— Exhibit —
ar 16 19:12:58.291474 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179
Mar 16 19:12:58.291624 BGP RECV message type 1 (Open) length 59
Mar 16 19:12:58.291688 BGP RECV version 4 as 2 holdtime 90 id 192.168.2.1 parmlen 30
Mar 16 19:12:58.291752 BGP RECV MP capability AFI=1, SAFI=1
Mar 16 19:12:58.291802 BGP RECV Refresh capability, code=128
Mar 16 19:12:58.291850 BGP RECV Refresh capability, code=2
Mar 16 19:12:58.291915 BGP RECV Restart capability, code=64, time=120, flags=
Mar 16 19:12:58.291969 BGP RECV 4 Byte AS-Path capability (65), as_num 2
Mar 16 19:12:58.292385 advertising receiving-speaker only capabilty to neighbor 172.14.10.2
(External AS 2)
Mar 16 19:12:58.292452 bgp_senD. sending 59 bytes to 172.14.10.2 (External AS 2)
Mar 16 19:12:58.292522
Mar 16 19:12:58.292522 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230
Mar 16 19:12:58.292601 BGP SEND message type 1 (Open) length 59
Mar 16 19:12:58.293053 BGP SEND version 4 as 1 holdtime 90 id 192.168.2.1 parmlen 30
Mar 16 19:12:58.293124 BGP SEND MP capability AFI=1, SAFI=1
Mar 16 19:12:58.293173 BGP SEND Refresh capability, code=128
Mar 16 19:12:58.293221 BGP SEND Refresh capability, code=2
Mar 16 19:12:58.293284 BGP SEND Restart capability, code=64, time=120, flags=
Mar 16 19:12:58.293336 BGP SEND 4 Byte AS-Path capability (65), as_num 1
Mar 16 19:12:58.293517 bgp_senD. sending 19 bytes to 172.14.10.2 (External AS 2)
Mar 16 19:12:58.293573
Mar 16 19:12:58.293573 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230
Mar 16 19:12:58.293665 BGP SEND message type 4 (KeepAlive) length 19
Mar 16 19:12:58.296781
Mar 16 19:12:58.296781 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179
Mar 16 19:12:58.296897 BGP RECV message type 4 (KeepAlive) length 19
Mar 16 19:12:58.297451 bgp_senD. sending 19 bytes to 172.14.10.2 (External AS 2)
Mar 16 19:12:58.297528
Mar 16 19:12:58.297528 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230
Mar 16 19:12:58.297600 BGP SEND message type 4 (KeepAlive) length 19
Mar 16 19:12:58.298102 bgp_senD. sending 23 bytes to 172.14.10.2 (External AS 2)
Mar 16 19:12:58.298185
Mar 16 19:12:58.298185 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230
Mar 16 19:12:58.298273 BGP SEND message type 2 (Update) length 23
Mar 16 19:12:58.298322 BGP SEND End of RIB. AFI 1 SAFI 1
Mar 16 19:12:58.301834
Mar 16 19:12:58.301834 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179
Mar 16 19:12:58.301957 BGP RECV message type 4 (KeepAlive) length 19
Mar 16 19:12:58.302034 bgp_read_v4_messagE. done with 172.14.10.2 (External AS 2) received
19 octets 0 updates 0 routes
Mar 16 19:12:58.304594
Mar 16 19:12:58.304594 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179
Mar 16 19:12:58.304702 BGP RECV message type 2 (Update) length 23
Mar 16 19:12:58.304765 BGP RECV End of RIB. AFI 1 SAFI 1
Mar 16 19:12:58.304848 bgp_read_v4_messagE. done with 172.14.10.2 (External AS 2) received
23 octets 1 update 0 routes
Mar 16 19:13:22.968415 bgp_senD. sending 19 bytes to 172.14.10.2 (External AS 2)
Mar 16 19:13:22.968586
Mar 16 19:13:22.968586 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230
Mar 16 19:13:22.968675 BGP SEND message type 4 (KeepAlive) length 19
Mar 16 19:13:26.901339
Mar 16 19:13:26.901339 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179
Mar 16 19:13:26.901464 BGP RECV message type 4 (KeepAlive) length 19
Mar 16 19:13:26.901543 bgp_read_v4_messagE. done with 172.14.10.2 (External AS 2) received
19 octets 0 updates 0 routes
Mar 16 19:13:51.335927 bgp_senD. sending 19 bytes to 172.14.10.2 (External AS 2)
Mar 16 19:13:51.348180
Mar 16 19:13:51.348180 BGP SEND 172.14.10.1+179 -> 172.14.10.2+51230
Mar 16 19:13:51.348296 BGP SEND message type 4 (KeepAlive) length 19
Mar 16 19:13:53.844160
Mar 16 19:13:53.844160 BGP RECV 172.14.10.2+51230 -> 172.14.10.1+179
Mar 16 19:13:53.844329 BGP RECV message type 4 (KeepAlive) length 19
Mar 16 19:13:53.844392 bgp_read_v4_messagE. done with 172.14.10.2 (External AS 2) received
19 octets 0 updates 0 routes
— Exhibit —
Click the Exhibit button.
Looking at the traceoptions output, what is the current keepalive timer set for in BGP?
A.
1 second
B.
10 seconds
C.
30 seconds
D.
90 seconds
30 seconds is the correct answer.
Mar 16 19:12:58.291688 BGP RECV version 4 as 2 holdtime 90 id 192.168.2.1 parmlen 30
The hold time is three times the interval at which keepalive messages are sent.
http://www.juniper.net/techpubs/en_US/junos12.1/topics/reference/configuration-statement/hold-time-edit-protocols-bgp.html
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Or simply check the time stamp between the SEND Keep alives
Mar 16 19:13:22.968675 BGP SEND message type 4 (KeepAlive) length 19
next one in ~ 30 seconds
Mar 16 19:13:51.348296 BGP SEND message type 4 (KeepAlive) length 19
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