06-05-2003 06:55 AM - edited 03-02-2019 07:54 AM
I have a Catalyst 2950 - 24 port switch and it is connected to a Cisco 2620 router. When I am on the 2620 and type show CDP neighbour I can see the 2950 switch, then I console onto the switch and type show CDP neighbour I am unable to see the router.
Can anyone please assist in this matter because I am at lost to resolve this problem.
Thanks
06-05-2003 07:05 AM
It seems you have a one way circuit. The Tx from the router to the Rx on the switch is broken . Are you hard coded on your speeds and duplex settings ? If so try swapping the cable .
06-05-2003 07:31 AM
Thanks for replying. The switch port where the router is located the speed and duplex settings are not hard coded. Also I ran debug CDP packet and CDP packets are sent out of the port
06-05-2003 07:33 AM
I would hard code , reset the port . If you still do not get CDP swap the cablel
06-05-2003 07:51 AM
I have hard code, reset port, changed cable and restart switch and still do not get any CDP
06-05-2003 07:53 AM
I would
1. move to a different sw port
2. move to a differnet port on router
06-05-2003 08:02 AM
Move to a different switch port same result. Unable to move to different router only one available. I have just tried attaching a 1750 router to the switch and it works ok, could it be an IOS problem with the 2620 router? Current IOS on 2620 flash:c2600-i-mz.121-9.bin
06-05-2003 08:17 AM
On your router clear counters do a sh int ethernet x
Do you see the output packets incrementing ?
Can you paste in an out put form the sh int Ehternet xx
06-05-2003 08:33 AM
h int f0/0
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is 00d0.bbd3.26c0 (bia 00d0.bbd3.26c0)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:06, output 00:00:03, output hang never
Last clearing of "show interface" counters 00:01:18
Input queue: 0/75/0/0 (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
8 packets input, 785 bytes
Received 8 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
10 packets output, 1108 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
06-05-2003 08:42 AM
Can you post the sh int from the switch
06-05-2003 08:46 AM
I did find a bug you may be hitting CSCdk47710
06-05-2003 08:49 AM
Hi can you you explain please
06-05-2003 08:54 AM
Cisco has a known bug listed before that affected the ethernet port of the 2620 router. If you do a show diag, and under the parts number, if you see 73-2843-03, you have the bug.
ROUTER#sh diag
Slot 0:
C2620 1FE Mainboard Port adapter, 2 ports
Port adapter is analyzed
Port adapter insertion time unknown
EEPROM contents at hardware discovery:
Hardware revision 1.0 Board revision A0
Serial number 3364712934 Part number 73-2843-03
Test history 0x0 RMA number 00-00-00
EEPROM format version 1
EEPROM contents (hex):
0x20: 01 94 01 00 C8 8D 71 E6 49 0B 1B 03 00 00 00 00
0x30: 50 17 6C 06 00 00 00 00 00 00 00 00 00 00 00 00
WIC Slot 0:
FT1 WAN daughter card
Hardware revision 1.3 Board revision B0
Serial number 13879670 Part number 800-03279-03
Test history 0x0 RMA number 00-00-00
Connector type Wan Module
EEPROM format version 2
EEPROM contents (hex):
0x20: 02 11 01 03 00 D3 C9 76 50 0C CF 03 00 00 00 00
0x30: 58 00 00 00 99 04 15 01 FF FF FF FF FF FF FF FF
The only fix is to replace the router.
06-05-2003 08:50 AM
sh int f0/1
FastEthernet0/1 is up, line protocol is up
Hardware is Fast Ethernet, address is 000c.ce2d.6d01 (bia 000c.ce2d.6d01)
MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:01, output hang never
Last clearing of "show interface" counters 00:04:19
Input queue: 0/75/0/0 (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
26 packets input, 2936 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
4 input errors, 4 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
193 packets output, 14297 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
06-05-2003 09:04 AM
Thanks you for your assistance
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