Licensing & Sizing¶
1.4 Network Readiness Assessment¶
1.4.1 Bandwidth Requirements¶
Codec Bandwidth Calculations:
| Codec | Sample Rate | Bitrate | With Headers (IP/UDP/RTP) | MOS Score |
|---|---|---|---|---|
| G.711 (PCM) | 8 kHz | 64 kbps | 87.2 kbps | 4.1 |
| G.722 (HD Voice) | 16 kHz | 64 kbps | 87.2 kbps | 4.3 |
| G.729 | 8 kHz | 8 kbps | 31.2 kbps | 3.9 |
| Opus (Webex) | Variable | 24-64 kbps | 40-90 kbps | 4.2-4.5 |
Site Bandwidth Requirements:
| Site | Users | Concurrent Calls (20%) | Required BW (G.711) | Required BW (Opus) | Current WAN | Status |
|---|---|---|---|---|---|---|
| Mumbai HQ | 1,200 | 240 | 21 Mbps | 18 Mbps | 1 Gbps DIA | [OK] Adequate |
| Chennai | 450 | 90 | 8 Mbps | 7 Mbps | 500 Mbps DIA | [OK] Adequate |
| Bangalore | 180 | 36 | 3.2 Mbps | 2.8 Mbps | 200 Mbps DIA | [OK] Adequate |
| Delhi | 150 | 30 | 2.7 Mbps | 2.4 Mbps | 200 Mbps DIA | [OK] Adequate |
| Noida | 120 | 24 | 2.2 Mbps | 1.9 Mbps | 100 Mbps DIA | [OK] Adequate |
| Pune | 100 | 20 | 1.8 Mbps | 1.5 Mbps | 100 Mbps DIA | [OK] Adequate |
| Hyderabad | 200 | 40 | 3.6 Mbps | 3.1 Mbps | 200 Mbps DIA | [OK] Adequate |
| London | 520 | 104 | 9.2 Mbps | 8 Mbps | 1 Gbps DIA | [OK] Adequate |
| Frankfurt | 280 | 56 | 5 Mbps | 4.3 Mbps | 500 Mbps DIA | [OK] Adequate |
| New Jersey | 480 | 96 | 8.5 Mbps | 7.4 Mbps | 1 Gbps DIA | [OK] Adequate |
| Dallas | 270 | 54 | 4.8 Mbps | 4.2 Mbps | 500 Mbps DIA | [OK] Adequate |
Additional Bandwidth Considerations:
| Traffic Type | Per-Session BW | Notes |
|---|---|---|
| Webex Meetings (Video HD) | 2.5 Mbps | 1080p send/receive |
| Webex Meetings (Video SD) | 1 Mbps | 720p send/receive |
| Screen Sharing | 0.5-2.5 Mbps | Variable based on content |
| Messaging/Presence | 50 kbps | Per user average |
| Software Updates | Varies | Schedule during off-hours |
1.4.2 Internet Connectivity Assessment¶
Reference: This section builds on the existing Abhavtech SD-WAN deployment documented in ABV-SDWAN-2024. The SD-WAN fabric provides the underlying transport for Webex Calling traffic.
