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ASA IPSec and CUCM (IP Telephony)

Dear Expert,

I Have topology like this, I want to set IPSec Tunnel Between ASA-1 to ASA-2.

| CUCM Cluster-1 |

           |

           |

       ASA-1

           |

           |

|============|

|  Network Cloud |

|============|

           |

           |

       ASA-2

           |

           |

| CUCM Cluster-2 |

Based on Cisco Documentation http://www.cisco.com/en/US/tech/tk583/tk372/technologies_tech_note09186a00800949c5.shtml some application can't work because MTU issue. Is there any limitation or issue (example : MTU Problem) if i build ipsec between IPTelephony site (CUCM Cluster-1 and CUCM Cluster-2). We already know that IP Telephony need many application, so i am little affraid if i setup IPSec it will cause issue for IPTelephony.

Does anybody have any experience like this ? (Set up IPSec between IPTelephony site), I want to make sure there is no issue or limitation before i set up IPSec

BR,

Rizal Ferdiyan

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