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1683 Views 8 Replies Latest reply: Jul 26, 2011 10:41 PM by Martin RSS

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Help with a lab setup

Jul 23, 2011 8:01 PM

Wayne 6 posts since
Jun 28, 2008

First my apologies for the huge post, I've just started to setup a home lab I have available two each 2610 and 2620 routers and one 2521. The issue I'm experencing is what I go to set the clock rate  on the 2610 and do a "show run" with the cable (DCE End) disconnected  from the  2620 the Clock Rate is present. I connect the DCE cable and perform another "Show Run" and no clcck rate is present in the output. On serial interface Line Up Protocal Down.

 

Lab 1: Basic IP lab—IP addressing  

     IP addressing
This is the output with the DCE end of  cable discconected from the 2610. The DTE end is connected to the 2521

 

RouterA#sh run
Building configuration...

Current configuration : 894 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname RouterA
!
logging rate-limit console 10 except errors
enable secret 5 $1$jGOY$Nagu9h1qL7bpttb6opVRS0
!
username banbury password 0 ccna
ip subnet-zero
!
!
no ip finger
!
ip audit notify log
ip audit po max-events 100
!
!        
call rsvp-sync
!
!
!
!
!
!
!
!
interface Loopback0
ip address 172.16.1.10 255.255.0.0
!
interface Loopback1
ip address 172.20.1.1 255.255.0.0
!
interface Ethernet0/0
no ip address
shutdown
half-duplex
!
interface Serial0/0
ip address 192.168.1.1 255.255.255.252
clockrate 64000
!
interface Serial0/1
no ip address
shutdown
!
ip classless
no ip http server
!
!
dial-peer cor custom
!
!
!
!
!
line con 0
password letmein
transport input none
line aux 0
line vty 0 4
login local
!
no scheduler allocate
end

 

 

This is the output with the DCE end of cable connected to the 2610  The DTE still connected to the 2521

 

RouterA#
09:01:45: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
09:01:46: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
RouterA#sh run
Building configuration...

Current configuration : 877 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname RouterA
!
logging rate-limit console 10 except errors
enable secret 5 $1$jGOY$Nagu9h1qL7bpttb6opVRS0
!
username banbury password 0 ccna
ip subnet-zero
!
!
no ip finger
!
ip audit notify log
ip audit po max-events 100
!
!        
call rsvp-sync
!
!
!
!
!
!
!
!
interface Loopback0
ip address 172.16.1.10 255.255.0.0
!
interface Loopback1
ip address 172.20.1.1 255.255.0.0
!
interface Ethernet0/0
no ip address
shutdown
half-duplex
!
interface Serial0/0
ip address 192.168.1.1 255.255.255.252
!        
interface Serial0/1
no ip address
shutdown
!
ip classless
no ip http server
!
!
dial-peer cor custom
!
!
!
!
!
line con 0
password letmein
transport input none
line aux 0
line vty 0 4
login local
!
no scheduler allocate
end      

RouterA#
09:02:13: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down

  • Keneil Facey 200 posts since
    Oct 1, 2010
    Currently Being Moderated
    1. Jul 23, 2011 8:27 PM (in response to Wayne)
    Re: Help with a lab setup

    Could you post a show run of the DTE router for further analysis.

     

    Thanks

  • Martin 13,076 posts since
    Jan 16, 2009
    Currently Being Moderated
    2. Jul 23, 2011 10:03 PM (in response to Wayne)
    Re: Help with a lab setup

    not sure if I understand ?

    But

    show run does not tell if interface is up or down;

    show ip int brief or show intreface  will show you status;

    and show controllers  will tell you weather serial is with DCE or DTE cable;

  • Keneil Facey 200 posts since
    Oct 1, 2010
    Currently Being Moderated
    5. Jul 24, 2011 9:21 AM (in response to Wayne)
    Re: Help with a lab setup

    I know show run doesnt really help in telling if an interface is up or down, I just needed to see what he had configured if there were any conflicting commands.

     

    Ok, seems normal so far, now could you post the output of show interface ser 0/0 and ser 0 on both routers, followed by a show controllers ser 0/0 and ser 0 as what Martin noted earlier.

     

    ***UPDATE***

    I may have overlooked something, since the link is in the down state, it may be a physical problem, check if the cables are properly seated, in the correct interfaces, and in good condition, also try to configure other interfaces on the routers and try the cables in those.

     

    Thanks

  • Keneil Facey 200 posts since
    Oct 1, 2010
    Currently Being Moderated
    7. Jul 24, 2011 3:06 PM (in response to Wayne)
    Re: Help with a lab setup

    No problem, glad it all worked out.

  • Martin 13,076 posts since
    Jan 16, 2009
    Currently Being Moderated
    8. Jul 26, 2011 10:41 PM (in response to Wayne)
    Re: Help with a lab setup

    I can Tell you BIG secret; you do not have to check cables in back of a router; sometimes you do not have access to router;

    But, to see whether your router interface is DTE or DCE , you can do show controllers

     

    Edge2#sh controllers serial 0/1/0

    Interface Serial0/1/0

    Hardware is PowerQUICC MPC860

    DTE V.35 TX and RX clocks detected

    idb at 0x81081AC4, driver data structure at 0x81084AC0

     

    Edge2#sh controllers serial 0/1/1

    Interface Serial0/1/1

    Hardware is PowerQUICC MPC860

    DCE V.35, clock rate 64000

    and

    if you not sure, just set up clocking any way;
    DCE will take it and DTE will not;

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