[cisco-voip] SRST and dial peers and trunk groups and CallManager MGCP config downloads

[Lelio Fulgenzi]

So here's my scenario: 

    • 3845/3945 router with two or more PRIs 
    • PRIs are in MGCP mode using "ccm-manager config " to download configs 
    • router acts as SRST so MGCP gateways go into H323 fall back 

I had tried configuring trunk groups to use with the dial peers so i wouldn't have to duplicate them for each PRI. This worked until the second SRST trigger. So the behaviour was this: 


    • configure trunk group membership on serial interface as instructed by TAC 
    • configure dial peers to point to trunk group 
    • trigger SRST, make calls, calls work 
    • revert back to normal operation 
    • router downloads MGCP config from CallManager, effectively wiping out the trunk group membership on serial interfaces 
    • trigger SRST, make calls, calls fail because there are no trunk group members 

How are others handling this scenario, i.e. you are using MGCP with "ccm-manager config" command and SRST and trunk groups? 

Why wouldn't CCM allow for a trunk group membership command? I even checked on version 7.1 and there's nothing there. :( 

--- 
Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN) 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
Cooking with unix is easy. You just sed it and forget it. 
- LFJ (with apologies to Mr. Popeil) 


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