I have just started messing around with cisco routers and I have run into a few things I can not found answers for.
I can configure a router and save the config with 'copy running-config startup-config' but when I restart the router the config is blank.
sometimes I cant start a interface, in this case ethernet0. I issue the command and the interface just bounces.
wouter#show ip interface brief Interface IP-Address OK? Method Status Protocol FastEthernet1 unassigned YES unset administratively down down FastEthernet2 unassigned YES unset administratively down down FastEthernet3 unassigned YES unset administratively down down FastEthernet4 unassigned YES unset administratively down down Ethernet0 188.8.131.52 YES manual down down ATM0 unassigned YES manual administratively down down Ethernet2 unassigned YES manual administratively down down
wouter#config terminal Enter configuration commands, one per line. End with CNTL/Z. wouter(config)#interface ethernet0 wouter(config-if)#no shutdown wouter(config-if)#shutdown wouter(config-if)# *Jan 10 04:47:32.559: %LINK-5-CHANGED: Interface Ethernet0, changed state to administratively down wouter(config-if)#no shutdown wouter(config-if)# *Jan 10 04:47:48.639: %LINK-3-UPDOWN: Interface Ethernet0, changed state to up *Jan 10 04:47:49.639: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed state to up *Jan 10 04:47:54.359: %LINK-3-UPDOWN: Interface Ethernet0, changed state to down *Jan 10 04:47:55.359: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed state to down wouter(config-if)#
No idea why this is happening and I can't find any info online.
ethernet is always and by default half duplex and 10 mbps. is this your WAN port facing the internet? (i suspect it is due to public IP assigned to it). i could see you have an ATM interface and usually for an 800 series router, it has a ADSL/POTS port which you could use for your WAN. i would suggest to work this out with your ISP.
for the blank config after reload, kindly post your show version output. make sure your config reg is set to 0x2102.
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