Existing SD-WAN Fabric Overview:
+-----------------------------------------------------------------------------+
| ABHAVTECH SD-WAN FABRIC - WEBEX CALLING INTEGRATION |
+-----------------------------------------------------------------------------+
| |
| +--------------------------+ |
| | vManage / vBond | |
| | (Mumbai DC) | |
| | vmanage.abhavtech.com | |
| +------------+-------------+ |
| | |
| +--------------------+--------------------+ |
| | | | |
| +-----+-----+ +------+------+ +-----+-----+ |
| | Hub 1 | | Hub 2 | | Hub 3 | |
| | Mumbai | | London | | Dallas | |
| | cEdge | | cEdge | | cEdge | |
| +-----+-----+ +------+------+ +-----+-----+ |
| | | | |
| +--------+--------+ +------+------+ +-----+-----+ |
| | | | | | | | |
| India India India Frankfurt New Jersey |
| Sites Sites Sites (Spoke) (Spoke) |
| (Spokes) (Spokes) (Spokes) |
| |
| TRANSPORT: DIA (Primary) + MPLS (Secondary) + LTE (Tertiary) |
| OVERLAY: IPsec tunnels with BFD |
| ROUTING: OMP with hub preference |
| |
+-----------------------------------------------------------------------------+
SD-WAN Transport Circuits (Current State):
| Site | cEdge Model | Transport 1 (DIA) | Transport 2 | Transport 3 (LTE) | SD-WAN Status |
|---|---|---|---|---|---|
| Mumbai HQ | C8300-2N2S-4T2X | Tata 1 Gbps | MPLS 500 Mbps | Jio LTE | [OK] Dual + LTE |
| Chennai | C8300-1N1S-4T2X | Airtel 500 Mbps | MPLS 200 Mbps | Airtel LTE | [OK] Dual + LTE |
| Bangalore | C8200-1N-4T | Jio 200 Mbps | - | Jio LTE | [OK] DIA + LTE |
| Delhi | C8200-1N-4T | Tata 200 Mbps | - | Airtel LTE | [OK] DIA + LTE |
| Noida | C8200-1N-4T | Airtel 100 Mbps | - | Jio LTE | [OK] DIA + LTE |
| Pune | C8200-1N-4T | Tata 100 Mbps | MPLS 50 Mbps | - | [OK] Dual |
| Hyderabad | C8200-1N-4T | Jio 200 Mbps | - | Airtel LTE | [OK] DIA + LTE |
| London | C8300-1N1S-4T2X | BT 1 Gbps | MPLS 500 Mbps | Vodafone LTE | [OK] Dual + LTE |
| Frankfurt | C8200-1N-4T | DT 500 Mbps | - | Vodafone LTE | [OK] DIA + LTE |
| New Jersey | C8300-1N1S-4T2X | AT&T 1 Gbps | MPLS 500 Mbps | Verizon LTE | [OK] Dual + LTE |
| Dallas | C8200-1N-4T | AT&T 500 Mbps | - | Verizon LTE | [OK] DIA + LTE |
Webex Calling Traffic Path via SD-WAN:
+-----------------------------------------------------------------------------+
| WEBEX CALLING TRAFFIC FLOW - SD-WAN INTEGRATION |
+-----------------------------------------------------------------------------+
| |
| +--------------+ +--------------+ +--------------+ |
| | Webex App | | SD-WAN | | Webex | |
| | or Phone |--->| cEdge |--->| Cloud | |
| | (Endpoint) | | (Site) | | (Region) | |
| +--------------+ +--------------+ +--------------+ |
| | |
| v |
| +--------------+ |
| | SD-WAN | |
| | Policy | |
| | ============| |
| | App: Webex | |
| | SLA: Voice | |
| | Path: DIA | |
| | (preferred) | |
| +--------------+ |
| |
| SD-WAN APPLICATION-AWARE ROUTING FOR WEBEX: |
| --------------------------------------------- |
| * App Recognition: Deep packet inspection identifies Webex traffic |
| * SLA Class: Real-time voice/video (latency <150ms, jitter <30ms) |
| * Preferred Path: DIA (direct internet) for lowest latency |
| * Failover: Automatic to MPLS/LTE if DIA degrades |
| * Cloud OnRamp: Direct path to Webex cloud (where available) |
| |
+-----------------------------------------------------------------------------+
SD-WAN Readiness for Webex Calling:
| Requirement | Current SD-WAN State | Action Required |
|---|---|---|
| Application Recognition | [OK] Webex app signatures loaded | Verify latest signature pack |
| SLA Class for Voice | [OK] Real-time SLA class exists | Map Webex to existing class |
| DIA Breakout | [OK] Local internet exit enabled | Confirm Webex URLs in policy |
