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• Configuring Call Admission Control    

Configuring Call Admission Control

Call admission control (CAC) prevents bottlenecks by limiting new and active dialogs and transactions. You configure CAC criteria in admission control profiles. You then assign the profiles to actions in new transaction policies.

Configuring Admission Control Profiles

To cause the software to block all new dialogs or out-of-dialog transactions and to send 403 (Forbidden) messages, set the relevant committed-attempts-rate to 0 and the maximum-burst-size to 0.

To configure an admission control profile for CAC:

1. Create an admission control profile.
   [edit services border-signaling-gateway gateway bsg-1]user@host# edit admission-control acprofile1
2. Access the dialog configuration for this profile.
   [edit services border-signaling-gateway gateway bsg-1 admission-control acprofile1]user@host# edit dialogs
3. Configure the maximum number of concurrent dialogs.
   [edit services border-signaling-gateway gateway bsg-1 admission-control acprofile1 dialogs]user@host# set maximum-concurrent 50000
4. Configure the maximum number of new dialog attempts per second.
   [edit services border-signaling-gateway gateway bsg-1 admission-control acprofile1 dialogs]user@host# set committed-attempts-rate 50
5. Configure the maximum burst size (number of dialog attempts).
   [edit services border-signaling-gateway gateway bsg-1 admission-control acprofile1 dialogs]user@host# set committed-burst-size 100
6. Access the transaction configuration level for this profile.
   [edit services border-signaling-gateway gateway bsg-1 admission-control acprofile1 dialogs]user@host# up 1[edit services border-signaling-gateway gateway bsg-1 admission-control acprofile1]user@host# edit transactions
7. Configure the maximum number of concurrent transactions.
   [edit services border-signaling-gateway gateway bsg-1 admission-control acprofile1 transactions]user@host# set maximum-concurrent 50000
8. Configure the maximum number of new transaction attempts per second.
   [edit services border-signaling-gateway gateway bsg-1 admission-control acprofile1 transactions]user@host# set committed-attempts-rate 50
9. Configure the maximum burst size (number of transaction attempts).
   [edit services border-signaling-gateway gateway bsg-1 admission-control acprofile1 transactions]user@host# set committed-burst-size 100

Assigning Admission Control Profiles to New Transaction Policies

To assign a controller, add the name of a controller to the then action in a new transaction policy.

To assign a profile to a new transaction policy:

1. Access the configuration of the new transaction policy.
   [edit]user@host# edit services border-signaling-gateway gateway bsg–1 sip new-transaction-policy policy10 term peer-to-peer then
2. Assign an admission control profile to the new transaction policy.
   [edit services border-signaling-gateway gateway bsg–1 sip new-transaction-policy policy10 term peer-to-peer then]user@host# set admission-control acprofile1