[c-nsp] ISIS / NSF IOS XR

[Atif Sid]

 I configured NSF under ISIS initially them removed it. Still shows NSF
'YES'; anyone seen this ? restarted ISIS process, cleared it nothing

This is IOS XR 3.6.1 and 3.6.0 both same condition.

RP/0/9/CPU0:P1#sh isis adjacency
IS-IS NP Level-2 adjacencies:
System Id      Interface        SNPA           State Hold Changed  NSF BFD
P2             Gi0/1/1/8        *PtoP*         Up    27   01:31:58 Yes None
PE1            Gi0/1/1/0        *PtoP*         Up    29   01:32:04 Yes None
PE1            Gi0/1/1/1        *PtoP*         Up    26   01:31:59 Yes None
P3             PO0/0/0/0        *PtoP*         Up    29   01:32:00 Yes None

router isis NP
 set-overload-bit on-startup 300
 is-type level-2-only
 net 49.0001.1921.1813.6001.00
 log adjacency changes
 address-family ipv4 unicast
  metric-style wide
 !
 interface Loopback0
  passive
  address-family ipv4 unicast
  !
 !
 interface GigabitEthernet0/1/1/0
  point-to-point
  hello-password keychain NP-ISIS
  address-family ipv4 unicast
   metric 10
  !
 !
 interface GigabitEthernet0/1/1/1
  point-to-point
  hello-password keychain NP-ISIS
  address-family ipv4 unicast
   metric 10
  !
 !
 interface GigabitEthernet0/1/1/8
  point-to-point
  hello-password keychain NP-ISIS
  address-family ipv4 unicast
   metric 10
   mpls ldp sync
  !
 !
 interface POS0/0/0/0
  hello-password keychain NP-ISIS
  address-family ipv4 unicast
   metric 100
  !
 !
!