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STM ports , protocol down

Hi all, thanks in advance

please suggest me what is the reason for interface pos1/2/0 to be up,protocol down

sh ip int pos1/2/0

POS1/2/0 is up, line protocol is down

Internet address is 10.197.208.1/30

Broadcast address is 255.255.255.255

Address determined by setup command

sh ip int pos1/2/1

POS1/2/1 is up, line protocol is up

Internet address is 10.197.208.9/30

Broadcast address is 255.255.255.255

Address determined by non-volatile memory

Peer address is 10.197.208.10

sh int pos1/2/0

POS1/2/0 is up, line protocol is down

Hardware is Packet over Sonet

Description: "STM1 Link to Hyderabad (TeleBhavan) NIB2 Router"

Internet address is 10.197.208.1/30

MTU 4470 bytes, BW 155000 Kbit, DLY 100 usec,

reliability 223/255, txload 1/255, rxload 1/255

Encapsulation PPP, crc 32, loopback not set

Keepalive set (10 sec)

Scramble disabled

LCP REQsent

Closed: CDPCP, IPCP

sh int pos1/2/1

POS1/2/1 is up, line protocol is up

Hardware is Packet over Sonet

Description: "STM1 Link to Secunderabad NIB2 Router"

Internet address is 10.197.208.9/30

MTU 4470 bytes, BW 155000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation PPP, crc 16, loopback not set

Keepalive set (10 sec)

Scramble disabled

LCP Open

Listen: CDPCP

Open: IPCP

1 REPLY
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Re: STM ports , protocol down

line protocol field status "indicates whether the software processes that handle the line protocol consider the line usable (that is, keepalives are successful) or whether it has been taken down by an administrator."

Troubleshooting "Line Protocol is Down" Problems on POS Interfaces

http://www.cisco.com/en/US/tech/tk482/tk607/technologies_white_paper09186a0080094699.shtml

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