I have connected two 2600 routers back to back using DTE/DCE cable. I have set the clock rate 56000 at DCE end. I have also assinged IP addresses to the Serial interfaces. But when I connect them I get this message
'serial is down line protocol is down'
Can someone please guide me
What is the clock source on both interfaces? If your trying to simulate a serial link they have to sync up to talk to each other. Set one side to internal clocking and the other to line clocking. Once you do that shut down one of the interfaces, then unshut it.
I have set the clock rate on one of the serial interfaces i.e Serial0/0 by using command
clock rate 56000 . Is that enough or do I need to do somthing else. Is this what you meant internal clocking.
How I set the other side to line clocking.
Could you please check you set the clock on the DCE side. Do a show controllers for the interfaces on each side of the link. One of them should recognise a DTE cable, and the other a DCE cable. The clock needs to be set on the DCE side.
If not, please post the results of the show controllers. This is what you should see:
R2#show controllers Serial1/0
CD2430 Slot 1, Port 0, Controller 0, Channel 0, Revision 19
Channel mode is synchronous serial
idb 0x852CC47C, buffer size 1524, V.35 DTE cable
R5#show controllers Serial 2
CD2430 unit 0, Channel 0, Chip Revision 0C, Microcode 18
Channel mode is synchronous serial
idb 0x2AAC08, buffer size 1524, V.35 DCE cable, clockrate 115200
After checking the clock by using show contollers command I get this on the dce side
Hardware is PowerQUICC MPC86042:25.538: %LINEPROTO-5-UPDOW
DCE V.35, clock rate 56000ce FastEthern
idb at 0x8199BE8C, driver data structure at 0x819A3C28
et0/0, changed st rmd(68012700): st
SCC Registers:h 60C address
General [GSMR]=0x2:0x00000000, Protocol-specific [PSMR]=0x8
rmd(68012708): status 9000
Events [SCCE]=0x0000, Mask [SCCM]=0x0000, Status [SCC
and the output of show interfaces is
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is 0014.6a5b.07c0 (bia 0014.6a5b.07c0)No serial cable attached
idb at 0x819921B8,
Internet address is 192.168.0.1/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,eneral [GSMR]=0x2:0x00000030, P output rate 0 bits/sec, 0 packets/secADIR]=0x1100, [PAPAR]=0xFFFF
0 packets input, 0 bytes, 0 no bufferADAT]=0x
Serial0/1 is administratively down, line protocol is down 7C66984
Hardware is PowerQUICC Serial2610#
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0, CXDA =0x00000000
Queueing strategy: weighted fair000000 (half-duplex)
Serial0/1 is administratively down, line protocol is down
Are you sure that you really issued the "no shutdown" command in the serial0/1 config sub-mode ?
administratively down normally appears after you issue the "shutdown" command.
Sorry if this is too trivial, but it's the first thing that comes to mind :)
This message indicates clearly problem at physical layer. Pls check if the cables are properly connected, & that the ports are not shutdown.
What is the hardware config for both the routers?
Are you sure you are connecting s0/1 of one router to s0/1 of other?
B'coz in show statement, one s0/1 is administratively down......
Can you pls provide "show ver" and "sh run"?
They are just HTML tags. The forum accepts a limited range of them. For bold, start with this without the spaces: < b >, and to end it < / b >.
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The one I wish they would implement is "