Re: Backup interface

HI Khoa,

Shutting down an interface will not give you the result you are
expecting..Try shutting the PVC down by removing the encapsulation/DLCI or
try another means of making the line protocol down of the serial interface
rather than shutting it down..

Ravi

On Sat, Jul 18, 2009 at 10:14 AM, Anh Khoa Le Viet <lvakhoa_at_gmail.com>wrote:

> Dear Group,
>
> I'm doing a practice lab and really stuck with "backup interface"
> configuration. Would anyone please help to advise?
>
> Question: R5 -----------Ethernet --------- R4
> |-----------Frame Relay---------|
> Ethernet link between R4 and R5 has been installed as a backup of the
> Frame Relay circuit between them. backup interface should wait for 30s
> after
> the FR int come up before disabled.
>
> My configuration:
> r5: interface Serial0/0
> backup delay 0 30
> backup interface FastEthernet0/1
> ip address 129.1.54.5 255.255.255.0
> encapsulation frame-relay
> frame-relay map ip 129.1.54.4 504 broadcast
> no frame-relay inverse-arp
> frame-relay lmi-type cisco
> interface FastEthernet0/1
> ip address 129.1.45.5 255.255.255.0
> duplex auto
> speed auto
> R4: interface Serial0/0.54 point-to-point
> ip address 129.1.54.4 255.255.255.0
> frame-relay interface-dlci 405
> !
> interface FastEthernet0/0
> ip address 129.1.45.4 255.255.255.0
> duplex auto
> speed auto
> Rack1R5(config-if)#do show ip int br
> Interface IP-Address OK? Method
> Status Protocol
> FastEthernet0/0 129.1.58.5 YES manual up
> up
> Serial0/0 129.1.54.5 YES manual
> up up
> FastEthernet0/1 129.1.45.5 YES manual *standby mode
> down *
> As in Cisco Configuration Guide (Dial), for the "backup interface"
> configuration, it just need "backup int fa0/1" and "delay 0 30" are enough
> but when I do a shut in S0/0, the Fa0/0 turned *disabled*:
> Rack1R5#show ip int br
> Interface IP-Address OK? Method Status
> Protocol
> FastEthernet0/0 129.1.58.5 YES manual up
> up
> Serial0/0 129.1.54.5 YES manual administratively down
> down
> FastEthernet0/1 129.1.45.5 YES *manual standby
> mode/disabled
> down *
>
> And output of debug backup:
> Rack1R5(config-if)#
> Jul 17 16:13:50.534: BACKUP(Serial0/0): event = primary interface shutdown
> Jul 17 16:13:50.534: BACKUP(Serial0/0): secondary interface
> (FastEthernet0/1) moved to standby
> Jul 17 16:13:50.534: BACKUP(Serial0/0): changed state to "disabled"
> Rack1R5(config-if)#
> Jul 17 16:13:52.541: %LINK-5-CHANGED: Interface Serial0/0, changed state to
> administratively down
> Jul 17 16:13:53.543: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Serial0/0, changed state to down
> Jul 17 16:13:53.543: BACKUP(Serial0/0): event = primary interface went down
> Jul 17 16:13:53.543: *BACKUP(Serial0/0): backup is currently disabled on
> this interface*
> Rack1R5(config-if)#
>
> Am I missing something here? Why Fa0/0 do not come up as expected? :(.
>
> Thanks and best Regards,
> Khoa
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Sat Jul 18 2009 - 10:20:19 ART