (state)
67ECC48C  172.16.1.1.14286            172.16.1.2.179               SYNSENT
6868C0A8  0.0.0.0.179                 172.16.1.2.*                 LISTEN
r1#sh tcp brie all
TCB       Local Address               Foreign Address             (state)
69647A48  172.16.1.1.40204            172.16.1.2.179               CLOSED
696480CC  172.16.1.1.16103            172.16.1.2.179               SYNSENT
6868C0A8  0.0.0.0.179                 172.16.1.2.*                 LISTEN
r1#sh ip bgp summ
BGP router identifier 1.1.1.1, local AS number 100
BGP table version is 3, main routing table version 3

Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
172.16.1.2      4          200       0       0        1    0    0 00:04:07 Active
r1#

then no shut the neighbor...

*Oct 27 07:34:05: %BGP-5-ADJCHANGE: neighbor 172.16.1.2 Up
r1#sh tcp brie all
TCB       Local Address               Foreign Address             (state)
67ECC48C  172.16.1.1.179              172.16.1.2.52928             ESTAB
6868C0A8  0.0.0.0.179                 172.16.1.2.*                 LISTEN
r1#sh ip bgp
BGP table version is 4, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  192.168.1.0      172.16.1.2               0             0 200 i