Teams Direct Routing. Configuration Checklists for BTIP and Business Talk SIP services. 28 january Teams Direct Routing AudioCodes Checklist 0.

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1 Teams Direct Routing Configuration Checklists for BTIP and Business Talk 28 january 2019 Teams Direct Routing AudioCodes Checklist 0.2

2 Contents 1 Main certified architectures Standalone mode High Availability mode Active-active mode Sizing considerations Parameters for connection to BTIP/BTalk AudioCodes SBC Configuration Checklist for BTIP/BTalk Orange Business Services 2 of 20

3 1 Main certified architectures Note that neither simple nor double Media Bypass have been validated so far. Simple Media Bypass would be bypassing Teams cloud for media flows, but not SBC Double Media Bypass would be bypassing both Teams cloud and SBC for media flows Note also that BTIP/BTalk redundancy mechanisms are shown on the drawings. This is not the aim of this document. 1.1 Standalone mode Example 1 offnet call from a BVPN remote site Here, the Teams user belongs to a BVPN site, as does the SBC. There is no Internet breakout within the local site, though that could be the recommended architecture. Without Media Bypass, media flows cross Internet to reach Teams media relays and SBC Orange Business Services 3 of 20

4 Example 2 offnet call from an Internet remote site Here, the Teams user does not belong to a BVPN site and is on Internet Orange Business Services 4 of 20

5 Example 3 offnet call from an Internet remote site with BToI (Business Talk over Internet) BVPN is not mandatory in a Business Talk over Internet architecture. Here is a full Internet architecture. Note that the flows are encrypted from end to end Orange Business Services 5 of 20

6 Example 4 onnet BVPN call In a BVPN architecture, media flows between Teams users belonging to a single BVPN are direct, whether they are on the same site or in distinct sites Orange Business Services 6 of 20

7 1.2 High Availability mode High availability is provided by SBC vendor. This is active-passive mode with a single IP address. From BTIP/BTalk perspective, this is like a single SBC. Example 1 offnet call in nominal mode HA is fully managed by SBC themselves. From Teams and BTIP/BTalk points of view, the architecture behaves as if there was a single SBC Orange Business Services 7 of 20

8 Example 2 offnet call in backup mode When the nominal SBC fails, the backup SBC transparently handles the service. Current calls are not cut Orange Business Services 8 of 20

9 1.3 Active-active mode From BTIP/BTalk perspective, meaning of active-active mode for incoming offnet calls is actually round-robin mode. Example 1 offnet call in an architecture combining two BVPN sites in active-active mode with two SBC in High Availability mode in each Here is an exemple of a somewhat highly resilient architecture that mixes spatial redundancy with load balancing and high availability on each SBC site. Teams use DNS load balancing between the two geographic SBC sites for routing outbound offnet calls. On the other and, BTIP/BTalk provides round-robin between the two sites. The two sites are active-active. In addition, there is here an active-passive resilience within each site. In the next chapter describing connections to BTIP/BTalk, this architecture would be N SBC pairs - BTalk round robin mode over N pairs in vendor HA mode with N=2. Of course, a simpler architecture without the High Availability part could be considered as well Orange Business Services 9 of 20

10 1.4 Sizing considerations Without Media Bypass, flows between SBC and asbc only are involved in RTVo. Call scenario nb of voice channels/media resources used Direct Routing WAN BTIP/BTalk SBC router 1 offnet call from/to the central site* (named HQ) 1 on HQ 1 on HQ 1 on HQ 1 offnet call from/to a remote site on BVPN 1 on HQ 1 on HQ 1 on RS 1 offnet call from/to a remote site on TP Wan** 1 on HQ 1 on HQ 1 on RS 1 offnet call from/to a remote site with put on hold*** 1 on HQ 1 on HQ 1 on RS 1 offnet call from/to a remote site after transfer/forward 2 on HQ 2 on HQ 2 on RS to BTIP * Site where the Direct Routing SBC is ** Third Party Wan *** there is no Music on Hold with Direct Routing yet 2018 Orange Business Services 10 of 20

11 2 Parameters for connection to BTIP/BTalk Head Quarter (HQ) architecture Level of used by the service Single SBC No redundancy SBC SBC pair - Vendor HA mode Redundancy with nominal/backup behavior. SBC pair floating IP@ No loss of calls in case of nominal's failure. N SBC - BTalk round robin mode N SBC pairs - BTalk round robin mode over N pairs in vendor HA mode Redundancy with round robin behavior. Loss of calls handled by a SBC that fails. Redundancy with round robin behavior. No loss of calls handled by any nominal SBC that fails. SBC1 IP@ SBC2 IP@ SBCN IP@ SBC pair1 floating IP@ SBC pair2 floating IP@ SBC pairn floating IP@ Remote Site (RS) architecture** Remote site without survivability Level of Service No survivability, no trunk redundancy 2018 Orange Business Services 11 of 20

