On our ASA 5545 Cluster, Software Version 9.1(4), the Failover Tracking Interfaces show Unknown (Waiting). When the ethernet cable is pulled on one of the tracking interfaces of the active ASA, failover does not happen.
ASA1# sh failover
Failover On
Failover unit Primary
Failover LAN Interface: failover GigabitEthernet0/7 (up)
Unit Poll frequency 1 seconds, holdtime 15 seconds
Interface Poll frequency 5 seconds, holdtime 25 seconds
Interface Policy 1
Monitored Interfaces 2 of 316 maximum
Version: Ours 9.1(4), Mate 9.1(4)
Last Failover at: 08:00:46 UTC Feb 18 2014
This host: Primary - Active
Active time: 10847 (sec)
slot 0: ASA5545 hw/sw rev (1.0/9.1(4)) status (Up Sys)
Interface outside (83.236.222.116): Unknown (Waiting)
Interface inside (172.17.220.130): Unknown (Waiting)
Interface management (0.0.0.0): Link Down (Not-Monitored)
Other host: Secondary - Standby Ready
Active time: 448 (sec)
slot 0: ASA5545 hw/sw rev (1.0/9.1(4)) status (Up Sys)
Interface outside (0.0.0.0): Unknown (Waiting)
Interface inside (0.0.0.0): Unknown (Waiting)
Interface management (0.0.0.0): Link Down (Not-Monitored)
Stateful Failover Logical Update Statistics
Link : statelink GigabitEthernet0/6 (up)
Stateful Obj xmit xerr rcv rerr
General 5027 0 1536 75
sys cmd 1469 0 1469 0
up time 0 0 0 0
RPC services 0 0 0 0
TCP conn 40 0 0 0
UDP conn 3318 0 61 75
ARP tbl 189 0 3 0
Xlate_Timeout 0 0 0 0
IPv6 ND tbl 0 0 0 0
VPN IKEv1 SA 1 0 1 0
VPN IKEv1 P2 10 0 1 0
VPN IKEv2 SA 0 0 0 0
VPN IKEv2 P2 0 0 0 0
VPN CTCP upd 0 0 0 0
VPN SDI upd 0 0 0 0
VPN DHCP upd 0 0 0 0
SIP Session 0 0 0 0
Route Session 0 0 0 0
User-Identity 0 0 1 0
CTS SGTNAME 0 0 0 0
CTS PAC 0 0 0 0
TrustSec-SXP 0 0 0 0
IPv6 Route 0 0 0 0
Logical Update Queue Information
Cur Max Total
Recv Q: 0 17 12731
Xmit Q: 0 2 13147
