© 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v5.05-1 Implementation of Multiple Site Deployment Configuring Call Admission Control in Cisco Unified. - презентация

1 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Implementation of Multiple Site Deployment Configuring Call Admission Control in Cisco Unified CallManager Release 5.0

2 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Location-Based Call Admission Control Configuration Overview Location-based call admission control configuration steps: 1. Configure regions -Audio codec -Video call bandwidth (optional) -Modify relationships to other regions 2. Configure locations -Audio bandwidth -Video bandwidth -RSVP settings (optional) -Modify settings to other locations 3. Assign devices to regions and locations

3 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Region Configuration Configure a region-to-region relationship and assign: Audio codec Video call bandwidth (optionally)

4 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Location Configuration Configure a separate location for each IP WAN connection. Assign locations to devices.

5 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Need for AAR Region relationship Denver-Atlanta: G.729 (24 kbps per call) Locations bottleneck: Atlanta (240 kbps)max 10 voice calls AAR reroutes all subsequent calls through PSTN –Dial prefix prepended to internal directory numbers (5xx or 6xx) IP WAN Denver max. 240 kbpsmax kbps 5xx Atlanta 6xx VoIP-GW PSTN-GW GW PSTN Max 10 calls through WAN Subsequent calls through PSTN

6 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v AAR Configuration in Cisco Unified CallManager Steps to configure location-based call admission control: 1. Configure the locations 2. Configure the regions 3. Assign devices to the region and location AAR configuration: 1. Enable AAR cluster-wide 2. Configure AAR groups 3. Configure the calling search space for AAR 4. Configure the endpoints for AAR

7 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Enable AAR Call Admission Control and AAR Messages in Service Parameters AAR Clusterwide Parameters

8 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v AAR Group Configuration Establishes the prefix digits that are used for AAR within the AAR group and between groups

9 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Endpoint Configuration for AAR: AAR Group and AAR Calling Search Space Choose the AAR calling search space in IP phone device settings to search for the outgoing gateway when the call is rerouted Choose the AAR group in IP phone line settings

10 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Endpoint Configuration for AAR: External Line Mask Establishes the fully qualified PSTN number Configured in IP phone Line window

11 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Gatekeeper Call Admission Control Configuration Overview Gatekeeper-based call admission control configuration steps: 1. Configure the gatekeeper device (Cisco IOS router) 2. Configure gatekeeper settings in Cisco Unified CallManager -Host name or IP address -Timeouts (optional) 3. Configure gatekeeper-controlled trunk -H.225 trunk -Intercluster trunk

12 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Gatekeeper Configuration on the Router SJGK(config)# gatekeeper SJGK(config-gk)# zone local SJGK cisco.com SJGK(config-gk)# zone prefix SJGK 408* SJGK(config-gk)# gw-type-prefix 1#* default-technology SJGK(config-gk)# bandwidth total zone SJGK 512 SJGK(config-gk)# bandwidth session zone SJGK 256 Configure zones and bandwidth allocations on the gatekeeper. IP H.323 Zone: SJGK Cisco IOS Gatekeeper max. 512 kbps GK

13 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Gatekeeper Configuration in Cisco Unified CallManager Configure gatekeeper settings and trunk in Cisco Unified CallManager.

14 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Cisco Unified CallManager RSVP Configuration RSVP configuration steps on Cisco Unified CallManager: 1. Configure clusterwide default RSVP policy and parameters. 2. Configure the RSVP policy for any location pair that requires a different RSVP policy than the clusterwide default RSVP policy. The RSVP policy on the location pair overrides the clusterwide RSVP policy. 3.Optionally, change default DSCP marking behavior when the RSVP reservation fails. 4. Enable RSVP for a callallocate RSVP agents to MRGLs, and assign the MRGLs to endpoint devices. 5. Configure RSVP agents for media devices. Configuration steps on RSVP agent: 1. Configure the IOS-based RSVP agent.

15 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Clusterwide RSVP Policy Service Parameters Clusterwide default RSVP policies available: No Reservation: No RSVP reservations are made between locations. Optional (Video Desired): A call can proceed as a best-effort, audio-only call if failure to obtain reservations for both audio and video streams occurs. Mandatory: Both audio and video (if video call) reservations must succeed for Cisco Unified CallManager to ring terminating device. Mandatory (Video Desired): A video call can proceed as an audio-only call if a reservation for the audio stream succeeds but a reservation for the video stream does not succeed. RVSP retry timer: Defines how often (in seconds) the RSVP agent will retry the reservation if there is a failure. Midcall RSVP error handling: If a midcall failure occurs, defines whether call becomes best-effort or fails after N tries. Mandatory RSVP midcall retry counter: Defines the N tries for midcall error handling.

