I have this scenario and trying to configure `vPC` for Cisco ASA 5585 (Active-Standby) 

[![enter image description here][1]][1] 


  [1]: https://i.sstatic.net/Vp7aK.png


Nexus vPC config:

    interface port-channel1
      switchport mode trunk
      switchport trunk allowed vlan 10
      speed 10000
      mtu 9216
      vpc 1


Nexus vPC output

    # show vpc brief
    Legend:
                    (*) - local vPC is down, forwarding via vPC peer-link
    
    vPC domain id                     : 1
    Peer status                       : peer adjacency formed ok
    vPC keep-alive status             : peer is alive
    Configuration consistency status  : success
    Per-vlan consistency status       : success
    Type-2 consistency status         : success
    vPC role                          : primary
    Number of vPCs configured         : 3
    Peer Gateway                      : Enabled
    Dual-active excluded VLANs        : -
    Graceful Consistency Check        : Enabled
    Auto-recovery status              : Enabled, timer is off.(timeout = 240s)
    Delay-restore status              : Timer is off.(timeout = 30s)
    Delay-restore SVI status          : Timer is off.(timeout = 10s)
    
    vPC Peer-link status
    ---------------------------------------------------------------------
    id   Port   Status Active vlans
    --   ----   ------ --------------------------------------------------
    1    Po999  up     10,100
    
    vPC status
    ----------------------------------------------------------------------
    id   Port   Status Consistency Reason                     Active vlans
    --   ----   ------ ----------- ------                     ------------
    1    Po1    up     success     success                    10


Cisco ASA config:

    # sh run int po1
    !
    interface Port-channel1
     lacp max-bundle 8
     no nameif
     no security-level
     no ip address


interface TenGigabitEthernet0/8
 channel-group 1 mode active
 no nameif
 no security-level
 no ip address

!
interface TenGigabitEthernet0/9
 channel-group 1 mode active
 no nameif
 no security-level
 no ip address

Port-channel summary 

    # show port-channel summary
    Flags:  D - down        P - bundled in port-channel
            I - stand-alone s - suspended
            H - Hot-standby (LACP only)
            U - in use      N - not in use, no aggregation/nameif
            M - not in use, no aggregation due to minimum links not met
            w - waiting to be aggregated
    Number of channel-groups in use: 1
    Group  Port-channel  Protocol  Span-cluster  Ports
    ------+-------------+---------+------------+------------------------------------
    1      Po1(N)            LACP          No     Te0/8(P)   Te0/9(P)

# Question: 

- Why port channel showing `Po1(N)` `N - not in use, no aggregation/nameif`? 

- How vPC work in Active-Standby mode? 

- I haven't see any document related vPC with ASA so far so does this solution going to work or i am wasting my time?

I found link here but not useful: https://www.fir3net.com/Switches/Cisco/design-caveats-active-standby-network-devices-connected-via-vpc.html