port mismatching

[selbay061]

Hi,

I connected Cisco 2960 and HP 1910 Switches together with default configs but ports didnt became UP.Then I assinged VLAN 200 on Cisco sites and ports was UP for a while and then a few hours later ports became DOWN again.whenever I do "shutdown and no shutdown" on cisco site,ports becomes UP firstly  and port return DOWN again for a few hours later.Cisco Site are FastEthernet port,HP are Gigabit Ethernet port.Although I tried to change ports setting manually(100Mb/Full) on HP site.if I dont do port as  access on cisco site,port never is UP

Problem still continues.is there any somebody who has this experience int the past?it seems a pyhsical mismatching.Configurations are as below.

Cisco config;

port fast 0/1

switch mode access

switch acces vlan 200

spanning-tree portfast

end

..........................................................................

HP config is default(Gigabit ethernet)(Access,speed auto

BR

[devils_advocate]

When you say the port goes DOWN, does the whole port go down, as below:

GigabitEthernet1/0/13 is down, line protocol is down (notconnect)

A speed or duplex mismatch tends to manifest itself straight away, it would be unusual for it to be online for an hour then to go down.

Potentially it could be STP putting the port into a blocking state but again, I would expect this to happen as soon as the port first comes online.

Assuming the configuration is as you suggested, then it seems like unusual behavior.

Can you post the full config from both switches?

Have you tried changing the cables?

[selbay061]

Hi,

Thanks for your responses firstly,

I have already tried to change cables and nothing changed.Some outputs are as below.Now port has been UP for 2 days but it is stable...

SW#sh logging | include Fa0/1
1d00h: %PM-4-ERR_DISABLE: loopback error detected on Fa0/1, putting Fa0/1 in err-disable state
1d00h: %PM-4-ERR_DISABLE: loopback error detected on Fa0/1, putting Fa0/1 in err-disable state
1d00h: %PM-4-ERR_DISABLE: loopback error detected on Fa0/1, putting Fa0/1 in err-disable state
1d00h: %PM-4-ERR_DISABLE: loopback error detected on Fa0/1, putting Fa0/1 in err-disable state
1d02h: %PM-4-ERR_DISABLE: loopback error detected on Fa0/1, putting Fa0/1 in err-disable state

-----------------------------------------------------------------------------------------------

SW#sh int fastEthernet 0/1
FastEthernet0/1 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0019.e8aa.3801 (bia 0019.e8aa.3801)
Description:ABC
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, media type is 10/100BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output 00:00:00, output hang never
Last clearing of "show interface" counters never
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 2000 bits/sec, 3 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1154575809 packets input, 91497506997 bytes, 0 no buffer
Received 2160675 broadcasts (0 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 544670 multicast, 0 pause input
0 input packets with dribble condition detected
203852 packets output, 28530589 bytes, 0 underruns
0 output errors, 0 collisions, 33 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
SW#

BR

[selbay061]

sorry I wanted to tell "it is not stable" not "it is stable"...

may it be a solution to remove keepalives?may it be accur any problems to remove keepalives?

BR

[Tagir Temirgaliyev]

I think you need syslog server and try to find what is the reson port down

or try

sh logg | i f0/1