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"clock rate" command

hanwucisco
Level 1
Level 1

‎08-02-2005 11:29 PM - edited ‎03-02-2019 11:35 PM

whenever I type "clock rate 64000" in the router 2500,

it shows "ambiguous command: clock rate 64000".

It seems quite right, isnt it?

what is the problem?

thanks!

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0 Helpful
10 Replies 10

handsomeamit1
Level 1
Level 1

‎08-02-2005 11:38 PM

hi han,

pls tell that in which mode ur device it should be dce mode, pls check and revert.

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hanwucisco
Level 1
Level 1
In response to handsomeamit1

‎08-03-2005 12:19 AM

hi, handsome,

This interface is used to link to another router, both in s0, both 2500 series, is it enough info?

i think it is DCE, i honestly dont know, how can i tell?

thanks!

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hanwucisco
Level 1
Level 1
In response to handsomeamit1

‎08-03-2005 11:08 PM

Hi, Handsoe,

thanks, this is running config for router1, another one is basically the same,

Can you find what is wrong?

==================================================

router1#show running-config

Building configuration...

!

Version 12.1

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname router1

enable secret xxx

enable password xxx

!

!

!

ip subnet-zero

!

!

!

!

!

!

!

!

!

!

interface Serial0

ip address 175.x.x.x.255.255.0

no ip directed-broadcast

!

interface Serial1

no ip address

no ip directed-broadcast

!

interface Ethernet0

ip address 160.x.x.x.255.255.0

no ip directed-broadcast

!

interface Bri0

no ip address

no ip directed-broadcast

!

!

ip classless

no ip http server

!

!

!

line con 0

transport input none

line aux 0

line vty 0 4

!

no scheduler allocate

end

router1#

=======================================================

0 Helpful

handsomeamit1
Level 1
Level 1
In response to hanwucisco

‎08-04-2005 12:46 AM

hi han,

see when u are connecting two devices via serial ports, then one device has to be in DCE mode and the other has to be in DTE mode, you can find out that which device is DTE or DCE by:

#sh controller serial 0 command.

Basically,we have two types of devices that can communicate over a serial interface. DCE and DTE. A DCE provides a physical connection to a network then forwards traffic. A DTE connects to a network through a DCE device.

And if you want to change a DTE device to a DCE or vise versa you can use a device called a null modem adapter.Null modem adapter will change the wiring so that a DCE device will look like a DTE device or make a DTE device look like a DCE device.

hanwucisco
Level 1
Level 1
In response to handsomeamit1

‎08-04-2005 01:14 AM

thanks, handsome,

i applied show controller s 0 command, and it gave me the following info:

q1.i see there is "HD unit 0,V.35 DCE cable", does it mean this router is in DCE mode?

q2. I am using netsim now, a virtue lab, I think it can simulate what you said, and change the mode, but how? do you know this?

thanks agian.

===========================================================

router1#sh controller s 0

HD unit 0, idb = 0x1AE828, driver structure at 0x1B4BA0

buffer size 1524 HD unit 0,V.35 DCE cable

cpb = 0x7, eda = 0x58DC, cda = 0x58F0

RX ring with 16 entries at 0x4075800

00 bd_ptr=0x5800 pak=0x1B5E24 ds=0x4079108 status=80 pak_size=13

01 bd_ptr=0x5814 pak=0x1B85B8 ds=0x4080384 status=80 pak_size=13

02 bd_ptr=0x5828 pak=0x1B880C ds=0x4080A40 status=80 pak_size=69

03 bd_ptr=0x583C pak=0x1B8110 ds=0x407F60C status=80 pak_size=13

04 bd_ptr=0x5850 pak=0x1B7EBC ds=0x407EF50 status=80 pak_size=13

05 bd_ptr=0x5864 pak=0x1B7C68 ds=0x407E894 status=80 pak_size=13

06 bd_ptr=0x5878 pak=0x1B7A14 ds=0x407E1D8 status=80 pak_size=13

07 bd_ptr=0x588C pak=0x1B77C0 ds=0x407DB1C status=80 pak_size=13

08 bd_ptr=0x58A0 pak=0x1B756C ds=0x407D460 status=80 pak_size=69

09 bd_ptr=0x58B4 pak=0x1B7318 ds=0x407CDA4 status=80 pak_size=13

10 bd_ptr=0x58C8 pak=0x1B70C4 ds=0x407C6E8 status=80 pak_size=13

11 bd_ptr=0x58DC pak=0x1B6E70 ds=0x407C02C status=80 pak_size=13

12 bd_ptr=0x58F0 pak=0x1B69C8 ds=0x407B2B4 status=80 pak_size=13

13 bd_ptr=0x5904 pak=0x1B6774 ds=0x407ABF8 status=80 pak_size=69

14 bd_ptr=0x5918 pak=0x1B6520 ds=0x407A53C status=80 pak_size=13

15 bd_ptr=0x592C pak=0x1B62CC ds=0x4079E80 status=80 pak_size=13

16 bd_ptr=0x5940 pak=0x1B6078 ds=0x40797C4 status=80 pak_size=13

cpb = 0x7, eda = 0x6014, cda = 0x6014

TX ring with 1 entries at 0x4076000

Press Enter to Start

%LINK-3-UPDOWN: Interface Ethernet0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed state to up

