the following output. 
vPC keep-alive status           : peer is alive 
--Peer is alive for             : (1048732) seconds, (737) msec 
--Send status                   : Success 
--Last send at                  : 2014.05.13 11:35:04 592 ms 
--Sent on interface             : mgmt0 
--Receive status                : Success 
--Last receive at               : 2014.05.13 11:35:04 477 ms 
--Received on interface         : mgmt0 
--Last update from peer         : (0) seconds, (215) msec 
vPC Keep-alive parameters 
--Destination                   : 172.25.109.24 
--Keepalive interval            : 1000 msec 
--Keepalive timeout             : 5 seconds 
--Keepalive hold timeout        : 3 seconds 
--Keepalive vrf                 : management 
--Keepalive udp port            : 3200 
--Keepalive tos                 : 192