cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
373
Views
7
Helpful
1
Replies

PDU or routing issues

Ayad
Level 1
Level 1

Hi,

When i try to ping my router i get the U caracter :

>>

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 80.125.46.36, timeout is 2 seconds:
U.U.U
Success rate is 0 percent (0/5)

>>

but i can access via telnet to this device.

Does someone know or explain this issue ? is this will cause problems to incoming /out trafic of this remote router ?

Thanks for your reply.

regards,

1 Reply 1

Giuseppe Larosa
Hall of Fame
Hall of Fame

Hello Abzaz,

with telnet you try to open  a TCP (protocol 6) session to port 23 (telnet)

with ICMP you send out packet with protocol 1 code echo request

I would say there is an extended ACL allowing telnet and denying ICMP packets

Hope to help

Giuseppe

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Innovations in Cisco Full Stack Observability - A new webinar from Cisco