05-02-2007 07:19 AM - edited 03-03-2019 04:47 PM
It's a 3700 router. I am wondering, icmp ping could not reach to F0/0 from outside. i can ping and telnet to s0/0.
int s0/0 - 1.1.1.1/30
int f0/0 - 172.16.1.1/24
I do an extended ping within this router. source s0/0 and target f0/0. No Response.
No Access-list configured.
It was working for many years and I can telnet to the F0/0 before. Right now, no response either ping or telnet.
any idea?
05-02-2007 07:36 AM
What's the interface status of F0/0 ?
05-02-2007 07:40 AM
s0/0 and f0/0 are up/up status ...
05-02-2007 07:46 AM
Do you have a route for the Fa subnet 172.16.1.0/24 from the other end router?
Narayan
05-02-2007 07:49 AM
yes...
ip route 0.0.0.0 0.0.0.0 1.1.1.2
This is a live network, i'm just giving here a fake ip address but the setup is the same to narrow down the issue.
I can telnet to the s0/0 from outside. All interfaces are UP/UP.
05-02-2007 07:55 AM
Can u PING the 172.x.x.x interface (Gateway, I guess) while on the 172.x.x.x LAN/VLAN
05-02-2007 08:01 AM
i think there's something wrong with my ISP. They probably remove routes on their end. I can't route from F0/0 to anywhere (ex.4.2.2.2).
05-02-2007 08:08 AM
yes i can ping from host(LAN) to the gateway F0/0.
weird thing, the host could route to outside and internet is fine.
I do an extended ping:
target - 4.2.2.2
source - FO/0
result - no response
target - 4.2.2.2
source - s0/0
result - successful
05-02-2007 07:57 AM
can you post the configs of the 2 routers
Narayan
05-02-2007 09:13 AM
I reload the router and works now ...No problem on the configuration.
One thing that i didn't do is clear ip route *. But, reloading is much helpful. Strange problem.
05-02-2007 09:19 AM
Hi,
Please make sure that you've configured keepalive under the ethernet interface.
HTH,
Mohammed Mahmoud.
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