From: Scott Morris (swm@emanon.com)
Date: Tue Jun 06 2006 - 15:09:04 ART
No. If you use the backup interface command set, and then use the 'shut'
command on the primary interface, the backup will never kick off. The
router knows you were trying to be sneaky, so it ignores you. :)
Try changing your LMI type or unplugging the cable if you're by your router.
That will cause the L2 portion to go down and kick off the backup.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Leigh Harrison
Sent: Tuesday, June 06, 2006 1:19 PM
To: Sami
Cc: ccielab@groupstudy.com
Subject: Re: FR backup interface
Hi there,
I'm pretty sure there has to be a layer 1 error
LH
Sami wrote:
> Hi,
>
> Could someone confirm backup interface doesn't become operational when
> active inteerface is adminstrativly down. I tried on FR subinterface
> with shutdown command but ppp interface doesn't come up after 60
> seconds.. I am waiting and waiting but it seems PPP doesn't come up....
>
> my config..
>
>
> R5(config-subif)#backup delay 60 300
>
> R5(config-subif)#backup interface s0/1/0 R5(config-subif)#
>
>
>
>
> *Jun 6 16:36:34.623: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
> 132.1.45.4(Serial0/1/0) is down: interface down
> R5(config-subif)#
> *Jun 6 16:36:36.619: %LINK-5-CHANGED: Interface Serial0/1/0, changed
state
> to standby mode
> *Jun 6 16:36:37.619: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Serial0/1/0, changed state to down
> R5(config-subif)#shut
> R5(config-subif)#shutdown
> R5(config-subif)#
> *Jun 6 16:37:58.315: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor
> 132.1.35.3(Serial0/0/0.1) is down: interface down
> R5(config-subif)#^Z
> R5#sho
> R5#show i
> *Jun 6 16:40:12.975: %SYS-5-CONFIG_I: Configured from console by console
> R5#show ip int
> R5#show ip interface bri
> R5#show ip interface brief
> Interface IP-Address OK? Method Status
> Protocol
> FastEthernet0/0 132.1.5.5 YES NVRAM up
> up
> FastEthernet0/1 192.10.1.5 YES NVRAM up
> up
> Serial0/0/0 unassigned YES NVRAM up
> up
> Serial0/0/0.1 132.1.35.5 YES NVRAM administratively
down
> down
> Serial0/1/0 132.1.45.5 YES NVRAM standby
mode/disabled
> down
> Loopback0 150.1.5.5 YES NVRAM up
> up
> R5#conf t
> Enter configuration commands, one per line. End with CNTL/Z.
> R5(config)#int s0/0/0
> R5(config-if)#shu
> R5(config-if)#shutdown
> R5(config-if)#
> R5#sho
> R5#show
> *Jun 6 16:41:39.971: %SYS-5-CONFIG_I: Configured from console by console
> R5#show int
> R5#show interfaces s0/1/0
> Serial0/1/0 is standby mode/disabled, line protocol is down
> Hardware is GT96K Serial
> Internet address is 132.1.45.5/24
> MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
> reliability 255/255, txload 1/255, rxload 1/255
> Encapsulation PPP, LCP Closed, loopback not set
> Keepalive set (10 sec)
> Last input 00:05:12, output 00:05:12, output hang never
> Last clearing of "show interface" counters 01:01:15
> Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
> Queueing strategy: weighted fair
> Output queue: 0/1000/64/0 (size/max total/threshold/drops)
> Conversations 0/1/256 (active/max active/max total)
> Reserved Conversations 0/0 (allocated/max allocated)
> Available Bandwidth 1158 kilobits/sec
> 5 minute input rate 0 bits/sec, 0 packets/sec
> 5 minute output rate 0 bits/sec, 0 packets/sec
> 1460 packets input, 75794 bytes, 0 no buffer
> Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
> 1454 packets output, 76042 bytes, 0 underruns
> 0 output errors, 0 collisions, 2 interface resets
> 0 output buffer failures, 0 output buffers swapped out
> 0 carrier transitions
> DCD=down DSR=down DTR=up RTS=down CTS=down
>
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