16 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Recommended Settings for Default System Policy Mandatory (Video Desired) is the recommended setting for most customers Provides equivalent of current location behavior: –Audio call will fail or revert to AAR if audio channel RSVP reservation fails –Video call will proceed as audio-only if video channel RSVP reservation fails

17 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Configure RSVP Policy Per Location Pair

18 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Configure Default DSCP Marking Used if RSVP Reservation Fails Cisco Unified CallManager instructs agents (or endpoints if agents are not available) to re-mark DCSP values to default (best-effort) for audio and video calls if the reservation fails. Otherwise, an excess of EF-marked media packets could degrade QoS, even for flows that have a reservation.

19 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Enable RSVP for a Call 1. Create an MRGL that includes the RSVP agent. 2. Assign the MRGL to the device or the device pool associated with the device. The RSVP reservation will fail if the same RSVP agent is used for both endpoints that are making the call.

20 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Configure RSVP for Media Devices Conference bridge, MOH, and annunciator do not specify MRGL configuration. RSVP resources can be made available for these by associating a device pool with their configuration. The MRGL associated with the device pool will be used for allocating RSVP resources for these media devices.

21 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Gateway RSVP Configuration dspfarm profile profile-identifier {mtp | transcode} router(config)# Enters DSP farm profile configuration mode to define a profile for DSP farm services codec pass-through router(config-dspfarm-profile)# Enables codec pass-through mode for the DSP farm profile Mandatory to support Cisco Unified CallManager maximum sessions number router(config-dspfarm-profile)# Specifies the maximum number of sessions that are supported by the profile

22 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Gateway RSVP Configuration (Cont.) associate application sccp router(config-dspfarm-profile)# Associates the SCCP protocol to the DSP farm profile. rsvp router(config-dspfarm-profile)# Enables RSVP support in the DSP farm profile. no shutdown router(config-dspfarm-profile)# Enables the profile, allocates DSP farm resources, and associates the application.

23 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Gateway RSVP Configuration Example Cisco Unified CallManager RSVP Agent Loopback: interface Loopback0 ip address ! interface Serial0/0 ip address ip rsvp bandwidth ! ip rsvp policy preempt ! sccp local Loopback0 sccp ccm identifier 1 priority 1 version sccp ! sccp ccm group 1 associate ccm 1 priority 1 associate profile 1 register RSVP-Agent ! dspfarm profile 1 mtp codec pass-through rsvp maximum sessions software 100 associate application SCCP

24 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Verifying RSVP show dspfarm profile profile-number router# Verifies the configuration and status of the DSP farm resource. Router#show dspfarm profile 20 Dspfarm Profile Configuration Profile ID = 20, Service = TRANSCODING, Resource ID = 1 Profile Description : Profile Admin State : UP Profile Operation State : ACTIVE Application : SCCP Status : ASSOCIATED Resource Provider : FLEX_DSPRM Status : UP Number of Resource Configured : 5 Number of Resource Available : 5 Codec Configuration Codec : g711alaw, Maximum Packetization Period : 30 Codec : g711ulaw, Maximum Packetization Period : 30 Codec : g729r8, Maximum Packetization Period : 60 Codec : pass-through, Maximum Packetization Period : 0 RSVP : ENABLED

25 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Verifying RSVP (Cont.) show sccp ccm group group-number router# Verifies the DSP farm profiles that are assigned to the Cisco Unified CallManager group and the registration names of the SCCP devices Router#show sccp ccm group 1 CCM Group Identifier: 1 Description: None Binded Interface: NONE, IP Address: NONE Associated CCM Id: 1, Priority in this CCM Group: 2 Associated CCM Id: 2, Priority in this CCM Group: 3 Associated Profile: 10, Registration Name: mtp_A1 Associated Profile: 20, Registration Name: xcoder_A1 Associated Profile: 110, Registration Name: mtp_A2 Associated Profile: 120, Registration Name: xcoder_A2 Registration Retries: 3, Registration Timeout: 10 sec Keepalive Retries: 3, Keepalive Timeout: 30 sec CCM Connect Retries: 3, CCM Connect Interval: 10 sec Switchover Method: GRACEFUL, Switchback Method: GRACEFUL_GUARD Switchback Interval: 10 sec, Switchback Timeout: 7200 sec Signaling DSCP value: default, Audio DSCP value: default

26 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Summary Locations-based call admission control involves configuration of regions and locations to specify the bandwidth that is used for calls within a region and between existing regions, and to determine how much bandwidth is available between Cisco Unified CallManager cluster sites. Configuring AAR entails configuring AAR groups and assigning the external phone number mask to the directory number. Configure the gatekeeper in Cisco IOS software and the gatekeeper and trunk settings (gatekeeper-controlled) in Cisco Unified CallManager to implement call admission control in a distributed deployment.

27 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v Summary (Cont.) Configuring RSVP in Cisco Unified CallManager Release 5.0 requires configuring the global default RSVP policy, and any location-pair policies that differ from the global. The RSVP agent is a transcoding or MTP device on the Cisco IOS gateway that registers with Cisco Unified CallManager and it is controlled through SCCP. Configuration of an RSVP agent on the Cisco IOS gateway is performed by enabling RSVP in a DSP farm profile.

28 © 2006 Cisco Systems, Inc. All rights reserved. CIPT1 v