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Dial Peer hunting question

We have two CUBE routers, One in HQ, the other in DR. We have CUCM cluster that spans HQ and DR.

CUBEs connect to CUCM via SIP trunk.

Both CUBE routers are configured identically with dial-peers prioritized. When we do our annual DR test, we shut everything on the HQ side down and test for two days. Session target 11.22.33.44 is not available as it's switchport is shut down.

During that time, there are some calls and FAXs that do not go through and the caller receives a fast busy. I discovered that the dial-peer hunting is not going to the "preference 2" dial-peer.

Per TAC, this is correct operation because DR CUBE is not receiving anything from session target 11.22.33.44 to indicate the call is not reaching it's destination, so we get fast busy. Also per TAC, there is not anything that can be done about it.

Does anyone have a different take on this?

One thing that can be done is on the DR CUBE, move the "priority 1"  to "priority 3", but there are a lot of other dial-peers that point to the HQ side. In the event of an actual disaster and that seesion target is unavailable, do all of the voice gateways have to be reconfigured to allow calls to go through?

!

dial-peer voice 1117890 voip

preference 1

destination-pattern 1234567890$

session target ipv4:11.222.33.44

incoming called-number 1234567890

codec g711ulaw

fax protocol pass-through g711ulaw

no vad

!

dial-peer voice 2117890 voip

preference 2

destination-pattern 1234567890$

session target ipv4:11.22.33.45

incoming called-number 1234567890

codec g711ulaw

fax protocol pass-through g711ulaw

no vad

!

dial-peer voice 3117890 voip

preference 3

destination-pattern 1234567890$

session target ipv4:11.22.33.45

incoming called-number 1234567890

codec g711ulaw

fax protocol pass-through g711ulaw

no vad

!

1 REPLY
Hall of Fame Super Silver

Dial Peer hunting question

What cause are you getting?

Try adding:

voice hunt user-busy

HTH,

Chris

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