08-17-2010 07:36 AM - edited 03-06-2019 12:31 PM
I have a Cisco 2801 ISR with IOS 12.4. It has a basic configuration with F0/0 connected to the public internet and F0/1 connected to my private LAN. My problem is when I administratively shutdown of F0/0, for testing purposes, my connectivity to the LAN interface, is lost. Interestingly however, when I connect to the router via console cable; F0/1 shows as being up and line protocol up and it can be pinged locally however from the router I cannot ping into the rest of the LAN. Executing the clear interface F0/1 command fixes the problem however I don't believe this behaviour is normal. When F0/0 is brought back online, all connectivity is restored. Please let me know if you require any further details or configuration commands, any help would be greatly appreciated.
Thanks in advance,
Chris
08-17-2010 08:58 AM
Chris,
This discussion forum is focused on the Cisco Small Business router series. Your question/issue around the 28XX ISR series would be better served on the Netpro forum under "LAN Routing & Switching" located here.
Best Regards,
08-17-2010 09:02 AM
Thank you Glenn
09-01-2010 06:49 AM
Hi all,
just nudging this one. Any ideas would be greatly appreciated.
Thanks in advance.
09-01-2010 06:53 AM
Hello,
Can you please post the running configuration and the output of "show arp"
from the router?
Regards,
NT
09-01-2010 07:49 AM
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