| Cloud OnRamp for SaaS | [!]️ Not configured | Enable for Webex (optional) |
| BFD for Path Monitoring | [OK] Enabled on all tunnels | No change |
| Dual/Multi Transport | [OK] All sites have 2+ transports | No change |
Latency to Webex Data Centers (Measured via SD-WAN):
| Site | Webex DC | Measured Latency | Jitter | Packet Loss | Status |
|---|---|---|---|---|---|
| Mumbai HQ | Mumbai + Chennai | 32ms | 4ms | 0.01% | [OK] Excellent |
| Chennai | Mumbai + Chennai | 38ms | 5ms | 0.02% | [OK] Excellent |
| Bangalore | Mumbai + Chennai | 35ms | 4ms | 0.01% | [OK] Excellent |
| Delhi | Mumbai + Chennai | 42ms | 6ms | 0.03% | [OK] Good |
| Noida | Mumbai + Chennai | 45ms | 7ms | 0.02% | [OK] Good |
| Pune | Mumbai + Chennai | 38ms | 5ms | 0.02% | [OK] Excellent |
| Hyderabad | Mumbai + Chennai | 36ms | 5ms | 0.01% | [OK] Excellent |
| London | London DC | 8ms | 2ms | 0.00% | [OK] Excellent |
| Frankfurt | Frankfurt DC | 5ms | 1ms | 0.00% | [OK] Excellent |
| New Jersey | US East DC | 12ms | 3ms | 0.01% | [OK] Excellent |
| Dallas | US DC | 18ms | 4ms | 0.01% | [OK] Excellent |
1.4.3 QoS Readiness¶
Reference: QoS policies build on existing configurations from ABV-SDWAN-2024 (WAN edge) and ABV-SDA-ISE-2025 (campus/DNA Center). Webex Calling traffic leverages the established QoS framework.
Existing QoS Architecture (SD-WAN + DNA Center):
+-----------------------------------------------------------------------------+
| ABHAVTECH QOS ARCHITECTURE - END-TO-END |
+-----------------------------------------------------------------------------+
| |
| +-------------+ +-------------+ +-------------+ +-------------+ |
| | Endpoint |--->| Access |--->| SD-WAN |--->| Webex | |
| | (Phone/App)| | Switch | | cEdge | | Cloud | |
| +-------------+ +-------------+ +-------------+ +-------------+ |
| | | | | |
| v v v v |
| DSCP Marking DNA Center vManage Cloud SLA |
| at Source QoS Policy App-Route Monitoring |
| (Phone/App) (Campus) (WAN) |
| |
| LAYER | PLATFORM | POLICY SOURCE | MANAGEMENT |
| ======================================================================= |
| Endpoint (L2) | Cisco Phones | Phone config | CUCM -> Webex |
| Access Layer | Cat 9300/9200 | DNA Center | DNAC 2.3.5 |
| Distribution | Cat 9500 | DNA Center | DNAC 2.3.5 |
| WAN Edge | C8300/C8200 | vManage | vManage 20.12|
| Internet | ISP | Best Effort | N/A |
| |
+-----------------------------------------------------------------------------+
Current DNA Center QoS Policy (Campus - SD-Access):
| Traffic Class | DSCP | Queue | BW Allocation | Applied To |
|---|---|---|---|---|
| Voice | EF (46) | Priority | 10% (strict) | Voice VLANs |
| Video Conferencing | AF41 (34) | Priority | 13% | Data VLANs |
| Voice Signaling | CS3 (24) | Assured | 2% | Voice VLANs |
| Interactive Video | AF42 (36) | Assured | 15% | Data VLANs |
| Network Control | CS6 (48) | Assured | 3% | Mgmt VLANs |
| Transactional Data | AF21 (18) | Assured | 10% | Data VLANs |
| Bulk Data | AF11 (10) | Assured | 4% | Data VLANs |
| Scavenger | CS1 (8) | Best Effort | 1% | All VLANs |
| Best Effort | BE (0) | Default | 25% | All VLANs |
Current SD-WAN QoS Policy (vManage - Centralized):
! Existing SD-WAN Application-Aware Routing Policy (vManage)
! Policy Name: ABV-SDWAN-QOS-POLICY
sdwan
app-route-policy ABV-SDWAN-QOS-POLICY
!
vpn-list VPN-CORPORATE
sequence 10
match
app-list REAL-TIME-VOICE
dscp 46
action
sla-class VOICE-SLA strict
cloud-saas
!
sequence 20
match
app-list REAL-TIME-VIDEO
dscp 34 36
action
sla-class VIDEO-SLA strict
!
sequence 30
match
app-list VOICE-SIGNALING
dscp 24
action
sla-class SIGNALING-SLA
!
sequence 100
match
app-list ALL
action
sla-class DEFAULT-SLA
!
