Alternativa Errada.
Fonte: http://www.cisco.com/c/en/us/td/docs/ios/iproute_bgp/command/reference/irg_book/irg_bgp4.html
The timers configured for a specific neighbor or peer group override the timers configured for all BGP neighbors using the timers bgpcommand.
When configuring the holdtime argument for a value of less than twenty seconds, the following warning is displayed:
% Warning: A hold time of less than 20 seconds increases the chances of peer flapping
If the minimum acceptable hold-time interval is greater than the specified hold-time, a notification is displayed:
% Minimum acceptable hold time should be less than or equal to the configured hold time
Note When the minimum acceptable hold-time is configured on a BGP router, a remote BGP peer session is established only if the remote peer is advertising a hold-time that is equal to, or greater than, the minimum acceptable hold-time interval. If the minimum acceptable hold-time interval is greater than the configured hold-time, the next time the remote session tries to establish, it will fail and the local router will send a notification stating "unacceptable hold time."
Examples The following example changes the keepalive timer to 70 seconds and the hold-time timer to 210 seconds for the BGP peer 192.168.47.0:
router bgp 109
neighbor 192.168.47.0 timers 70 210
The following example changes the keepalive timer to 70 seconds, the hold-time timer to 130 seconds, and the minimum hold-time interval to 100 seconds for the BGP peer 192.168.1.2:
router bgp 45000
neighbor 192.168.1.2 timers 70 130 100