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

john heasley heas at shrubbery.net
Wed Jul 28 17:09:31 UTC 2010


Wed, Jul 28, 2010 at 09:32:56AM -0700, Chandler, Mel:
> I'm seeing this same thing in our diffs.  Any word on a work around or
> should I just ignore it?
> 
> Chandler Bing
> 
> -----Original Message-----
> From: rancid-discuss-bounces at shrubbery.net
> [mailto:rancid-discuss-bounces at shrubbery.net] On Behalf Of Martin Barry
> Sent: Tuesday, July 27, 2010 7:09 AM
> To: rancid-discuss at shrubbery.net
> Subject: [rancid] VLAN 1 port members change when port goes down
> 
> 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:

IIRC, this occurs when VTP is enabled.  it may occur in other instances
that i'm not aware of.  either disable vtp or comment-out 'show vlan'
in the rancid script.

>   !
>   !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
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