Have you tried the 'huntstop' command on DP 200 so that the IOS stops hunting for more dial-peers after matching DP 100 and DP 200?
On 14 August 2017 at 09:09, Brian Meade <[email protected]> wrote: > You can do things like "no voice hunt unassigned-number" and "no voice > hunt invalid-number" on IOS to keep it from trying more dial-peers. > > On Sun, Aug 13, 2017 at 10:47 PM, Ki Wi <[email protected]> wrote: > >> Hi Group, >> I have encountered this interesting problem on customer PBX. Didn't work >> on live system for a long time but I am pretty sure this shouldn't be a >> default behavior. >> >> When external PSTN caller calls an unassigned number in the DID range, >> CUCM returns with error code 27 ( destination out of order). >> >> This causes the voice gateway to retry other dial-peers. >> >> There's 3 dial-peer which matches this e164 number. >> 1)Dial-peer 100 goes CUCM (longest match, most specific) >> 2)Dial-peer 200 goes CUCM (longest match, most specific) >> 3)Dial-peer 300 goes to PSTN (the destination-pattern is .T) >> >> When dial-peer 100 and 200 "fails", the voice gateway will dial-out to >> PSTN via dial-peer 300. Once again, PSTN route back to the customer VG. >> This causes a routing loop and it can fills up all the available E1 >> channels quickly. >> >> >> *Just wondering if anyone encounter the following issue and have a >> explanation to it? Just the engineering side of me want to get down to the >> root cause. * >> >> The CUCM have "stop routing on unallocated number" turns off (false). >> Just in case it matters. >> >> I tried to google around but can't seems to find any article that talks >> about >> 1) dial-peer behaviors (on voice gateway side) - on what error code will >> cisco voice gateway retry other dial-peers? >> 2) why CUCM returns error code 27? >> >> It's a managed service system so I'm unable to do a deep dive >> troubleshooting. >> >> The current workaround introduced is to create a dial-peer 250 with a >> higher preference that matches the DID range and block it. >> >> This means that incoming dialed number will match to 4 dial-peers (100, >> 200, 250 and 300) >> >> After failing on 100 and 200, the call gets block on dial-peer 250. >> >> -- >> Regards, >> Ki Wi >> >> _______________________________________________ >> cisco-voip mailing list >> [email protected] >> https://puck.nether.net/mailman/listinfo/cisco-voip >> >> > > _______________________________________________ > cisco-voip mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/cisco-voip > >
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