line protocol is down

mcaissie · ‎06-03-2002

Hi,

i am trying to connect a 3640 router in a 2948 switch. On the router i

always get

a line protocol is down on the FE interface. But on the switch i got the

line protocol

is up on the port where the 3640 is connected. I tried a different cable ,

different port

of the switch , even a different 3640 and i always get the same behavior.

Any hints ?

thanks

Michel Caissie

On the Router

FastEthernet0/1 is up, line protocol is down

Hardware is AmdFE, address is 0002.1630.70c2 (bia 0002.1630.70c2)

Internet address is a.b.c.d/24

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)

Auto-duplex, Auto Speed, 100BaseTX/FX

ARP type: ARPA, ARP Timeout 04:00:00

On the switch

FastEthernet9 is up, line protocol is up

Hardware is epif_port, address is 0001.43af.a00f (bia 0001.43af.a00f)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 1/255

Encapsulation ARPA, loopback not set, keepalive set (10 sec)

Auto-duplex, Auto Speed, 100BaseTX

ARP type: ARPA, ARP Timeout 04:00:00

marcelo_sucholicki · ‎06-03-2002

are you sure , these interfaces are duplex and speed negotiating?

mcaissie · ‎06-03-2002

i tried forcing the speed/duplex on both sides .

100 Full same result

10 Full same result

Each time i modify speed or duplex , the line protocol goes up for maybe 2 seconds and then goes down again.

Also keepalives is enabled on both sides

marcelo_sucholicki · ‎06-04-2002

port security orr any aditional characteristics are enabled??