%LINK-3-UPDOWN: Interface Bri0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Bri0, changed state to up

router1(config-line)#^Z

%SYS-5-CONFIG_I: Configured from console by console

router1#sh controller s 0

HD unit 0, idb = 0x1AE828, driver structure at 0x1B4BA0

buffer size 1524 HD unit 0,V.35 DCE cable

cpb = 0x7, eda = 0x58DC, cda = 0x58F0

RX ring with 16 entries at 0x4075800

00 bd_ptr=0x5800 pak=0x1B5E24 ds=0x4079108 status=80 pak_size=13

01 bd_ptr=0x5814 pak=0x1B85B8 ds=0x4080384 status=80 pak_size=13

02 bd_ptr=0x5828 pak=0x1B880C ds=0x4080A40 status=80 pak_size=69

03 bd_ptr=0x583C pak=0x1B8110 ds=0x407F60C status=80 pak_size=13

04 bd_ptr=0x5850 pak=0x1B7EBC ds=0x407EF50 status=80 pak_size=13

05 bd_ptr=0x5864 pak=0x1B7C68 ds=0x407E894 status=80 pak_size=13

06 bd_ptr=0x5878 pak=0x1B7A14 ds=0x407E1D8 status=80 pak_size=13

07 bd_ptr=0x588C pak=0x1B77C0 ds=0x407DB1C status=80 pak_size=13

08 bd_ptr=0x58A0 pak=0x1B756C ds=0x407D460 status=80 pak_size=69

09 bd_ptr=0x58B4 pak=0x1B7318 ds=0x407CDA4 status=80 pak_size=13

10 bd_ptr=0x58C8 pak=0x1B70C4 ds=0x407C6E8 status=80 pak_size=13

11 bd_ptr=0x58DC pak=0x1B6E70 ds=0x407C02C status=80 pak_size=13

12 bd_ptr=0x58F0 pak=0x1B69C8 ds=0x407B2B4 status=80 pak_size=13

13 bd_ptr=0x5904 pak=0x1B6774 ds=0x407ABF8 status=80 pak_size=69

14 bd_ptr=0x5918 pak=0x1B6520 ds=0x407A53C status=80 pak_size=13

15 bd_ptr=0x592C pak=0x1B62CC ds=0x4079E80 status=80 pak_size=13

16 bd_ptr=0x5940 pak=0x1B6078 ds=0x40797C4 status=80 pak_size=13

cpb = 0x7, eda = 0x6014, cda = 0x6014

TX ring with 1 entries at 0x4076000

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handsomeamit1
Level 1
Level 1
In response to hanwucisco

‎08-04-2005 02:46 AM

a 1) yes it means it is in dce mode and u should be able to set the clock rate for that.

a 2) is the above config which has been mentioned twice of one router only or both the routers? If it is of only one router (which it appears to be as it is router1 only) then check the controller of the other router or simulator you have.

0 Helpful

hanwucisco
Level 1
Level 1
In response to handsomeamit1

‎08-04-2005 07:59 PM

Hi, thanks,

Please look at the following info I've got. any advice would be appreciated.

1. My job is simple connect Router1 and Router3 with serial 0 ports on both routers. Under the command "show controller s 0", one Router1 showed as DCE, Router3 DTE.I assigned two Ip for both end. 175.10.1.1/24 and 175.10.1.2/24;

2. after assigning IP, I typed "clock rate 64000", then it said "Ambiguous Command: clock rate 64000",

3. after fail this command, I tried "no shut" anyway. the router said:

(config-if)#no shut

%LINK-3-UPDOWN: Interface Serial0, changed state to up

%LINK-3-UPDOWN: Interface Serial0, changed state to down

"

0 Helpful

hjmacholl
Level 1
Level 1
In response to hanwucisco

‎08-05-2005 12:48 AM

Hi,

"ambiguous" means, that there is a choice of possible commands of (in a certain way) similar spelling.-

Enter in interface config mode "clock ?", "clock rate ?" and "clock rate 64000 ?". The response will be interisting. Is there no further command to choose - and I know no possible command on a 2500 router in this mode - there is a software bug.

I have tested your config and your inputs, as well as other possibilities with no unusual results. Your "ambigous command" message is a very unusual result.

0 Helpful

hjmacholl
Level 1
Level 1

‎08-05-2005 01:52 AM

Hi,

to solve the problem I would suggest the following procedure:

1. Exchange the roles of the routers by exchanging the cable ends.

2. Use the "no clock rate 64000" command on the existing (up to now) DCE router and the "clock rate 64000" on the new DCE router (the old DTE router) in each case in the interface config mode.

If there are no issues (and this should be in case the new DCE has another system image file in its flash memory) the problem is fixed for the moment.

First you know now the problem cause definitely, and second you could fix the problem for ever.

3. Do this if you want by copying the image file from the flash memory of the new DCE to a TFTP server (e.g. a Windows workstation/notebook) with the "copy flash tftp" command and copy then this system image file with the "copy tftp flash" to the old DCE router flash memory. (Check the space of the flash memory of the old DCE before with the "show flash" or "dir" command in global config mode. Note: If not enough space available, you cannot simple clear the current image file! You need instead a bigger flash memory.)

Regards,

hjmacholl

0 Helpful

hanwucisco
Level 1
Level 1
In response to hjmacholl

‎08-08-2005 09:03 AM

Thanks, Guys,

I've solve that question by bypassing it.

cheers!

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