!
!
sla-class VOICE-SLA
latency 150
loss 1
jitter 30
!
sla-class VIDEO-SLA
latency 200
loss 2
jitter 50
!
!
Webex Calling QoS Requirements vs Current State:
| Traffic Type | Webex Required DSCP | Current DNA Center | Current SD-WAN | Status |
|---|---|---|---|---|
| Media (Audio) | EF (46) | EF (46) - Voice | VOICE-SLA | [OK] Aligned |
| Media (Video) | AF41 (34) | AF41 (34) - Video | VIDEO-SLA | [OK] Aligned |
| Signaling | CS3 (24) | CS3 (24) - Signaling | SIGNALING-SLA | [OK] Aligned |
| App Sharing | AF41 (34) | AF41 (34) - Video | VIDEO-SLA | [OK] Aligned |
QoS Update Requirements:
| Component | Current State | Required Update | Action |
|---|---|---|---|
| DNA Center | Voice policy exists | Add Webex app recognition | Update Application Policy |
| SD-WAN vManage | Real-time SLA exists | Add Webex to REAL-TIME-VOICE list | Update App List |
| Access Switches | Trust DSCP enabled | No change | Verify only |
| Phones (MPP) | Will mark EF | No change | Automatic |
| Webex App | Marks DSCP natively | No change | Verify firewall preserves |
DNA Center Application Policy Update for Webex:
! DNA Center Application Policy Update
! Add Webex applications to existing Voice/Video business relevance groups
Application Policy: ABV-QUEUING-POLICY
+-- Business Relevant
| +-- Voice (Existing)
| | +-- cisco-phone (existing)
| | +-- sip (existing)
| | +-- webex-calling [ADD]
| | +-- webex-voice [ADD]
| |
| +-- Video Conferencing (Existing)
| | +-- cisco-webex-meeting (existing)
| | +-- webex-video [ADD]
| | +-- webex-share [ADD]
| |
| +-- Signaling (Existing)
| +-- sip-tls (existing)
| +-- webex-signaling [ADD]
|
+-- Default (unchanged)
! Deploy to: All Sites via Fabric Provisioning
SD-WAN Application List Update for Webex:
! vManage - Update Application Lists for Webex Calling
policy
app-list REAL-TIME-VOICE
app cisco-phone
app sip
app webex ! Existing
app webex-calling ! ADD - Webex Calling specific
app webex-audio ! ADD - Webex audio streams
!
app-list REAL-TIME-VIDEO
app webex-video
app webex-share
app webex-meetings
!
app-list VOICE-SIGNALING
app sip-tls
app webex-signaling
!
!
! Cloud OnRamp for SaaS (Optional Enhancement)
cloud-onramp saas
app webex
vpn 10
gateway direct-internet
probe-frequency 30
!
!
!
QoS Validation Commands:
! SD-WAN cEdge - Verify Webex traffic classification
show sdwan app-route stats | include webex
show sdwan policy app-route-policy-filter
! DNA Center managed switch - Verify QoS policy
show policy-map interface GigabitEthernet1/0/1
show class-map
show mls qos interface statistics
! Verify DSCP marking preservation
show ip access-list | include permit.*46
QoS Readiness Summary:
| Area | Status | Notes |
|---|---|---|
| Campus QoS (DNA Center) | [OK] Ready | Minor app recognition update needed |
| WAN QoS (SD-WAN) | [OK] Ready | Add Webex to existing SLA classes |
| Voice VLAN | [OK] Ready | Already configured for Cisco phones |
| DSCP Trust | [OK] Ready | Enabled on all access ports |
| Firewall DSCP | [!]️ Verify | Confirm DSCP preservation through firewalls |
| ISP SLA | [!]️ Best Effort | Internet transit is best effort (expected) |