Cisco Support Community
Community Member

Pix5x <-> Pix6x tunnel exists; no traffic goes through

We've set up several (ok, more than 1, less than 10) Pix tunnels V5x to V5x. Now the new PIXs have V6x on them. When we config the V6x PIX the same as we have in the past with V5x, the tunnel establishes, but no traffic goes through -- tested most with pings -- and yes we have an access-list allowing icmp -- on both systems and the debugs still say it's being denied.

Does anyone know if

- the V5x VPN is compatible with the V6x?

- there's some special config piece we need to do to get it to work?

Thanks in advance for your help!


Re: Pix5x <-> Pix6x tunnel exists; no traffic goes through

Often times complex troubleshooting issues are best addressed in an interactive trouble-shooting session with one of our trained technical assistance engineers. While other forum users may be able to help, it’s often difficult to do so for this type of issue.

To utilize the resources at our Technical Assistance Center, please visit and to open a case with one of our TAC engineers, visit

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

CreatePlease to create content