We are commisining new link on our router. SFP is connected but not coming up. Here is the interface ststus. Is this physical connectivity problem ot configuration negotion issue?
Thsi is a ASR 1K. I guess if its a physical coneectivty issue does it show notconnecte on the line in bracket? Or on router it doesent please help.
ITV-GRW-INET-RTR1B#show int gigabitEthernet 0/1/2 GigabitEthernet0/1/2 is down, line protocol is down Hardware is SPA-5X1GE-V2, address is f866.f2aa.e941 (bia f866.f2aa.e892) Description: ** Part of ether-channel to 6DG internet ** MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive not supported Full Duplex, 1000Mbps, link type is auto, media type is SX output flow-control is on, input flow-control is on ARP type: ARPA, ARP Timeout 04:00:00 Last input never, output never, output hang never Last clearing of "show interface" counters never Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 no buffer Received 0 broadcasts (0 IP multicasts) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 0 multicast, 0 pause input 0 packets output, 0 bytes, 0 underruns
If your SFP has DOM support, you can verify the optical receive-signal from the other side. This is independant of establishing a link:
xxx#sh hw-module subslot 0/0 transceiver 0 status
The Transceiver in slot 0 subslot 0 port 0 is enabled.
Module temperature = +39.164 C
Transceiver Tx supply voltage = 3298.5 mVolts
Transceiver Tx bias current = 19904 uAmps
Transceiver Tx power = -5.5 dBm
Transceiver Rx optical power = -12.4 dBm
For 1000Base-SX you should have a signal above -17 dBm. Levels below -30 dBm are typically interchanged (or broken) fibers.
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