12 3 AudioCodes SBC Configuration Checklist for BTIP/BTalk The checklist below presents all steps of configuration required for VISIT SIP Teams offer deployment. The configuration checklist order respects the configuration guideline chapters for more information about the order please refer to [2] Configuration checklist regarding Mediant SBC VE Standalone Step 1 IP Network configuration Step 2 Teams configuration Step 3 Business Talk configuration Step 4 Routing configuration Step 1 - IP Network configuration Ethernet Groups On the Mediant WebUi Interface: SETUP > IP Network > Core entities > Ethernet Groups 1 Ethernet Group for Teams (GROUP_1) 1 Ethernet Group for BTIP (GROUP_2) [Optional] 1 Ethernet Group for HA (GROUP_3) Ethernet Devices SETUP > IP Network > Core entities > Ethernet Devices 1 Ethernet Device for Teams (EthD_Teams) 1 Ethernet Device for BTIP (EthD_BTIP) [Optional] 1 Ethernet Device for HA (EthD_HA) IP Interfaces SETUP > IP Network > Core entities > IP Interface Devices 1 IP Interface for Teams (IPInt_Teams) 1 IP Interface for BTIP (IPInt_BTIP) [Optional] 1 IP Interface for HA (IPInt_HA) NAT Translation SETUP > IP Network > Core entities > NAT Translation Create 1 rule for signalization traffic - Source Interface : IPInt_Teams - Source Start Port : Source End Port : Target IP Address: <SBC Public IP Address> - Target Start Port: Target End Port: 5061 Create 1 rule for media traffic - Source Interface : IPInt_Teams - Source Start Port : Source End Port : Target IP Address: <SBC Public IP Address> - Target Start Port: Target End Port: Orange Business Services 12 of 20

13 Security TLS Contexts On the Mediant WebUi Interface: SETUP > IP Network > Security > TLS Contexts SETUP > IP Network > Security > TLS Contexts > Change Certificate SETUP > IP Network > Security > TLS Contexts > Trusted Root Certificates DNS Internal SRV On the Mediant WebUi Interface: SETUP > IP Network > DNS > Internal SRV Create new TLS Context for Teams traffic - Name: Teams-TLSContext - TLS Version: TLSv1.2 - DTLS Version: DTLSv1.2 - DH Key Size: 2048 Create a new CSR and send it to the public certification authority for signing. Then upload it to the Mediant. Import Root/ Intermediate Certificates Create new internal SRV entry - Domain Name: teams.local - Transport Type: TLS - DNS Name 1: sip.pstnhub.microsoft.com - Priority 1: 1 - Weight 1: 1 - Port 1: DNS Name 2: sip2.pstnhub.microsoft.com - Priority 2: 2 - Weight 2: 1 - Port 2: DNS Name 3: sip3.pstnhub.microsoft.com - Priority 3: 3 - Weight 3: 1 - Port 3: Orange Business Services 13 of 20

14 Step 2 - Teams Configuration Coder Groups On the Mediant WebUi Interface: SETUP > Signaling&Media > Coders & Profiles > Coder Groups IP Profile SETUP > Signaling&Media > Coders & Profiles > IP Profiles Media Realm SETUP > Signaling&Media > Core Entities > Media Realms SIP Interface SETUP > Signaling&Media > Core Entities > SIP Interface Proxy Set SETUP > Signaling&Media > Core Entities > Proxy Set Configure AudioCodersGroups_1 - Coder Name: G711A-law - Packetization Time: 20 - Rate: 64 - Payload Type: 8 - Silence Suppression: Disabled Create new IP Profile for Teams - Name: Teams-IPProfile - SBC Media Security Mode: SRTP - Extension Coders Group: AudioCodersGroup_1 - ICE Mode: Lite - Remote Update Support: Not Supported - Remote re-invite: Supported only with SDP - Remote Delayed Offer Support: Not Supported - Remote REFER Mode: Handle locally - Remote Hold Format: Inactive Create new Media Realm for Teams traffic - Name: Teams-Media - Topology location: UP - IPv4 Interface Name: IPInt_Teams - Port Range Start: Number of Media Session Legs: Default Media Realm: Yes Create new SIP Interface for Teams traffic - Name : Teams-SIPInterface - Topology Location: UP - Network Interface : IPInt_Teams - UDP Port : 0 - TCP Port: 0 - TLS Port: Enable TCP Keep alive: Enable - Classification Failure response Type: 0 - Media Realm: Teams-Media - TLS Context Name: Teams-TLSContext - TLS Mutual Authentication: Disable Create new Proxy Set for Teams traffic - Name : Teams-Proxies - SBC IPv4 SIP Interface : Teams-SIPInterface - TLS Context Name: Teams-TLSContext - Proxy Keep-Alive : Using OPTIONS 2018 Orange Business Services 14 of 20

