[rancid] VLAN 1 port members change when port goes down

[Martin Barry]

Hi list

I'm trying to tune the signal to noise ratio from rancid and I have an issue
with VLAN 1 (Yes, yes, I know you shouldn't use it. Dealing with legacy
config here).

When a port in VLAN 1 goes down, the next time rancid runs I get diffs like:

  !
  !VLAN: VLAN Name                             Status    Ports
  !VLAN: ---- -------------------------------- --------- -------------------------------
- !VLAN: 1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/6
- !VLAN:                                                 Fa0/7, Fa0/9, Fa0/11, Fa0/13
- !VLAN:                                                 Fa0/15, Fa0/19, Fa0/20, Fa0/21
- !VLAN:                                                 Fa0/22, Fa0/23, Fa0/26, Fa0/28
- !VLAN:                                                 Fa0/30, Fa0/32, Fa0/34, Fa0/36
- !VLAN:                                                 Fa0/39, Gi0/2
+ !VLAN: 1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/5
+ !VLAN:                                                 Fa0/6, Fa0/7, Fa0/9, Fa0/11
+ !VLAN:                                                 Fa0/13, Fa0/15, Fa0/19, Fa0/20
+ !VLAN:                                                 Fa0/21, Fa0/22, Fa0/23, Fa0/26
+ !VLAN:                                                 Fa0/28, Fa0/30, Fa0/32, Fa0/34
+ !VLAN:                                                 Fa0/36, Fa0/39, Gi0/2
  !VLAN: 27   VLAN0027                         active    Fa0/45, Fa0/46, Fa0/47, Fa0/48
  !VLAN: 100  VLAN0100                         active    
  !VLAN: 110  VLAN0110                         active    


When the port comes back up, I get the reverse.

Anyone figured out a way to stop the port memberships flapping or exclude it
from the rancid diffs?

cheers
Marty