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Why "no route to host", but VPN tunnel troubleshoot shows remote host?

Hello.
On an ASA 1120 I'm troubleshooting a failing L2L VPN turn-on. The remote engineer requests I run a traceroute to his device. When I try this I experience error "no route to host."
This doesn't make sense to me because during troubleshoot it is true that packets are exchanged between devices (so a route definitely exists by definition). It is true that a few days have passed since the VPN endpoints communicated.
Also,

show route

reveals "Gateway of last resort is not set".
Route exists= "S 0.0.0.0 0.0.0.0 [255/0] via 172.16.1.1, inside tunneled"

How do I successfully run this requested traceroute?

Thank you.

1 Accepted Solution

Accepted Solutions

THIS IS GREAT (below). Wow what a tool!...


#packet-tracer input [src_int] protocol src_addr src_port dest_addr dest_port [detailed] [xml]
#packet-tracer input inside(interface from which the interesting traffic is generated) icmp x.x.x.x( interesting traffic at your end ) 8 0 x.x.x.x(interesting traffic at remote end) detailed

 

Troubleshooting Access Problems Using Packet-Tracer - Cisco Community

View solution in original post

3 Replies 3

THIS IS GREAT (below). Wow what a tool!...


#packet-tracer input [src_int] protocol src_addr src_port dest_addr dest_port [detailed] [xml]
#packet-tracer input inside(interface from which the interesting traffic is generated) icmp x.x.x.x( interesting traffic at your end ) 8 0 x.x.x.x(interesting traffic at remote end) detailed

 

Troubleshooting Access Problems Using Packet-Tracer - Cisco Community

What is the meaning/relevance of  "8 0" in below code?

 

#packet-tracer input inside(interface from which the interesting traffic is generated) icmp x.x.x.x( interesting traffic at your end ) 8 0 x.x.x.x(interesting traffic at remote end) detailed

 

Thank you.

icmp_types.png
8 0 meaning echo request 

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