15 IP Group SETUP > Signaling&Media > Core Entities > IP Group Media Security SETUP > Signaling&Media > Media > IP Media Security RTP / RTCP settings SETUP > Signaling&Media > Media > IP RTP/RTCP Settings DSP Settings SETUP > Signaling&Media > Media > DSP Settings Proxy & Registration SETUP > Signaling&Media > Message Manipulation > Proxy & Registration Message Manipulation SETUP > Signaling&Media > SIP Definitions > Message Manipulations - Proxy Keep-Alive Time : Proxy Hot swap: Enable - Proxy Load Balancing Method : Random Weights - DNS Resolve Method: SRV (Proxy Address Table) : Create 1 Entry for Teams Proxy - Proxy Address : teams.local - Transport Type : TLS Create new IP Group for Teams traffic - Name : Teams-IPGroup - Topology Location: UP - Proxy Set: Teams-Proxies - IP Profile: Teams-IPProfile - Media Realm: Teams-Media - SIP Group Name: <Customer Teams Public FQDN> - Classify by Proxy Set: Disable - Local Host Name: <Customer Teams Public FQDN> - Always use src Address: Yes - DTLS Context: Teams-TLSContext - Proxy Keep-Alive using IP Group settings: Enable Configure following parameters: - Media Security : Enable Configure following parameters: - RTP UDP Port Spacing : 10 - RFC2833 TX Payload Type: FC 2833 Rx Payload Type: 101 Configure following parameters: - Answer Detector Activity Delay: Answer Detector Silence Time: 96 - Answer Detector Sensitivity: 2 - Energy Detector Quality Factor: 0 - Energy Detector Threshold: 0 Configure following parameters: - Gateway Name: <Customer Teams Public FQDN> - Use Gateway Name for Options: Yes Create new message manipulation for SIP Options message - Name : Option-contact-rewrite 1 - Manipulation Set ID: 1 - Row Role: Use Current Condition - Match> Message Type: Options - Match> Condition: param.message.address.dst.sipinterface== <Teams SIP Interface INDEX> - Action> Action Subject: header.contact.url.host - Action> Action Type: Modify 2018 Orange Business Services 15 of 20

16 Message Condition SETUP > Signaling&Media > SIP Definitions > Message Conditions Classification SETUP > Signaling&Media > SBC > Classification SBC General Settings SETUP > Signaling&Media > SBC > SBC General Settings - Action> Action Value: <Customer Teams Public FQDN> Create new message condition for incoming SIP messages - Name : a teams contact - Condition: header.contact.url.host contains pstnhub.microsoft.com Create new classification - Name : From Teams-IPGroup - Source SIP Interface: Teams-SIPInterface - Source IP Address: * - Destination Host: <Customer Teams Public FQDN> - Message Condition: a teams contact - Source IP Group: Teams-IPGroup Configure following parameters: - SBC Performance Profile: Optimized for transcoding 2018 Orange Business Services 16 of 20

17 Step 3 - Business Talk Configuration Coder Groups On the Mediant WebUi Interface: SETUP > Signaling&Media > Coders & Profiles > Coder Groups IP Profile SETUP > Signaling&Media > Coders & Profiles > IP Profiles Media Realm SETUP > Signaling&Media > Core Entities > Media Realms SIP Interface SETUP > Signaling&Media > Core Entities > SIP Interface Proxy Set SETUP > Signaling&Media > Core Entities > Proxy Set Configure AudioCodersGroups_2 - Coder Name: G711A-law - Packetization Time: 20 - Rate: 64 - Payload Type: 8 - Silence Suppression: Disabled Create new IP Profile for Business Talk - Name: BTIP-IPProfile - SBC Media Security Mode: RTP - Symmetric MKI: Disable - MKI Size: 0 - Extension Coders Group: AudioCodersGroup_2 - RFC2833 DTMF Payload Type: P-Asserted-Identity header mode: Add - Remote REFER Mode: Handle locally - Remote 3xx Mode: Handle locally - Remote Hold Format: Send Only Create new Media Realm for Business Talk - Name: BTIP-Media - Topology location: DOWN - IPv4 Interface Name: IPInt_BTIP - Port Range Start: Number of Media Session Legs: Default Media Realm: No Create new SIP Interface for Business Talk - Name : BTIP-SIPInterface - Topology Location: DOWN - Network Interface : IPInt_BTIP - UDP Port : 0 - TCP Port: TLS Port: 0 - Media Realm: BTIP-Media Create new Proxy Set for Business Talk - Name : BTIP-Proxies - SBC IPv4 SIP Interface : BTIP-SIPInterface - Proxy Keep-Alive : Using OPTIONS - Proxy Keep-Alive Time : Proxy Hot swap: Enable - Proxy Load Balancing Method : Round Robin (Proxy Address Table) : Create 2 Entries for Business Talk Proxy - Proxy Address 1 : <Nominal SBC ACME>: Transport Type : TCP - Proxy Address 2 : <Backup SBC ACME>: Orange Business Services 17 of 20

