Re: How to Force router INT to be UP

Careful with Dynamips! it's different behaviour in dynamips!
nothing is connected to fas0/0 and it still shows UP / UP

Router(config-if)#
Router(config-if)#do show int fas0/0
FastEthernet0/0 is administratively down, line protocol is down
  Hardware is Gt96k FE, address is c400.02b4.0000 (bia c400.02b4.0000)
  MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Half-duplex, 10Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:09, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     13 packets output, 1920 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
Router(config-if)#
Router(config-if)#
Router(config-if)#
Router(config-if)#no shut
Router(config-if)#
Router(config-if)#
Router(config-if)#
Router(config-if)#
*Mar 1 00:02:10.259: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed
state to up
*Mar 1 00:02:11.259: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/0, changed state to up
Router(config-if)#
Router(config-if)#
Router(config-if)#
Router(config-if)#do show int fas0/0
FastEthernet0/0 is up, line protocol is up
  Hardware is Gt96k FE, address is c400.02b4.0000 (bia c400.02b4.0000)
  MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Half-duplex, 10Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:04, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 1000 bits/sec, 0 packets/sec
     0 packets input, 0 bytes
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     17 packets output, 3015 bytes, 0 underruns
     0 output errors, 0 collisions, 2 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
Router(config-if)#
Router(config-if)#
Router(config-if)#

On Tue, Oct 5, 2010 at 11:13 PM, <kebramccie_at_gmail.com> wrote:

> No keepalive under the interface will srely do the trick.. Atleast it works
> on my 2500 series routers. :)
>
> HTH
>
> Kabir
>
> Sent from my BlackBerry wireless device from MTN
>
> -----Original Message-----
> From: Mahmoud Eldeeb <eng.futurama_at_gmail.com>
> Sender: nobody_at_groupstudy.com
> Date: Tue, 5 Oct 2010 11:27:52
> To: Cisco certification<ccielab_at_groupstudy.com>; Cisco certification<
> comserv_at_groupstudy.com>; Cisco certification<cisco_at_groupstudy.com>
> Reply-To: Mahmoud Eldeeb <eng.futurama_at_gmail.com>
> Subject: How to Force router INT to be UP
>
> Dear All,
>
> How to Force cisco router fastethernet interface to be UP without external
> connection. I give this command (Keepalive). but still protocol down (cisco
> router 2811)
>
> --
> Best Regards,
>
> Eng. Mahmoud E. Eldeeb
> Senior Network & Security Engineer
> CCIE R&S/WR , CCNP
> JNCIS-FWV,JNCIS-ER,JNCIA-ER, JNCIA-EX
> Tel: +966547019850
>
>
> Blogs and organic groups at http://www.ccie.net
>
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Received on Tue Oct 05 2010 - 23:56:22 ART