Re: Serial0/0 is up, line protocol is down

From: Xiaobo Zhu (xiaobo@zhu.net)
Date: Sat Mar 07 2009 - 09:10:40 ARST

Sorry for the wrong subnet mask, but it still can't work proper after I
configured it correctly.

On Sat, Mar 7, 2009 at 6:27 PM, Xiaobo Zhu <xiaobo@zhu.net> wrote:

> R1's s0/0 is connected to R2's s0/0 directly, and configured as follows,
> will any one please figure out why the interface status is up but protocol
> status is down?
>
> R1(config-if)#do sh contr s0/0
> Interface Serial0/0
> Hardware is PowerQUICC MPC860
> DTE V.35 RX clock detected.
>
> R1(config-if)#do sh run int s0/0
> Building configuration...
> Current configuration : 73 bytes
> !
> interface Serial0/0
> ip address 12.0.0.1 255.0.0.0
> no fair-queue
> end
>
> R2(config-if)#do sh contr s0/0
> Interface Serial0/0
> Hardware is PowerQUICC MPC860
> DCE V.35, clock rate 64000
> idb at 0x82C0C31C, driver data structure at 0x82C140F0
> SCC Registers:
>
> R2(config-if)#do sh run int s0/0
> Building configuration...
> Current configuration : 95 bytes
> !
> interface Serial0/0
> ip address 12.0.0.2 255.255.255.0
> clock rate 64000
> no fair-queue
> end
> R1#sh ip int b
> Interface IP-Address OK? Method Status
> Protocol
> Ethernet0/0 unassigned YES NVRAM administratively down
> down
> Serial0/0 12.0.0.1 YES manual up
> up
> Ethernet0/1 unassigned YES NVRAM administratively down
> down
>
> R2(config-if)#do sh ip int b
> Interface IP-Address OK? Method Status
> Protocol
> Ethernet0/0 unassigned YES NVRAM administratively down
> down
> Serial0/0 12.0.0.2 YES manual up
> down
> Serial0/1 unassigned YES NVRAM administratively down
> down
>
> --
> Xiaobo Zhu
> 

-- 
Xiaobo Zhu

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