18 - Transport Type : TCP IP Group SETUP > Signaling&Media > Core Entities > IP Group Create new IP Group for Business Talk - Name : BTIP-IPGroup - Topology Location: DOWN - Proxy Set: BTIP-Proxies - IP Profile: BTIP-IPProfile - Media Realm: BTIP-Media - DTLS Context: <empty> Step 4 Routing configuration IP to IP Routing On the Mediant WebUi Interface: SETUP > Signaling&Media > SBC > Routing > IP-to-IP Routing Create 4 IP to IP routing rules: First one regarding OPTIONS Messages: - Name: SIP-OPTIONS-Terminate - Match > Source IP Group: Any - Match > Request Type: OPTIONS - Match > ReRoute IP Group: Any - Action > Destination Type: Dest Address - Action > Destination Address: internal Second one regarding REFER messages: - Name: Transfers - Match > Source IP Group: Any - Match > Call trigger: REFER - Match > Source IP Group: Any - Action > Destination Type: Request URI - Action > Destination IP Group: Teams-IPGroup Third one regarding Business Talk to Teams traffic: - Name: BTIP to Teams - Match > Source IP Group: BTIP-IPGroup - Match > ReRoute IP Group: Any - Action > Destination IP Group: Teams-IPGroup Fourth one regarding Teams to Business Talk traffic: - Name: Teams to BTIP - Match > Source IP Group: Teams-IPGroup - Match > ReRoute IP Group: Any - Action > Destination IP Group: BTIP-IPGroup 2018 Orange Business Services 18 of 20

19 Configuration checklist regarding Mediant SBC VE HA Step 1 Configuration of the first Mediant for HA Step 2 Configuration of the second Mediant for HA Step 3 Initialize HA on the devices Step 1 Configuration of the first Mediant for HA Note: During this stage, make sure that the second device is powered off or disconnected from network. Ethernet Groups On the Mediant WebUi Interface: SETUP > IP Network > Core entities > Ethernet Groups Ethernet Devices SETUP > IP Network > Core entities > Ethernet Devices IP Interfaces SETUP > IP Network > Core entities > IP Interface Devices HA Settings SETUP > IP Network > Core entities > HA Settings - Save the configuration to flash without RESET Use a dedicated Ethernet Group for HA (GROUP_3) Create 1 Ethernet Device for HA - Name: EthD_HA - VLAN ID: 3 - Underlying interface: GROUP3 - Tagging: Untagged - MTU: 1500 Create 1 IP Interface for HA (IPInt_HA) - Name: IPInt_HA - Application Type: MAINTENANCE - Ethernet Device: EthD_HA - IP Address: Prefix length: 24 - Default Gateway: Configure following parameters: - HA Remote Address: Preempt Mode: Enable - HA Device Name: VE-SBC1 - Redundant HA Device Name: VE-SBC2 - Power Down the first Mediant and move to next section (Step2) Step 2 Configuration of the second Mediant for HA Note: During this stage, make sure that the first device is powered off or disconnected from network Orange Business Services 19 of 20

20 Ethernet Groups On the Mediant WebUi Interface: SETUP > IP Network > Core entities > Ethernet Groups Ethernet Devices SETUP > IP Network > Core entities > Ethernet Devices IP Interfaces SETUP > IP Network > Core entities > IP Interface Devices HA Settings SETUP > IP Network > Core entities > HA Settings Configuration must be identical comparing to the first Mediant. Configuration must be identical comparing to the first Mediant. Create 1 IP Interface for HA (IPInt_HA) - Name: IPInt_HA - Application Type: MAINTENANCE - Ethernet Device: EthD_HA - IP Address: Prefix length: 24 - Default Gateway: Configure following parameters: - HA Remote Address: Preempt Mode: Enable - HA Device Name: VE-SBC2 - Redundant HA Device Name: VE-SBC1 - Save the configuration to flash without RESET - Power Down the second Mediant and move to next section (Step3) Step 3 Initialize HA on the devices Note: You must connect both ports (two) in the Ethernet Group of the Maintenance interface to the network (i.e., two network cables are used). This provides 1+1 Maintenance port redundancy. 1. Cable the devices to the network. 2. Power up the devices; the redundant device synchronizes with the active device and updates its configuration according to the active device. The synchronization status is indicated as follows: 2018 Orange Business Services 20 of 20

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