Can't ping our border router

  • 0
  • 1
  • Problem
  • Updated 2 years ago
  • Solved
We have a S4 as a border router. Can not ping it or ssh. I can console into it. I can only ping our ISP gateway and nothing else (internal or external). This router is part of BGP.  Traffic is going through, just can't seem to be able to log into it or ping it. 
Photo of Carlos Maldonado

Carlos Maldonado

  • 330 Points 250 badge 2x thumb

Posted 2 years ago

  • 0
  • 1
Photo of Alex Morrissey

Alex Morrissey, Employee

  • 862 Points 500 badge 2x thumb
Hello Carlos,

Are there any ACL's applied to the interfaces or policy applied to the ports on this S4?  Or possibly a service ACL?  Also are you trying to ping/telnet interfaces that are in a VRF?

- Alex
Photo of Carlos Maldonado

Carlos Maldonado

  • 330 Points 250 badge 2x thumb
No ACL or VRF's
Photo of Alex Morrissey

Alex Morrissey, Employee

  • 862 Points 500 badge 2x thumb
Hello Carlos,

At this point I'd suggest logging a case with the GTAC so we can help you trace down why this is happening.  Assuming the traffic is not getting blocked by ACLs, Policy or firewalls then Ping should at least be working

- Alex
Photo of Carlos Maldonado

Carlos Maldonado

  • 330 Points 250 badge 2x thumb
Yep, that's my next step, I got a show support ready. :) Thanks for the help
Photo of Curtis Parish

Curtis Parish

  • 3,332 Points 3k badge 2x thumb
Is your S4  management  IP address in an active VLAN? 
Photo of Carlos Maldonado

Carlos Maldonado

  • 330 Points 250 badge 2x thumb
Yes it is. 
Photo of Curtis Parish

Curtis Parish

  • 3,332 Points 3k badge 2x thumb
Anything would be a guess without seeing a diagram  but another guess is the management traffic is taking a route you are not expecting. Maybe it is picking up default route of BGP.   I would connect with a console cable and run traceroutes from the S4.